Line modules on the E120 and E320 routers act as frameforwarding engines for the physical interfaces, which are the IOAs.
You cannot configure the performance line rate of line modules for E120 and E320 routers. Redundancy is supported for line modules on this router. For more information, see Line Module Redundancy.
On the E120 router, line modules can be installed in slots 0–5. On the E320 router, line modules can be installed in slots 0–5 and 11–16. Both the E120 and E320 routers have two turbo slots, numbered 2 and 4. When a line module is installed in a turbo slot, it spans slots 2–3 and 4–5. The bandwidth of slot 3 or slot 5 is used for a line module in slot 2 or slot 4 if that line module requires the turbo slot.
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Note: If a line module is installed in slot 3 or slot 5, and the line module in slot 2 or 4 requires bandwidth, the system configures the line module it detects first. The state of the other line module is displayed in the show version command output as disabled (cfg error). |
The 100 Gbps switch fabric that is available with the SRP 100 on the E320 router allocates 3.4 Gbps of overall bandwidth to each regular line module slot and 10 Gbps of overall bandwidth to each of the turbo slots. With a 100 Gbps fabric configuration, you must install the ES2 10G Uplink LM in the turbo slots. For more information, see JUNOSe Physical Layer Configuration Guide.
The 120 Gbps switch fabric on the E120 router allocates 10 Gbps of overall bandwidth to each line module slot. Similarly, the 320 Gbps switch fabric on the E320 router allocates 10 Gbps of overall bandwidth to each line module slot. For both configurations, you can install any line module in any of the slots.
A line module on the E120 and E320 routers can accommodate one full-height IOA or up to two half-height IOAs per slot. In the software, adapter 0 identifies the right IOA bay (E120 router) and the upper IOA bay (E320 router); adapter 1 identifies the left IOA bay (E120 router) and the lower IOA bay (E320 router).
You can configure the slot by using the command-line interface (CLI), as well as the individual IOAs. For example, if you want to disable the line module installed in slot 3, issue the slot disable 3 command. If you want to disable the IOA in the upper bay or left bay of slot 3, issue the adapter disable 3/0 command. Table 38 lists the IOA bay values that you use to manage half-height and full-height IOAs.
For some IOAs, issuing the adapter disable 3/0 command reboots the line module. Modules that support hot-swapping enable you to remove and add an IOA in a slot without rebooting the line module. If the slot is populated with another active IOA, it continues to operate.
Depending on the IOA type, you can manage IOAs from certain slots or bays. Table 38 lists the IOA management information, including valid IOA combinations and hot-swapping support.
Table 38: IOA Management Information
For more information about interface types and specifiers for the E120 and E320 routers, see Interface Types and Specifiers.
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