Troubleshooting JUNOS Platforms
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T Series PIC Numb ring |
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The slide tails typical port numbering for common T Series PICs. |
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JUNOS Platform Details • A–31
Troubleshooting JUNOS Platforms
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Components and Charact ristics of Ethernet Services Routers and |
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Switches |
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The slide highlights the topic we discuss next. |
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A–32 • JUNOS Platform Details
Troubleshooting JUNOS Platforms
ChassisReproductionD scri
The MX960 Eth rn S rvic s router is an Ethernet-optimized edge router that provides both switching and carrier-class Ethernet routing. The MX960 has a capacity of up to 480 gigabits per second (Gbps), full duplex. The MX960 enables a wide range
of business and residential applications and services, including high-speed transport forand VPN services, next-generation broadband multiplay services, and high-volume
Inte net data center internetworking. The MX960 is 16 rack units (RU) tall. You can stack th ee routers in a single floor-to-ceiling rack, for increased port density per unit
fl r space. The router provides 14 slots that you can populate with up to
12 interface cards and two Switch Control Boards (SCBs) in nonredundant fabric
c nfigurations. Fully populated, the MX960 provides up to 480 Gigabit Ethernet or up to 48 10-Gigabit Ethernet ports. Two types of Dense Port Concentrator (DPC) interface cards are available, both of which consist of four PFEs and enable a throughput of 10 Gbps:
• A 40-port Gigabit Ethernet DPC with small form-factor pluggable transceiver (SFP) connectors (1000 Mbit copper and fiber only); and
• A 4-port 10-Gigabit Ethernet DPC with 10-gigabit small form-factor pluggable transceiver (XFP) connectors.
Continued on next page.
JUNOS Platform Details • A–33
Troubleshooting JUNOS Platforms
Hardware Features
The midplane is in the center of the chassis and forms the rear of the DPC card cage. The DPCs and SCBs install into the midplane from the front of the chassis, and the power supplies install into the midplane from the rear of the chassis. The power supplies and cooling system components also connect to the midplane.
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The MX960 chassis provides redundancy and resiliency. The hardware system is fully |
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redundant, including power supplies, fan trays, REs, and SCBs. |
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A–34 • JUNOS Platform Details
Troubleshooting JUNOS Platforms
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Power and Cooling |
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In the AC pow configuration, the router contains three or four AC power supplies, |
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located vertically at the r ar of the chassis in slots PEM0 through PEM3 (left to right). |
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Each AC power supply provides power to all components in the router. When three |
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power supplies are present, they share power almost equally within a fully populated |
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system. |
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F ur AC power supplies provide full power redundancy. If one power supply fails or you |
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ve it, the remaining power supplies instantly assume the entire electrical load |
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ut interruption. Three power supplies provide the maximum configuration with |
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wer for as long as the router is operational. |
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In the DC power configuration, the router contains either two or four DC power supplies located at the lower rear of the chassis in slots PEM0 through PEM3 (left to right). You can upgrade your DC power system from two to four power supplies. The DC power supplies in slots PEM0 and PEM2 provide power to the lower fan tray, DPC slots 6 through 11, and SCB slots 1 and 2. The DC power supplies in slots PEM1 and PEM3 provide power to the upper fan tray, DPC slots 0 through 5, and SCB slot 0.
Four power supplies provide full redundancy. If a DC power supply fails, its redundant power supply takes over without interruption.
The cooling system components work together to keep all router components within the acceptable temperature range. The router has two fan trays located in the front of the router that install horizontally above and below the DPC card cage. Each fan tray contains six fans. The fan trays are interchangeable and are hot-insertable and hot-removable.
JUNOS Platform Details • A–35
Troubleshooting JUNOS Platforms
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Types of Line Cards |
Three types of DPCs are available for MX Series routers: DPCE-X, DPCE-R, and DPCE-Q. |
The DPCE-X builds upon the Juniper Networks leadership position in providing |
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networking hardware and software by extending the JUNOS |
performancecapabilities. |
Softwa e to include traditional Layer 2 switching features such as Spanning Tree as |
well as mo e ecent Ethernet standards developments including Operation, |
Administ ati n, and Maintenance (OAM). Th MX Series combined with the DPCE-X |
Layer 2 switching cards provide a wide range of MPLS and Ethernet functionality for |
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ective Layer 2 aggregation. |
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In additi n to the Layer 2 switching and MPLS features offered on the DPCE-X cards, |
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he DPCE-R cards provide a full suite of routing protocols and packet processing |
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The DPCE-Q cards provide enhanced queuing capabilities with support of up to |
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64,000 individual queues, 4 level hierarchical weighted round-robin (WRR), 4 levels of |
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per-VLAN queue priority, and changeable allocation of schedulers per port (8,000 |
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scheduler nodes with 8 queues each or 16,000 nodes with 4 queues each). |
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Continued on next page. |
A–36 • JUNOS Platform Details
Troubleshooting JUNOS Platforms
Types of Routing Engines
Two types of REs are available on the MX Series—an RE with a 1.3 Ghz processor and 2 GB of memory or an RE with a 2.2 Ghz processor and 4 GB of memory. Both REs contain a 30 GB hard disk and a flash disk that can be up to 1 GB. One port per RE exists for USB 2.0 media.
JUNOS Platform Details • A–37
Troubleshooting JUNOS Platforms
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MX960 Compon nt Plac m nt |
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The slide shows the plac m nt of the hardware components the front of the |
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device. |
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A–38 • JUNOS Platform Details
Hardware Features
The MX chassis provides redundancy and resiliency. The hardware system is fully redundant, including power supplies, REs, and SCBs.
The midplane is in the center of the chassis and forms the rear of the DPC card cage. The DPCs and SCBs install into the midplane from the front of the chassis, and the power supplies install into the midplane from the rear of the chassis. The power supplies and cooling system components also connect to the midplane.
ChassisReproductionD scri
The MX480 Eth rn S rvic s router is an Ethernet-optimized edge router that provides both switching and carrier-class Ethernet routing. The MX480 has a capacity of up to 240 Gbps, full duplex. The MX480 enables a wide range of business and
foresidential applications and services, including high-speed transport and VPN
se vices, next-generation broadband multiple services, and high-volume Internet data center internetworking.
The MX480 is eight RU tall. You can stack five routers in a single floor-to-ceiling rack, r increased port density per unit of floor space. The router provides eight slots that
y u can populate with up to six DPC cards and two SCBs in nonredundant fabric configurations.
Not Fully populated, the MX480 provides up to 240 Gigabit Ethernet or up to 24 10-Gigabit Ethernet ports. Six types of DPC cards are available, each of which consists of four PFEs and enables a throughput of 10 Gbps.
Troubleshooting JUNOS Platforms
JUNOS Platform Details • A–39
Troubleshooting JUNOS Platforms
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Reproduction |
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Power and Cooling |
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In the AC power configuration, the router contains three or four AC power supplies, |
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located vertically at the ar of the chassis in slots PEM0 through PEM3 (left to right). |
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Each AC power supply provides power to all components in the router. When three |
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power supplies a e present, they share equally within a fully populated system. |
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Four AC power supplies provide full power redundancy. If one power supply fails or you |
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ve it, the emaining power supplies instantly assume the entire electrical load |
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ut inte |
uption. Three power supplies provide the maximum configuration with |
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ull p |
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r as long as the router is operational. |
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In the DC p |
wer configuration, the router contains either two or four DC power |
supplies located at the rear of the chassis in slots PEM0 through PEM3 (left to right). |
You can upgrade your DC power system from two to four power supplies. The DC power |
supplies in slots PEM0 and PEM2 provide power to the fan tray, DPC slots 0 and 1, |
and SCB slots 0 and 1. The DC power supplies in slots PEM1 and PEM3 provide power |
to the fan tray and DPC slots 2 through 5. |
Four power supplies provide full redundancy. If a DC power supply fails, its redundant |
power supply takes over without interruption. |
The cooling system components work together to keep all router components within |
the acceptable temperature range. The router has one fan tray and one air filter that |
installs vertically in the rear of the router. The fan tray contains six fans. The fan tray is |
hot-insertable and hot-removable.
A–40 • JUNOS Platform Details
