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Fabric-Plane-Management-on-MX10004 and MX10008-Devices

SUMMARY 

The MX10004 router has four slots and MX10008 router has eight slots for the line cards that can support a maximum of 768 100-Gigabit Ethernet ports (4x100), 192 40-Gigabit Ethernet ports, 192 100-Gigabit Ethernet ports, or 192 400-Gigabit Ethernet ports with line card slots 0-7 that combine Packet Forwarding Engine (PFE) and Ethernet interfaces enclosed in a single assembly.

There are two models of SFBs: the JNP10004-SF or JNP10008-SF and the JNP10004-SF2 or JNP10008-SF2. SFBs installed must be of the same model type in a running chassis. On both SF and SF2 models, the SFB has eight connectors that connect to one of the eight line cards.

MX10004 and MX10008 devices support the following line cards:

  • MX10K-LC2101—The MX10K-LC2101 line card provides a maximum bandwidth of 2.4Tbps and has six Packet Forwarding Engines (PFEs), each providing a maximum bandwidth of up to 400 Gbps.
  • MX10K-LC480—The MX10K-LC480 line card is a Cx;7 configuration MPC with 48 ports. Each port supports a speed of 10 Gbps or 1 Gbps, providing the line card a maximum bandwidth of 480 Gbps. The MX10K-LC480 has two PFEs, each providing a maximum bandwidth of up to 240 Gbps.
  • MX10K-LC9600—The MX10K-LC9600 is a fixed configuration 24-port line card, which provides a line rate throughput of 9.6 Tbps. The line card has twenty-four QSFP-DD ports, each capable of supporting a maximum speed of 400 Gbps. The line card has 12 Packet Forwarding Engines, each providing a maximum bandwidth of 800 Gbps.
  • Note: In a MX10008 router if you want to install MX10K-LC9600 line card you must install all the six JNP10008-SF2s to achieve 153.6Tbps (bi-directional) switching capacity. The MX10K-LC9600 line cards. are not compatible with the JNP10008-SFs. For details, see MX10008 Hardware Guide.

This topic discusses the fabric plane management on these line cards.

Fabric Plane Management on JNP10K-LC2101 and JNP10K-LC480

MX10K-LC2101 and MX10K-LC480 are fixed-configuration MPC that provides increased port density and performance to MX10008 devices. MX10K-LC2101 and MX10K-LC480 plugs into the chassis and provides the fabric interface.

An MX10008 devices has six Switch Fabric Boards (SFBs). MX10K-LC2101 has six Packet Forwarding Engines (PFE). Each PFE has 24 connections to the fabric (24 planes, or 4 connections per SFB).

The following Table 1 provides information about MX10K-LC2101, MX10K-LC480, and Switch Fabric Boards.

Table 1: Line card support on SFB and SFB2

Line Cards

Switch Fabric Boards Supported

Packet Forwarding Engines (PFEs)

Fabric Planes

Fabric Redundancy

MX10K-LC2101

SFB and SFB2

6 PFE

24 (SFB), 12 (SFB2)

Yes (5+1 for SFB and SFB2)

MX10K-LC480

SFB and SFB2

2 PFE

24 (SFB), 12 (SFB2)

Yes (5+1 for SFB and SFB2)

MX10K-LC2101 and MX10K-LC480 line cards with SFB2 support 12 planes. In case of one SFB2 failure, the line rate is achieved with 10 planes.

The MX10008 SFB also supports fabric hardening. Fabric hardening is the process of controlling bandwidth degradation to prevent null route. The following key CLI commands are available for fabric hardening:

  • set chassis fpc slot-number fabric bandwidth-degradation percentage—Configures the FPC to take a specific action once bandwidth degradation reaches a certain percentage to avoid causing a null route in the chassis.

  • set chassis fabric degraded detection-enable—Enables detection of an FPC with degraded fabric.

  • set chassis fabric degraded action-fpc-restart-disable—Disables line card restarts to limit recovery actions from a degraded fabric condition.

In MX10008 SFBs, fabric fault handling is supported per plane. Fabric fault handling per plane results in increased granularity, which helps identify, isolate, and repair faults. If an SFB has a single faulty plane, the other three planes can continue to operate. There is no need to take the entire SFB offline. For example, if a plane encounters a training failure error, the line card isolates that faulty plane; while the other planes continue to operate. Also, any cyclic redundancy check (CRC) errors on any link on the SFB are indicated on the plane, not on SFB.

Fabric Bandwidth Support on MX10004 and MX10008 Devices with JNP10004-LC480 Line Cards and SF2 SFBs

Support for 4+2 active fabric redundancy on MX10004 and MX10008 devicez supporting JNP10004-LC480 line cards. If other line cards are present on the MX devices that have only four SFBs (SF2), traffic drop is noticed on the other line cards except JNP10004-LC480.

In JNP10004-LC2101 line card, approximately 87.96Gpbs drop in speed is noticed if one SFB goes down.

In LC9600, approximately 273.32Gbps drop in speed is noticed if one SFB goes down.

Table 2: Fabric bandwidth available on MX10004 and MX10008 with SF2 SIBs

No of

Active

SIBS

Delivered Payload Fabric bandwidth Supported WAN Traffic

Per PFE

Per MPC

Per PFE Per LC
1 80 Gbps 160 Gbps 132 Gbps 66 Gbps
2 160 Gbps 320 Gbps 260 Gbps 130 Gbps
3 240 Gbps 480 Gbps 383 Gbps 192 Gbps
4 320 Gbps 640 Gbps 480 Gbps 240 Gbps
5 400 Gbps 800 Gbps 480 Gbps 240 Gbps
6 480 Gbps 960 Gbps 480 Gbps 240 Gbps

Fabric Plane Management on MX10K-LC9600 and SFB2 (Model Number: JNP10008-SF2)

MX10K-LC9600 is a fixed-configuration MPC which provides a line rate throughput of 9.6 Tbps. MX10K-LC9600 is supported on MX10008. MX10K-LC9600 supports Switch Fabric Boards (SFB)2 (Model Number: JNP10008-SF2) only. MX10008 routers support either SFB or SFB2. The first SFB that powers on determines the fabric type of the system. Smooth upgrade from SFB (JNP10008-SF) to SFB2 is not supported in MX10008 routers. You can manually upgrade between SFB and SFB2.

The following Table 3 provides information about MX10K-LC9600 and Switch Fabric Boards.

Table 3: MX10K-LC9600 line card support on SFB and SFB2

Line Cards

Switch Fabric Boards Supported

Packet Forwarding Engines (PFEs)

Fabric Planes

Fabric Redundancy

MX10K-LC9600

SFB2

12 PFE

12

MX10KLC9600 requires all six SFB2s to support the line rate (fabric redundancy is not supported).

MX10008 devices with SFB2 support interoperability of line cards: MX10K-LC9600, MX10K-LC2101, and MX10K-LC480.

MX10008 SFB2s supports the following:

  • Fabric fault handling: Supported per plane. Fabric fault handling per plane results in increased granularity, which helps identify, isolate, and repair faults.
  • Fabric hardening: Supports controlling bandwidth degradation to prevent null route.