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Introduction to Rate Selectability

 

Support for multiple speeds is defined as rate selectable or multi-rate. Use this topic to understand more about rate selectability or multi-rate ports in a network device or in a network component such as a line card.

Understanding Rate Selectability

The maximum amount of data that can be transmitted through a port at any given second either by a network device or by a component of the network device (such as a line card) is known as the port speed. Port speed is measured in kilobits per second (Kbps), gigabits per second (Gbps), and terabits per second (Tbps). If a port can be configured to multiple speeds, the port is known as a rate-selectable port. Because the port is part of a network device (router or switch) or a network component (such as MPC, MIC) the component is known as a rate-selectable component. For instance, if a Modular Port Concentrator (MPC) supports multiple speeds, it is known as a rate-selectable MPC. If a Modular Interface Card (MIC) supports multiple speeds, it is known as a rate-selectable MIC. The term multi-rate in the name of a component also indicates support for more than one speed.

Rate selectability enables you to configure the port speed either at the port level or at the PIC or MIC level. To configure all ports to operate at the same speed, you configure rate selectability at the MIC or PIC level. To configure different port speeds for each port, you configure rate selectability at the port level, in which case only the ports that are configured are enabled.

When you configure rate selectability at the MIC or PIC level, all the ports of the MIC or PIC that support the configured speed operate at that speed. To prevent switch fabric interface oversubscription–for example, with the Switch Fabric Board SFB or SFB2– and to ensure a guaranteed bandwidth, you can specify the number of active ports that operate at the configured speed. For instance, on a router with SFB, if you want only eight ports of the MIC to operate at 40 Gbps, you can configure the MIC to operate at 40 Gbps and enable the eight ports that you want to operate at that speed. The remaining ports of the MIC are automatically disabled. For example, on MPC8E with MIC-MRATE, you can configure four 100-Gigabit Ethernet interfaces and two 40-Gigabit Ethernet interfaces per MIC. All other interfaces are automatically disabled. Configuring rate selectability at the MIC level helps you configure the operating speed of the MIC easily.

Note

The total port speed of the MIC cannot exceed the forwarding capacity of the Packet Forwarding Engine.

Configuring rate selectability at the port level provides you the flexibility of operating the ports of the MIC at different supported speeds. For example, you can configure four 10-Gigabit Ethernet interfaces on port 0, one 40-Gigabit Ethernet interface on port 1, and one 100-Gigabit Ethernet interface on port 2.

Note

When you configure rate selectability at the port level, ensure that you plug in transceivers to the ports according to the speeds that you configure. For instance, use 4x duplex LC breakout transceivers to configure 10-Gigabit Ethernet interfaces, fiber-optic 40-gigabit QSFP+ transceivers to configure 40-Gigabit Ethernet interfaces, and fiber-optic 100-gigabit QSFP28 transceivers to configure 100-Gigabit Ethernet interfaces.

Rate Selectability on MPC7E-MRATE

MPC7E (MPC7E-MRATE) is a fixed-configuration MPC and is supported on MX240, MX480, MX960, MX2010, and MX2020 routers. MPC7E-MRATE contains two built-in PICs, PIC 0 and PIC 1. Each PIC has six physical ports that support quad small form-factor pluggable plus (QSFP+) transceivers. The default port speed is 10 Gbps for all ports. Each of the six ports of PIC 0 and PIC 1 supports speeds of 10 Gbps and 40 Gbps. However, only ports 2 and 5 on both the PICs support 100 Gbps speed.

MPC7E-MRATE has an aggregate forwarding capacity of 480 Gbps and a forwarding capacity of 240 Gbps on each Packet Forwarding Engine. Oversubscription of Packet Forwarding Engine capacity is not supported. The demand on each Packet Forwarding Engine must be less than or equal to its forwarding capacity. For instance, for MPC7E-MRATE, the demand on each Packet Forwarding Engine must be less than or equal to 240 Gbps.

For information about the naming conventions for interfaces on MPC7E-MRATE MPC, see Interface Naming Conventions for MPC7E-MRATE.

Rate Selectability on MIC-MRATE

MPC8E (MX2K-MPC8E) and MPC9E (MX2K-MPC9E) support two separate slots for MICs as field replaceable units (FRUs). Each of the MIC slots supports only one MIC– MIC-MRATE. MIC-MRATE consists of 12 physical ports that support QSFP+ transceivers and multiple port speeds of 100  Gbps, 40  Gbps, and 10  Gbps. You can configure a port to operate in a specific speed based on your requirement. The default port speed is 10  Gbps for all ports. MIC-MRATE also supports breakout transceivers, which you can use to split a 40-Gigabit Ethernet port into four 10-Gigabit Ethernet ports. MIC-MRATE ports can be split into a maximum of 48 10-Gigabit Ethernet interfaces.

MPC8E has an aggregate forwarding capacity of 960  Gbps and a forwarding capacity of 240  Gbps on each Packet Forwarding Engine. MPC9E has an aggregate forwarding capacity of 1600  Gbps and a forwarding capacity of 400  Gbps on each Packet Forwarding Engine. Oversubscription of Packet Forwarding Engine capacity is not supported. The demand on each Packet Forwarding Engine must be less than or equal to its forwarding capacity. For instance, for MPC8E, the demand on each Packet Forwarding Engine must be less than or equal to 240  Gbps and for MPC9E, the demand per Packet Forwarding Engine must be less than or equal to 400  Gbps.

On MPC8E with MIC-MRATE, you can configure four 100-Gigabit Ethernet interfaces and two 40-Gigabit Ethernet interfaces per MIC. All other interfaces are automatically disabled. On MPC9E with MIC-MRATE, you can configure eight ports as 100-Gigabit Ethernet interfaces and the other ports can be configured only as 40-Gigabit Ethernet Interfaces or 10-Gigabit Ethernet interfaces.

For information about the naming conventions for interfaces on MPC8E and MPC9E, see Interface Naming Conventions for MIC-MRATE.

Rate Selectability on JNP10K-LC2101

JNP10K-LC2101 is a fixed-configuration MPC and is supported on MX10008 routers. JNP10K-LC2101 contains six built-in PICs, PIC 0 to PIC 5. Each PIC has four physical ports that support quad small form-factor pluggable plus (QSFP+) transceivers. The default port speed is 10 Gbps for all ports. Each of the four ports of PIC 0 to PIC 5 supports speeds of 10 Gbps (using breakout cables), 40  Gbps, and 100  Gbps.

MX10008 routers support eight JNP10K-LC2101 MPCs. By default, each JNP10K-LC2101 MPC provides a maximum bandwidth of 1.44  Tbps. JNP10K-LC2101 has six Packet Forwarding Engines, each providing a maximum bandwidth of up to 240  Gbps, which cannot be oversubscribed. You can configure JNP10K-LC2101 to provide an increased bandwidth of 2.4  Tbps. The demand on each Packet Forwarding Engine must be less than or equal to its forwarding capacity. For instance, by default, for JNP10K-LC2101, the demand on each Packet Forwarding Engine must be less than or equal to 240  Gbps. However, if you have configured JNP10K-LC2101 to provide an increased bandwidth of 2.4  Tbps, the demand on each Packet Forwarding Engine must be less than or equal to 480  Gbps.

For information about the naming conventions for interfaces on JNP10K-LC2101 MPC, see Interface Naming Conventions for JNP10K-LC2101.

Rate Selectability on MIC-MACSEC-20GE

The MIC-MACSEC-20GE MIC provides 128-bit and 256-bit MACsec encryption on all the twenty 1GE and on the two 10GE ports in the following hardware configuration:

  • Installed directly on the MX80 and MX104 routers

  • Installed on MPC1, MPC2, MPC3, MPC2E, MPC3E, MPC2E-NG, and MPC3E-NG line cards on the MX240, MX480, and MX960 routers

By default, 128-bit MACsec encryption is supported.

The twenty 1-Gigabit Ethernet SFP ports distributes the ports across PIC0 and PIC1, that are logical PICs on the physical MIC. The two 10-Gigabit Ethernet SFP+ ports are physically located on PIC1. But, the 10-Gigabit interfaces are created by distributing the ports in either of the PICs. For information about the naming conventions for interfaces on MIC-MACSEC-20GE, see Interface Naming Conventions for MIC-MACSEC-20GE.

Note
  • When the pic-mode is changed from 1-Gbps to 10-Gbps or vice versa, the Flexible PIC Concentrator (FPC) in MX240, MX480, MX960 routers and the Forwarding Engine Board (FEB) in MX80, MX104 routers undergoes an automatic bounce or reboot.

  • When the MIC-MACSEC-20GE is operating in the 10-Gbps mode, all the other 1-Gbps ports are disabled.

Guidelines for Configuring Rate Selectability

This topic describes the guidelines to consider when configuring rate selectability at the port level or the PIC or MIC level.

  • If rate selectability is not configured, all ports of the MIC-MRATE MIC and MPC7E-MRATE MPC operate as four 10-Gigabit Ethernet interfaces by default. Therefore, when booting the MPC:

    • If rate selectability is not configured or if invalid port speeds are configured, an alarm is generated to indicate that the configuration is invalid. All the ports operate as four 10-Gigabit Ethernet interfaces.

    • If valid port speeds are configured, the PIC and MIC operate at the configured speed.

  • When you change an existing port speed configuration at the port level, you must reset the MPC7E-MRATE PIC for the configuration to take effect.

    Similarly, when you change an existing port speed configuration at the port level for MPC8E or MPC9E, you must reset the MIC for the configuration to take effect. You can use the request chassis mic mic-slot mic-slot-number fpc-slot fpc-slot-number (offline | online) command to reset the MIC and apply your configuration changes.

    An alarm is generated indicating the change in port speed configuration.

  • When you change an existing port speed configuration with an invalid port speed configuration, an alarm is generated indicating that the port speed configuration is invalid. For example, on the MPC7E-MRATE, if you configure the port speed of port 3 as 100 Gbps, it is an invalid configuration. MPC7E -MRATE supports 100 Gbps only on ports 2 and 5. The MPC continues to operate using the existing port speed configuration or the default port speed.

  • You cannot configure rate selectability at the PIC level and the port level simultaneously. Error messages are displayed when you try to commit such configurations.

  • When you configure rate selectability at the port level, only the configured ports are enabled. Other ports are disabled.

Guidelines for Configuring Rate Selectability for JNP10K-LC2101

This topic describes the guidelines to consider when configuring rate selectability at the port level or the PIC level for JNP10K-LC2101:

  • Each port on the JNP10K-LC2101 MPC supports speeds of 10 Gbps (using breakout cables), 40 Gbps, and 100 Gbps. However, JNP10K-LC2101 MPC does not support bandwidth oversubscription. So, when you configure the ports on all PICs, ensure that the demand on each Packet Forwarding Engine is less than or equal to its forwarding capacity. The default port speed for all PICs is 10G.

  • When you change an existing port speed configuration at the port level, you must reset the PIC for the configuration to take effect. When you change an existing port speed configuration at the PIC level, the JNP10K-LC2101 automatically resets the PIC.

  • When you change the number of active ports using the number-of-ports command, you must reset the PIC for the configuration to take effect. Interfaces are created only for active ports. Only the ports you configure are known as the active ports. The number of active ports enables you to handle bandwidth oversubscription.

    Note

    You cannot configure the number of active ports at the port level. If you attempt to configure the number of active ports at the port level, an error message is displayed.

  • You cannot configure rate selectability at the PIC level and the port level simultaneously. Error messages are displayed when you try to commit such configurations.

  • When you change an existing port speed configuration with an invalid port speed configuration, an alarm is generated indicating that the port speed configuration is invalid. The MPC continues to operate using the existing port speed configuration or the default port speed.

Guidelines for Configuring Rate Selectability for MPC11E

This topic describes the guidelines to consider when configuring rate selectability at the port level or the PIC level for MPC11E:

  • If you do not configure rate selectability at the PIC level using the pic-mode option, then the default port speed is 100 Gbps.

  • If you do not specify the number of active ports using the number-of-ports option, then all the five ports are active by default.

  • When you change the number of active ports using the number-of-ports option, MPC11E automatically resets the PIC. After the PIC comes online, interfaces are created only for the active ports.

  • Ports 1 through 4 on each PIC of the MPC11E MPC supports speeds of 100 Gbps. However, MPC11E MPC does not support bandwidth oversubscription. So, when you configure the ports on all PICs, ensure that the demand on each Packet Forwarding Engine is less than or equal to its forwarding capacity.

  • You cannot configure rate selectability at the PIC level and the port level simultaneously. Error messages are displayed when you attempt to commit the configuration. Also, you cannot configure the number of active ports by using the number-of-ports option at the PIC level and the speed by using the speed option at the port level simultaneously. Error message is displayed when you attempt to commit the configuration.

  • When you change the port configuration at the port level, the interfaces corresponding to the affected port are deleted and then re-created. You need not reboot the MPC for the configuration to take effect. However, if you delete all the port speed configuration, then the MPC is rebooted.

  • When you change an existing port speed configuration with an invalid port speed configuration, an alarm is generated indicating that the port speed configuration is invalid. The MPC continues to operate using the existing port speed configuration or the default port speed.

MX10003 MPC Rate-Selectability Overview

MX10003 MPC supports a Multi-Rate 12xQSFP28 Ethernet Modular Interface Card (MIC) and a fixed-port PIC (6xQSFPP). The MX10003 Packet Forwarding Engine has 6x40GE QSFPP ports on the fixed-port PIC and 12x100GE QSFP28 ports on the MIC. For more information see MX10003 MPC (Multi-Rate). Rate selectability enables you to configure the port speed either at the port level or at the MIC level. To configure all ports to operate at the same speed, you configure rate selectability at the MIC or PIC level. For more information see Configuring Rate Selectability on MX10003 MPC to Enable Different Port Speeds.To configure different port speeds for each port, you configure rate selectability at the port level, in which case only the ports that are configured are enabled. For more information see Configuring Rate Selectability on MX10003 MPC to Enable Different Port Speeds.

The ports on the MX10003 MPC are called rate-selectable or multirate ports as they support multiple port speeds. You can choose to configure all supported ports of the fixed port PIC or the MIC to operate at the same speed or configure all the ports at different supported speeds. However, all the PIC or MIC ports do not support all the port speeds. For example, you can choose to configure:

  • A port in 4x10GE mode using QSFPP-4x10GE optics and 4x10GE breakout cables.

  • A port in 40GE mode using QSFPP optics.

  • A port in 100GE mode using QSFP28 optics.

  • A port in 1GE mode (for the ports that is already operating in 10GE mode only) using QSFPP-4x10GE optics on fixed PIC and non-MacSEC MIC.

Note
  • You can use the port-checker tool to check whether the combination of ports you want to use is valid or not.

  • You can use the Hardware Compatibility Tool to find information about the pluggable transceivers supported on MX10003 router.

The MX10003 MPC supports three Packet Forwarding Engines. The forwarding capacity of each Packet Forwarding Engine is 400Gbps which cannot be oversubscribed.

The MIC supports 12 ports. Each Packet Forwarding Engine is mapped to 4 ports of the MIC. Port 0 through port 3 are mapped to PFE0, port 4 through port 7 are mapped to PFE1, and port 8 through port 11 are mapped to PFE2. The fixed-port PIC supports 6 ports. Each Packet Forwarding Engine is mapped to two ports of the fixed-port PIC. Port 0 and port 1 are mapped to PFE0, port 2 and port 3 are mapped to PFE1, and port 4 and port 5 are mapped to PFE2. You can use the command show chassis pic fpc-slot slot-number pic-slot slot-number to display Packet Forwarding Engine mapping information and port speed information.

Table 1 summarizes the Packet Forwarding Engine mapping and the supported port speeds.

Table 1: Rate Selectability of MX10003 MPC

PIC

Port Number

Port Speed Supported

PIC 0 (Fixed-port PIC)

0–5

40-Gigabit Ethernet

4x10-Gigabit Ethernet

Note: You can configure one or all 10G port operating in 4X10-Gigabit Ethernet mode to operate in 1-Gigabit Ethernet mode.

PIC 1 (Multi-Rate MIC)

0–11

100-Gigabit Ethernet

40-Gigabit Ethernet

4x10-Gigabit Ethernet

Note: On non-MACsec MIC, you can configure one or all the 4X10-Gigabit Ethernet port to 1-Gigabit Ethernet mode.

Starting with Junos OS Release 18.1R1, the non-MACsec MIC on the MX10003 routers support 1-Gigabit Ethernet mode also on 10-Gigabit Ethernet mode ports.

Each of the 100-Gigabit Ethernet or 40-Gigabit Ethernet port can be split to four 10-Gigabit Ethernet ports that can be configured to operate as 1-Gigabit Ethernet port. You can also use 4x10GE LR breakout optics (QSFPP-4X10GE-LR) at the MX10003 end and 1-Gigabit Ethernet EX optics at the remote end. It is only optional to use Juniper optics (SFP-GE40KM) at the remote end, as any vendor's EX (not SX or LX) optics can be used. Refer to Hardware Compatibility Tool for the list of pluggable transceivers supported on MX10003 router.

On MX10003 routers, when the port operates in 10-Gbps speed, you can change the operating speed to 1Gpbs using the configuration speed 1G as follows:

set interfaces interface-name gigether-options speed 1g

Refer speed (Gigabit Ethernet interface) for more details.

Once you commit this configuration, the operating speed of the 10-Gbps port changes to 1-Gbps speed, but the show interface command displays for the field Physical interface (that is, the interface name prefix) as XE /_/ and the Speed Configuration (that is, operating port speed) as 1GE. On fixed-port PIC and non-MACsec MIC, you can configure one or all 10-Gbps port operating in 4X10-Gbps speed to operate in 1-Gbps speed.

1-Gbps speed is only supported in non-autonegotation mode.

Note
  • Any interface operating at 10-Gigabit Ethernet mode can be independently converted to 1-Gigabit Ethernet mode. For example, in multi–rate connections through split cables, when one of the ports operates at 1GE mode, the other three ports can still be configured in 1GE or 10GE mode.

  • The MACsec MIC does not support 1-Gbps speed.

  • The rate selectability at PIC level and port level does not support 1-Gbps speed. But you can configure the port configured at 10-Gbps speed to operate at 1-Gbps speed using the speed (Gigabit Ethernet interface) configuration statement at Gigabit Ethernet interface level.

  • The 1-Gbps operation mode is only supported in non-autonegotiation mode.

  • ISSU is not supported for the interfaces that are configured with 1-Gigabit Ethernet mode. If ISSU upgrade is carried out in 1-Gigabit Ethernet mode, then the behavior is unexpected and traffic loss can be expected. Refer request vmhost software in-service-upgrade for more details.

To view the speed configured for the interface, execute the show interfaces extensive command. The Speed Configuration output parameter in the command output indicates the current operation speed of the interface. If the interface is configured with 1-Gbps speed, then Speed Configuration displays 1G; if the interface is configured with 10-Gbps speed, Speed Configuration displays AUTO.

For example:

In this example, the Speed Configuration output parameter displays 1G, which means the operation speed of xe-0/1/11:0 interface is 1-Gbps speed.

MX10003 MPC has an aggregate forwarding capacity of 1.2 Tbps and a forwarding capacity of 400 Gbps on each Packet Forwarding Engine. Oversubscription of Packet Forwarding Engine capacity is not supported. The demand on each Packet Forwarding Engine must be less than or equal to its forwarding capacity. For more information see, Supported Active Physical Ports for Configuring Rate Selectability to Prevent Oversubscription on MX10003 MPC. For instance, for MX10003 MPC, the demand on each Packet Forwarding Engine must be less than or equal to 400 Gbps.

For example, on the fixed-port PIC, if you configure the port speed on one ports as 40 Gbps or on two port as 40 Gbps, then you can configure the ports on the MIC in one of the following ways:

  • Three 100-Gigabit Ethernet interfaces

  • Two 100-Gigabit Ethernet and two 40-Gigabit Ethernet interfaces

  • Two 100-Gigabit Ethernet and eight 10-Gigabit Ethernet interfaces

The same rule is applicable to all Packet Forwarding Engines independently.

Note

Only the Interface that is already operating at 10GE mode can be configured to operate at 1GE mode using speed (Gigabit Ethernet interface) configuration statement as follows:

set interfaces interface-name gigether-options speed 1g

Table 2 summarizes the port mode configuration at the Packet Forwarding Engine level.

Table 2: PFE Based Port Mode Configuration

Port Speed configuration on PIC1(Gbps)

Port speed configuration on PIC0(Gbps)

100

100

100

100

0

0

100

100

100

10/40

0

0

100

100

100

0

10/40

10/40

100

100

10/40

10/40

10/40

10/40

100

10/40

10/40

10/40

10/40

10/40

10/40

10/40

10/40

0

10/40

10/40

10/40

10/40

10/40

10/40

0

0

Table 3 summarizes the PIC mode configuration.

Table 3: PIC Mode Configuration

Port Speed configuration on PIC1(Gbps)

Port speed configuration on PIC0(Gbps)

100

0

Configure the number of ports to 0.

10

10

40

40

Note the following caveats while configuring rate selectability on the MX10003 MPC:

  • By default, the MX10003 router comes up with the PIC mode where all the interface operates at the same speed of 10-Gbps. That is, by default, both the PICs (PIC 0 and PIC 1) operate at 10-Gbps speed. To use different port speeds, you must first switch to the port mode and then change the default speed.

    To change the default speed, you must select a port and configure a different port speed on it and reset both the PICs for the configuration to take effect. For example, select 40GE or 100GE on PIC 1 and 10GE on PIC 0. For this configuration to take effect, you must reset both PICs.

  • Regardless of the line card— MIC (PIC1) or fixed-port PIC (PIC0) installed —you must configure both the PICs and all the associated ports, under the [edit chassis] hierarchy. Configuring ports on only one of the PICs results in an invalid configuration.

  • The port speed configuration on the fixed-port PIC and the MIC must be homogenous. However, at port level you can configure port speeds in heterogeneous mode. For more information, see Configuring Rate Selectability on MX10003 MPC at Port Level.

    For example, if you want to configure the port speed as 10 Gbps, the port speed of the fixed-port PIC and the MIC should be configured to 10 Gbps. If you want to configure the port speed as 40 Gbps, the port speed of the fixed-port PIC and the MIC should be configured to 40 Gbps. However, if you choose to configure all ports of the MX10003 MPC to operate as 100-Gigabit Ethernet interfaces, the ports on the MIC have to be configured to 100 Gbps and the number-of-ports number-of-active-physical-ports statement on the fixed-port PIC must be set to 0.

  • When you configure rate selectability at the port level, only the configured ports are active. Other ports are disabled.

  • When you choose an existing port speed configuration with an invalid port speed configuration, an alarm is generated indicating that the port speed configuration is invalid.

  • You cannot configure the ports which will oversubscribe the Packet Forwarding Engine. For example, a combination of eleven 100-Gigabit Ethernet interfaces on the MIC and ten 10-Gigabit Ethernet interfaces on the fixed-port PIC will result in an invalid configuration. If you try to commit an invalid configuration, the configuration will get committed. However, the port will not be activated. You can execute the show chassis alarms to display the error message.

  • You cannot configure rate selectability at the PIC level and the port level simultaneously. Error messages are displayed when you try to commit such configurations.

Invalid Port Configuration

You cannot configure the ports which will oversubscribe the Packet Forwarding Engine.

For example, a combination of eleven 100-Gigabit Ethernet interfaces on the MIC and ten 10-Gigabit Ethernet interfaces on the fixed-port PIC will result in an invalid configuration. If you try to commit an invalid configuration, the configuration will get committed. However, the port will not be activated. You can execute the show chassis alarms to display the error message. The valid configuration in this case would be eleven 100-Gigabit Ethernet interfaces on the MIC and eight 10-Gigabit Ethernet interfaces on the fixed-port PIC.

MX204 Router Rate-Selectability Overview

The maximum amount of data that can be transmitted through a port at any given second either by a network device or by a component of the network device (such as a line card) is known as the port speed. Port speed is measured in kilobits per second (Kbps), gigabits per second (Gbps), and terabits per second (Tbps). If a port can be configured to support both single and multiple speeds, the port is known as a rate-selectable port. Because the port is part of a network device (router or switch) or a network component (such as MPC, MIC) the component is known as a rate-selectable component. Rate selectability enables you to configure different port speeds at the port level or at the PIC level.

The MX204 has four rate-selectable ports (referred to a PIC 0 ports) that can be configured as 100-Gigabit Ethernet ports or 40-Gigabit Ethernet port, or each port can be configured as four 10-Gigabit Ethernet ports (by using a breakout cable). The MX204 also has eight 10-Gigabit Ethernet ports (referred to as PIC 1 ports). On PIC 0 and PIC 1, you can configure the 10-Gigabit Ethernet port(s) to operate in 1-Gigabit Ethernet mode (using speed (Gigabit Ethernet interface) command). The four rate-selectable ports supports QSFP28/QSFP+ transceivers, whereas the eight 10-Gigabit Ethernet ports supports SFP+ transceivers. Knowing the exact details of the port speeds for the PICs helps you to choose the speeds to configure on the ports or on the PICs. You can view the port speeds of the PIC by executing show chassis pic command. For more information, see MX204 Router Overview and Supported Active Physical Rate-Selectable Ports to Prevent Oversubscription on MX204 Router.

If your configuration does not comply to the following rules, it is an invalid configuration. In this case, the invalid configuration will not take in to effect and the router stays with the prior configuration:

  • The MX204 routers contains one Packet Forwarding Engine that has a total of four ‘MACs’ (otherwise called as ‘port groups’). Two MACs out of four are pre-configured as 1x100GE each and cannot be changed. The other two MACs can be channelized as one of the following each – either one 100-Gigabit Ethernet ports, or three 40-Gigabit Ethernet ports (or one or more ports can be channelized down to 10-Gigabit Ethernet ports too), or 12 10-Gigabit Ethernet ports.

    Note
    • One Gigabit Ethernet port can also be substituted for 10-Gigabit Ethernet ports.

    • You cannot use the same MAC (or ’port groups’) on both PICs.

  • Two modes - PIC and port modes are supported and both PICs must be running in same mode:

    • PIC mode is the default mode that shares MAC across PICs, and all ports on both PICs run at the same speed. On MX204 routers contain 24 10-Gigabit Ethernet ports as all 4 ports on PIC 0 are channelized down to four 10-Gigabit Ethernet ports (16) and using all eight 10-Gigabit Ethernet ports on PIC 1.

    • Port mode allows you to run ports at different speeds.

    • You cannot spread or share MACs across PICs.

Note
  • By default, the MX204 router comes up with the PIC mode where all the interface operates at the same speed of 10-Gbps. that is, by default, both the PICs (PIC 0 and PIC 1) operate at 10-Gbps speed. To use different port speeds, you must first switch to the port mode and then change the default speed.

    To change the default speed, you must select a port and configure a different port speed on it and reset both the PICs for the configuration to take effect. For example, select 40GE or 100GE on PIC 0 and 10GE on PIC 1. For this configuration to take effect, you must reset both PICs.

  • Not all port combinations will work. So, it is recommended to use the port-checker tool to check whether the combination of ports you want to use is valid or not.

  • You can use the Hardware Compatibility Tool to find information about the pluggable transceivers supported on MX204 router.

The MX204 router supports two types of rate selectability configuration options:

  • PIC Level Configuration: To configure all ports to operate at the same speed, you configure rate selectability at the PIC level.

  • Port Level Configuration: To configure different port speeds for each port, you configure rate selectability at the port level, in which case only the ports that are configured are enabled.

To configure all ports to operate at the same speed, configure rate selectability at the PIC level, in which case you cannot configure the speed of individual ports. To configure rate selectability at the PIC level, use the pic-mode statement and specify the port speed. To configure different port speeds for each port, configure rate selectability at the port level, in which case only the ports that are configured are enabled. To configure rate selectability at the port level, use the speed statement to specify the speed of individual ports.

The examples below show the sample CLI command output of the port speed capability of the 4-port PIC 0 with QSFP+ transceivers and the 8-port PIC 1 with SFP+ transceivers on the MX204 router.

Table 4 summarizes the rate selectability of the MX204 routers.

Table 4: Rate Selectability of MX204 Routers

PIC

Port Number

Port Speed Supported

PIC 0

0–3

100-Gigabit Ethernet

40-Gigabit Ethernet

4x10-Gigabit Ethernet

Note:

  • Default port speed is 4x10 Gigabit Ethernet.

  • Supports 1–Gbps speed on 10 Gigabit Ethernet ports.

PIC 1

0–7

10 Gigabit Ethernet

Note: Supports 1–Gbps speed on 10 Gigabit Ethernet ports.

Starting with Junos OS Release 18.1R1, the 10-Gbps port can operate in 1-Gbps mode also.

Each of the four 100-Gigabit Ethernet or 40-Gigabit Ethernet port can be split to four 10-Gigabit Ethernet ports that can be configured to operate as 1-Gigabit Ethernet port. You can also use 4x10GE LR breakout optics (QSFPP-4X10GE-LR) at the MX204 end and 1-Gigabit Ethernet EX optics at the remote end. It is only optional to use Juniper optics (SFP-GE40KM) at the remote end, as any vendor's EX (not SX or LX) optics can be used. Refer to Hardware Compatibility Tool for the list of pluggable transceivers supported on MX204 router.

MX204 router also support 1-Gigabit Ethernet port on the fixed 10-Gigabit Ethernet SFPP ports with 1GE SFPs in it.

On MX204 routers, when the port is operating in 10-Gbps speed, you can change the operating speed to 1Gpbs using the configuration statement Speed 1G as follows:

set interfaces interface-name gigether-options speed 1g

Refer speed (Gigabit Ethernet interface) for more details.

Once you commit this configuration, the operating speed of the 10-Gbps port changes to 1-Gbps speed, but the show interface command displays for the field Physical interface (that is, the interface name prefix) as XE /_/ and the Speed Configuration (that is, operating port speed) as 1GE.

On MRATE PIC, each channel per port can be configured individually as 1-Gigabit Ethernet port.

Note
  • The interface name prefix must be xe.

  • The rate selectability at PIC level and port level does not support 1-Gbps speed. But you can configure the port configured at 10-Gbps speed to operate at 1-Gbps speed using the speed (Gigabit Ethernet interface) configuration statement at Gigabit Ethernet interface level.

  • The 1-Gbps operation mode is supported with speed 1g configuration. For optics other than SFP-T, in 1G mode, the peer interfaces must be configured to non-autonegotiation mode.

To view the speed configured for the interface, execute the show interfaces extensive command. The Speed Configuration output parameter in the command output indicates the current operation speed of the interface. If the interface is configured with 1-Gbps speed, then Speed Configuration displays 1G; if the interface is configured with 10-Gbps speed, Speed Configuration displays AUTO.

For example:

In this example, the Speed Configuration output parameter displays 1G, which means the operation speed of xe-0/1/11:0 interface is 1-Gbps speed.

User-Configurable Rate Selectability of MX204 Routers

You can also configure rate selectability on MX204 routers.

Table 5 summarizes the user-configurable rate selectability of MX204 routers.

Table 5: Configurable Rate Selectability of MX204 Router

Port Speed Configuration on PIC 0 (Gbps)

Port Speed Configuration on PIC 1 (Gbps)

100

0

Configure the number of active ports to 0.

10

10

40

0

Configure the number of active ports to 0.

Only the Interface that is already operating at 10GE mode can be configured to operate at 1GE mode using speed (Gigabit Ethernet interface) configuration statement as follows:

set interfaces interface-name gigether-options speed 1g

Note

The MX204 router does not support heterogeneous mode. That is, in PIC mode if 40-Gbps or 100-Gbps speed is configured on PIC 0, then the number-of-ports on PIC 1 must be configured to 0 only.

Maximum number of 10/40/100GE ports Configurable at PIC and Port Mode

Following table summarizes the maximum number of 10/40/100 Gigabit Ethernet ports per PIC configurable at PIC and port levels:

Table 6: Maximum number of 10/40/100 Gigabit Ethernet ports Configurable at PIC and Port Level

Maximum Ports

Maximum Ports configurable at PIC Mode (on both PIC0 and PIC1)

Maximum Ports Configurable at Port Mode (on both PIC0 and PIC1)

10/1 Gigabit Ethernet Ports

24

Which means 16 ports from PIC 0 and 8 Ports from PIC 1.

20

Which means 12 ports from PIC 0 and 8 Ports from PIC 1.

40 Gigabit Ethernet Ports

4

Only 4 ports from PIC 0 as PIC 1 supports only 10 Gbps Speed.

4

100 Gigabit Ethernet Ports

4

Only 4 ports from PIC 0 as PIC 1 supports only 10 Gbps Speed.

4

Port Configuration - PIC Level

On PIC 0, if each of the four ports is configured to operate at 100-Gbps speed, then you must configure all the 8 ports at PIC 1 to 0 (using number-of-ports statement). On PIC 0, if ports 0, 1, and 2 are set to 100-Gbps, and port 3 is set to 10-Gbps or 40-Gbps, then you should configure all the 8 ports at PIC 1 to 0 (using number-of-port statement), and so on as listed in the below table.

The following table only lists few valid combination of port speeds on PIC 0 and PIC1 of MX204 router. You are not limited to configure only the below mentioned example port configurations. For more valid port configuration values, refer port-checker tool.

Table 7: Port Configuration at PIC Level in MX204 Routers

Port Mode

PIC 0

PIC 1

100

100

100

100

0

Configure the number of active ports to 0.

100

100

100

10/40

0

Configure the number of active ports to 0.

100

100

10/40

10/40

10

10

10

10

10

10

10

10

100

10/40

10/40

10/40

10

10

10

10

10

10

10

10

10/40

10/40

10/40

10/40

0

Configure the number of ports to 0.

PIC Mode

PIC 0 (with four rate-selectable ports)

PIC 1 (with eight 10-Gigabit Ethernet ports)

100

100

100

100

0

Configure the number of active ports to 0.

40

40

40

40

0

Configure the number of active ports to 0.

10

10

10

10

10

Configure all the eight 10-Gigabit Ethernet ports to 10.

Note

Only the Interface that is already operating at 10GE mode can be configured to operate at 1GE mode using speed (Gigabit Ethernet interface) configuration statement as follows:

set interfaces interface-name gigether-options speed 1g

MPC10E-15C-MRATE Rate-Selectability Overview

MPC10E-15C-MRATE (15x100G) is a fixed-configuration Modular Port Concentrator (MPC) for MX240, MX480, and MX960 routers, that is capable of delivering up to 1.5T per-slot bandwidth. It consists of three PFE complexes per MPC and each PFE is capable of delivering up to 500G throughput. It supports three PICs per MPC, one PIC per PFE. Each PIC hosts five QSFP28 (5xQSFP28) ports that supports 4x10-Gbps, 40-Gbps, and 100-Gbps speeds using QSFP+, QSFP28 optics types. The 4x10-Gbps speed is supported using breakout cables.

For more information, see Configuring Rate Selectability on MPC10E-15C-MRATE to Enable Different Port Speeds. To configure different port speeds for each port, you configure rate selectability at the port level, in which case only the ports that are configured are enabled. For more information, see Configuring Rate Selectability on MPC10E-15C-MRATE to Enable Different Port Speeds.

The ports on the MPC10E-15C-MRATE are called rate-selectable or multirate ports as they support multiple port speeds. You can choose to configure all ports in a PIC to operate at the same speed or configure all the ports at different supported speeds.

In MPC10E-15C-MRATE, you can choose to configure:

  • A port in 4x10-Gigabit Ethernet mode using QSFPP-4x10-Gigabit Ethernet optics and 4x10-Gigabit Ethernet breakout cables.

  • A port in 40-Gigabit Ethernet mode using QSFPP optics.

  • A port in 100-Gigabit Ethernet mode using QSFP28 optics.

Note
  • When you change the speed at PIC level, the PIC restarts automatically with the new configured speed.

  • When you change the speed of a particular port explicitly (by port-level speed configuration), then only that particular port is reset automatically and other ports in that PIC remain unaffected.

The MPC10E-15C-MRATE supports three Packet Forwarding Engines (PFEs). The forwarding capacity of each Packet Forwarding Engine is 500Gbps which cannot be oversubscribed. The MPC10E-15C-MRATE supports 15 ports. Each PFE is mapped to 5 ports of the PIC. Use the command show chassis pic fpc-slot slot-number pic-slot slot-number to display PFE mapping information and port speed information.

Table 8 summarizes the Packet Forwarding Engine mapping and the supported port speeds.

Table 8: Rate Selectability of MPC10E-15C-MRATE

PIC

Port Number

Port Speed Supported

Remarks

PIC 0 (or PFE 0)

0-4

40-Gigabit Ethernet

4x10-Gigabit Ethernet

100-Gigabit Ethernet

  • 4x10GE support using QSFPP-4x10GE breakout optics.

  • 1x40GE support using QSFPP optics.

  • 1x100GE support using QSFP28 optics.

Note: By default, all the active ports operate in 100-Gigabit Ethernet mode.

PIC 1 (or PFE 1)

0-4

40-Gigabit Ethernet

4x10-Gigabit Ethernet

100-Gigabit Ethernet

PIC 2 (or PFE 2)

0-4

40-Gigabit Ethernet

4x10-Gigabit Ethernet

100-Gigabit Ethernet

To view the speed configured for the interface, execute the show interfaces extensive command. The Speed output parameter in the command output indicates the current operation speed of the interface.

For example:

In this example, the Speed output parameter displays 100Gbps, which means the operation speed of et-4/1/0 interface is 100-Gbps.

Note the following important information while configuring rate selectability on the MPC10E-15C-MRATE:

  • By default, the MPC10E-15C-MRATE comes up with the PIC mode where all the interface operates at the same speed of 100-Gbps. That is, by default, all the PICs (PIC 0, PIC 1, and PIC 2) operate at 100-Gbps speed.

  • When you configure rate selectability at the port level, only the configured ports are created in that PIC. Other ports are not created.

  • You cannot configure rate selectability at the PIC level and the port level simultaneously. Commit fails when you try to apply such configuration.

User-Configurable Rate Selectability of MPC10E-15C-MRATE

You can also configure rate selectability on MPC10E-15C-MRATE.

Table 9 summarizes the user-configurable rate selectability of MPC10E-15C-MRATE.

Table 9: Port speed capability of MPC10E-15C-MRATE

PIC

Configurable Port Profiles

PIC level Profile

Port level Profile

10G

40G

100G

PIC 0 (5xQSFP28 PIC)

Yes

Yes

Yes

Yes

PIC 1 (5xQSFP28 PIC)

Yes

Yes

Yes

Yes

PIC 2 (5xQSFP28 PIC)

Yes

Yes

Yes

Yes

Note

Different PICs in the MPC10E-15C-MRATE can operate at different speeds. That is, PIC speed at one PIC has no bearing on the other PICs in the MPC.

MPC10E-10C-MRATE Rate-Selectability Overview

MPC10E-10C-MRATE (10x100G) is a fixed-configuration Modular Port Concentrator (MPC) for MX240, MX480, and MX960 routers, that is capable of delivering up to 1Tbps per-slot bandwidth. It consists of two Packet Forwarding Engine (PFE) complexes per MPC and each PFE is capable of delivering up to 500G throughput. It supports two PICs per MPC, one PIC per PFE. Each PIC hosts five QSFP28 (5xQSFP28) ports that supports 4x10-Gbps, 40-Gbps, and 100-Gbps speeds using QSFP+, QSFP28 optics types. The 4x10-Gbps speed is supported using breakout cables.

For more information, see Configuring Rate Selectability on MPC10E-10C-MRATE to Enable Different Port Speeds. To configure different port speeds for each port, you configure rate selectability at the port level, in which case only the ports that are configured are enabled. For more information, see Configuring Rate Selectability on MPC10E-10C-MRATE to Enable Different Port Speeds.

The ports on the MPC10E-10C-MRATE are called rate-selectable or multirate ports as they support multiple port speeds. You can choose to configure all ports in a PIC to operate at the same speed or configure all the ports at different supported speeds.

In MPC10E-10C-MRATE, you can choose to configure:

  • A port in 4x10-Gigabit Ethernet mode using QSFPP-4x10-Gigabit Ethernet optics and 4x10-Gigabit Ethernet breakout cables.

  • A port in 40-Gigabit Ethernet mode using QSFPP optics.

  • A port in 100-Gigabit Ethernet mode using QSFP28 optics.

Note
  • When you change the speed at PIC level, the PIC restarts automatically with the new configured speed.

  • When you change the speed of a particular port explicitly (by port-level speed configuration), then only that particular port is reset automatically and other ports in that PIC remain unaffected.

The MPC10E-10C-MRATE supports two Packet Forwarding Engines. The forwarding capacity of each Packet Forwarding Engine is 500Gbps which cannot be oversubscribed. The MPC10E-10C-MRATE supports 10 ports. Each PFE is mapped to 5 ports of the PIC. Use the command show chassis pic fpc-slot slot-number pic-slot slot-number to display PFE mapping information and port speed information.

Table 10 summarizes the Packet Forwarding Engine mapping and the supported port speeds.

Table 10: Rate Selectability of MPC10E-10C-MRATE

PIC

Port Number

Port Speed Supported

Remarks

PIC 0 (or PFE 0)

0-4

40-Gigabit Ethernet

4x10-Gigabit Ethernet

100-Gigabit Ethernet

  • 4x10GE support using QSFPP-4x10GE breakout optics.

  • 1x40GE support using QSFPP optics.

  • 1x100GE support using QSFP28 optics.

Note: By default, all the active ports operate in 100-Gigabit Ethernet mode.

PIC 1 (or PFE 1)

0-4

40-Gigabit Ethernet

4x10-Gigabit Ethernet

100-Gigabit Ethernet

To view the speed configured for the interface, execute the show interfaces extensive command. The Speed output parameter in the command output indicates the current operation speed of the interface.

For example:

In this example, the Speed output parameter displays 100Gbps, which means the operation speed of et-4/1/0 interface is 100-Gbps.

Note the following important information while configuring rate selectability on the MPC10E-10C-MRATE:

  • By default, the MPC10E-10C-MRATE comes up with the PIC mode where all the interface operates at the same speed of 100-Gbps. That is, by default, all the PICs (PIC 0 and PIC 1) operate at 100-Gbps speed.

  • When you configure rate selectability at the port level, only the configured ports are created in that PIC. Other ports are not created.

  • You cannot configure rate selectability at the PIC level and the port level simultaneously. Commit fails when you try to apply such configuration.

User-Configurable Rate Selectability of MPC10E-10C-MRATE

You can also configure rate selectability on MPC10E-10C-MRATE.

Table 11 summarizes the user-configurable rate selectability of MPC10E-10C-MRATE.

Table 11: Port speed capability of MPC10E-10C-MRATE

PIC

Configurable Port Profiles

PIC level Profile

Port level Profile

10G

40G

100G

PIC 0 (5xQSFP28 PIC)

Yes

Yes

Yes

Yes

PIC 1 (5xQSFP28 PIC)

Yes

Yes

Yes

Yes

Note

Different PICs in the MPC10E-10C-MRATE can operate at different speeds. That is, PIC speed at one PIC has no bearing on the other PICs in the MPC.

PTX10003 Router Rate-Selectability Overview

PTX10003 Packet Transport Routers feature flexible interface configuration options with universal multi-rate double-density Quad Small Form-factor Pluggable (QSFP-DD) optics. The PTX10003-80C port panel has 40 physical ports and the PTX10003-160C port panel has 80 physical ports. The physical ports are in groups of five QSFP-DD ports. You can configure different data rates for each port group as long as the total throughput for the group does not exceed 1 Tbps. Any port can be used as a 100-Gigabit Ethernet interface, 40-Gigabit Ethernet interface, or 10-Gigabit Ethernet interface. You choose the speed by plugging in the appropriate transceiver.

Note

The center port in each port group (port 2 and port 7) cannot support 1x200 Gbps. To configure a 200 Gbps data rate for those ports, you’ll need to configure them as 2x100 Gbps. For more details, see Understanding QSFP-DD Interfaces and Configurations.

You can channelize the Gigabit Ethernet interfaces on PTX10003 routers to create multiple independent Gigabit Ethernet interfaces and then use breakout cables to connect the channelized ports to other servers, storage devices, and routers. Here’s the allowable channelization configurations for the optical transceivers supported by the PTX10003:

QSFP Transceiver

Native Port Speeds

Channelization Options

QSFP28-DD

1x200 Gbps

2x100 Gbps

8x25 Gbps

QSFP28

1x100 Gbps

4x25 Gbps

QSFP+

1x40 Gbps

4x10 Gbps

4x10 Gbps

Note

For more details about supported transceivers and cable specifications, see the PTX10003 Packet Transport Router Hardware Guide .

By default, all PTX10003 QSFP-DD interfaces are configured for a data rate of 2x100 Gbps. The interface names appear in the et-fpc/pic/port:channel format.

The port speed can be configured at the PIC-level. To view the port speed capability of a logical PIC, issue the show chassis pic fpc-slot slot-number pic-slot slot-number command.

To channelize a port:

  1. Issue the following command to set the port speed: set chassis fpc slot-number pic pic-number port port-number number-of-subports [1 | 2| 4  |8] speed [10G | 40G | 100G |200G |400G]

    For example, to configure the second port in the first port group as a 1x40 Gbps interface, issue the set chassis fpc 0 pic 0 port 1 number-of-subports 1 speed 40g command.

  2. Type the commit command.

    After you commit this configuration, the second port in PIC 0 will operate at 1x40 Gbps.

    Note

    When a port speed and sub-port-number are configured, the configured values override the default port speed for the transceiver. If you try to configure a port speed that is not supported by the transceiver, the port will be disabled. If there isn’t a port speed configured on a valid optical port, the PTX10003 uses a default port speed of 2x100 Gbps. Also, if number-of-subports is not configured, a 1x 40G | 100G |200G |400G] data rate is assumed. A 1x10G sub-port is not supported.

  3. Issue the following Junos OS Evolved command to configure the channel speed for a port:

    set chassis fpc slot-number port port-number channel-speed speed where the channel speed can be set to 10G or 25G. For example,

    • For 200-Gigabit Ethernet transceivers, you can set the channel speed to 100G or 25G,

    • For 100-Gigabit Ethernet transceivers, you can only set the channel speed to 25G.

    • For 40-Gigabit Ethernet transceivers, you can only set the channel speed to 10G.

    Note

    There is no commit check when channelizing a port.

    When a port is channelized, the interface name has a colon followed by the port channel to signify the four separate channels. For example, on a PTX10003 with port 2 on PIC 1 configured as four 25-Gigabit Ethernet ports, the interface names are et-0/1/2:0, et-0/1/2:1, et-0/1/2:2, and et-0/1/2:3.

Release History Table
Release
Description
Starting with Junos OS Release 18.1R1, the non-MACsec MIC on the MX10003 routers support 1-Gigabit Ethernet mode also on 10-Gigabit Ethernet mode ports.
Starting with Junos OS Release 18.1R1, the 10-Gbps port can operate in 1-Gbps mode also.