PTX10016 System Overview
The Juniper Networks PTX10000 line of packet transport routers bring physical and virtual innovations to the service provider core network. These next-generation routers help network operators achieve their business goals while effectively handling current and future traffic demands.
PTX10016 Packet Transport Router Description
The Juniper Networks PTX10016 Packet Transport Router provides cloud and data center operators with the highest levels of scale and throughput. The larger of the PTX10000 line of routers, the PTX10016 can provide 48 terabits per second (Tbps) of throughput and 32 Bpps of forwarding capacity in a 21-rack-unit (21-U) chassis. PTX10016 has 16 slots for line cards that allow for a smooth transition from 10-Gigabit Ethernet and 40-Gigabit Ethernet networks to 100-Gigabit Ethernet high-performance networks. Table 1 shows the supported port densities.
Table 1: PTX10016 Port Densities
The PTX10016 can be deployed in various network designs and fabrics, including:
Label-Switched core routing
The PTX10016 is available in both base and redundant configurations for both AC and DC operations. All systems feature front-to-back airflow, which is also known as airflow out (AFO).
This topic covers:
Benefits of the PTX10016 Router
System capacity—The PTX10016 packet transport router has a 21 RU form factor and supports 48 Tbps per chassis or 3 Tbps per slot, with support for up to 480 100-Gigabit Ethernet interfaces, 576 40-Gigabit Ethernet ports, or 2304 10-Gigabit Ethernet ports in a single chassis.
Full-scale IP and MPLS routing—PTX10016 delivers the distributed peering scale of 2.9 million forwarding information bases (FIBs) and 30 million routing information bases (RIBs) (also known as forwarding tables, and routing tables, respectively), 3000 OSPF adjacencies, and 4000 BGP sessions that are required to match expanding traffic demands.
Source Packet Routing in Networking (SPRING)—SPRING on PTX10016 provides additional flexibility per packet source. SPRING provides network path and node protection to support MPLS fast reroute (FRR) mechanisms, enhanced network programmability, Operation, Administration, and Maintenance (OAM) functionality, simplified network signaling, load balancing, and traffic engineering functions.
Always-on infrastructure base—The PTX10016 is engineered with full hardware redundancy for cooling, power, switch fabric, and host subsystems—Routing and Control Boards (RCBs)—allowing service providers to meet stringent service-level agreements across the core.
Nondisruptive software upgrades—The Junos operating system (Junos OS) on the PTX10016 supports high availability (HA) features such as graceful Routing Engine switchover (GRES), and nonstop active routing (NSR) providing software upgrades and changes without disrupting network traffic.
The PTX10016 is 21 U tall. Two PTX10016 chassis can fit in a standard 42-U rack with adequate cooling and power. All key PTX10016 components are field-replaceable units (FRUs). Figure 1 illustrates the components visible from the front of the chassis, Figure 2 illustrates the components that are visible from the rear of the chassis, and Figure 3 illustrates the components that are internal to the chassis.
Routing and Control Boards
Installation holes for the front panel
Status LED panel
Line card slots 0-15 (numbered top to bottom)
AC or DC power supplies
Fan trays with redundant fans
Protective earthing terminal
Fan tray controllers
Switch Interface Boards (SIBs)
Routing and Control Board
TheRCB (see Figure 4) contains a Routing Engine and is responsible for the system management
and system control in the PTX10016. See PTX10000 Routing and Control Board Description. RCBs are FRUs that are installed in the front of the chassis in
the slots labeled
CB1. RCB contains Precision Time Protocol (PTP) ports and four Media
Access Control Security (MACsec) capable ports. See PTX10016 Components and Configurations. The base configuration
has a single RCB; the fully redundant configuration has two RCBs.
The PTX10016 features 16 horizontal line card slots and supports
line rate for each line card. The line cards combine a Packet Forwarding
Engine (PFE) and Ethernet interfaces enclosed in a single assembly.
The PTX10000 line card architecture is based on a number of identical,
independent PFE slices, each with 500-Gbps full-duplex throughput.
Line cards are FRUs that can be installed in the line card slots labeled
15 (top to bottom) on the
front of the router chassis. All line cards are hot-removable and
The PTX10016 supports the following line card models:
PTX10K-LC1101, a 30 port 100-Gigabit or 40-Gigabit Ethernet QSFP28 line card. By default, the interfaces are created with 100-Gbps port speed. If you plug in a 40-Gigabit or 4x10 Gigabit transceiver, then you have to configure the appropriate port speed manually. Each of the 40-Gigabit ports can be configured as either a native 40-gigabit port or four 10-Gigabit ports using a breakout cable. With breakout cables, the line card supports a maximum of 120 logical 10-Gigabit Ethernet ports.
PTX10K-LC1102, a 36-port 40-Gigabit Ethernet line card that supports QSFP+ transceivers. Twelve out of the 36 ports on this line card also support the 100-gigabit QSFP28 transceivers . Each of the 40-Gigabit QSFP+ can be configured as either a native 40-Gigabit port or as four 10-Gigabit Ethernet ports by using a breakout cable. Thus, with breakout cables, the line card supports a maximum of 144 logical 10-Gigabit Ethernet ports.
PTX10K-LC1104, a 6-port coherent dense wavelength-division multiplexing (DWDM) with MACsec. The line card features built-in optics that support flexible rate modulation at 100 Gbps, 150 Gbps, and 200 Gbps speeds.
PTX10K-LC1105–a 30-port QSFP28 line card that can be configured as 100-Gigabit Ethernet or 40-Gigabit Ethernet. The PTX10K-LC1105 line card supports MACsec security features.
See Figure 5 for an example of a PTX10000 line card.
Five SIBs provide the necessary switch fabric to a base configuration PTX10016 (see Figure 6). A sixth SIB is available in the redundant configuration to provide n+1 redundancy. SIBs are installed between the line cards and the fan trays inside the chassis. Each PTX10016 SIB has 16 connectors that match to a line card slot, eliminating the need for a backplane. When all six SIBs are installed, the PTX10016 has a net switching capacity of 96 Tbps. See PTX10016 Switch Interface Board Description.
The cooling system in a PTX10016 consists of two hot-removable and hot-insertable FRU fan trays (see Figure 7) and two fan tray controllers (see Figure 8). Each fan tray contains 21 fans. The fan trays install vertically on the rear of the chassis and provide front-to-back chassis cooling. See PTX10016 Cooling System and Airflow.
Power supplies for the PTX10016 router are fully redundant, load-sharing, and hot-removable and hot-insertable FRUs. Each PTX10016 router with a base configuration has five power supplies; redundant configurations hold a maximum of ten AC, high-voltage alternating current (HVAC), DC, or high-voltage direct current (HVDC) power supplies. Each power supply has an internal fan for cooling. See Figure 9 through .Figure 12 .
Do not mix power supply models in the same chassis in a running environment. DC and HVDC can coexist in the same chassis during the hot swap of DC for HVDC.
Table 2 provides an overview of the differences among the power supplies.
Table 2: Power Supply Overview
Power Supply Model
Standard or enhanced
AC, HVAC, or HVDC
5000 W, single feed; 5500 W dual feed
Standard or enhanced
2750 W, single feed; 5500 W dual feed
The Juniper Networks PTX10000 line of Packet Transport Routers run Junos OS, which provides Layer 3 routing services. The same Junos OS code base that runs on the PTX10000 line of routers also runs on all Juniper Networks EX Series Ethernet Switches, M Series Multiservice Edge Routers, MX Series 5G universal Routing Platforms, and SRX Series Services Gateways.
PTX10016 Components and Configurations
Table 3 lists the four hardware configurations for a PTX10016 modular chassis—base (AC version), and redundant (AC and DC versions)—and the components included in each configuration.
Table 3: PTX10016 Hardware Configurations
Base AC configuration
Base DC configuration
Redundant AC configuration
Redundant DC configuration
You can install up to 16 line cards (any combination of line cards) in the PTX10016.
Line cards and the cable management system are not part of the base or redundant configurations. You must order them separately.
If you want to purchase additional power supplies (AC, DC, or HVAC or HVDC), SIBs, or RCBs for your router configuration, you must order them separately.
PTX10000 Component Redundancy
The PTX10000 line of routers are designed so that no single point of failure can cause the entire system to fail. The following major hardware components in the redundant configuration provide redundancy:
Routing and Control Board (RCB)—RCB consolidates the Routing Engine function with control plane function in a single unit. The PTX10000 line of routers can have one or two RCBs. When two RCBs are installed, one functions as the master and the other functions as the backup. If the master RCB (or either of its components) fails, the backup can take over as the master. See PTX10000 Routing and Control Board Description.
Switch Interface Boards (SIBs)—The PTX10000 line of routers have six SIB slots. Five SIBs are required for base operation and the sixth SIB provides N+1 redundancy. All six SIBs are active and can sustain full throughput rate. The fabric plane can tolerate one SIB failure without any loss of performance. See the PTX10008 Switch Interface Board Description and PTX10016 Switch Interface Board Description.
Power supplies—The PTX10000 routers require three power supplies for minimum operation (two RCBs, two fan trays, six SIBs and no line cards). Additional power supplies provide n+1 redundancy for the system. Both AC, DC, HVAC, and HVDC systems tolerate a single power supply to fail without system interruption. If one power supply fails in a fully redundant system, the other power supply can provide full power to the PTX10000 indefinitely.
The PTX10000 routers also support power source redundancy. Two sets of lugs are provided for the JNP10K-PWR-AC cables, four sets of lugs are provided for the JNP10K-PWR-DC2 cables,and two AC power cords are provided for each JNP10K-PWR-AC power supply.
Cooling system—The fan trays have redundant fans, which are controlled by the fan tray controller. If one of the fans fails, the host subsystem increases the speed of the remaining fans to provide sufficient cooling for the router indefinitely. See PTX10008 Cooling System and Airflow and PTX10016 Cooling System and Airflow.
PTX10000 Hardware and CLI Terminology Mapping
This topic describes the hardware terms used in PTX10000 router documentation and the corresponding terms used in the Junos OS CLI. See Table 4.
Table 4: CLI Equivalents of Terms Used in Documentation for PTX10000 Routers
Hardware Item (CLI)
Item In Documentation
Routing and Control Board
n is a value in the range of 0–1.
Multiple line items appear in the CLI if more than one RCB is installed in the chassis.
Routing and Control Board
Abbreviated name of the Flexible PIC Concentrator (FPC)
On PTX10008, and PTX10016, an FPC is equivalent to a line card.
n is a value in the range of 0–7 for the PTX10008 and 0–15 for the PTX10016. The value corresponds to the line card slot number in which the line card is installed.
Line card (The router does not have actual FPCs–the line cards are the FPC equivalents on the router.)
Abbreviated name of the transceiver
n is a value equivalent to the number of the port in which the transceiver is installed.
Abbreviation for power supply unit
One of the following:
n is a value in the range of 0–5. The value corresponds to the power supply slot number.
AC, DC, HVAC, or HVDC power supply
One of the following:
This field indicates:
n is a value in the range of 0–5.
Value of n is always 0.