The router accommodates up to two SRP modules and three SFMs that act as an integrated system controller (SC) and switch fabric system. The SC is located on the SRP modules; the router’s switch fabric is distributed between the SRP modules and SFMs. The switch fabric is divided into fabric slices; each SRP module and SFM has a resident fabric slice. At least four of the five possible fabric slices must be installed for the E120 and the E320 routers to operate.
You can configure the E120 router with a 320 Gbps fabric by installing SRP 120 modules and SFM 120 modules, or SRP 320 modules and SFM 320 modules.
You can configure the E320 router with a 100 Gbps fabric by installing SRP 100 modules and SFM 100 modules. To achieve increased switch fabric capacity and speed, you can configure the E320 router with a 320 Gbps fabric by installing SRP 320 modules and SFM 320 modules.
You can configure the SC and the fabric slices on the SRP modules separately. For example, if you disable the fabric slice on the standby SRP module by using the slot disable 7 fabric command, the SC on that SRP module is still enabled.
Redundancy is supported for SRP modules on the E120 and E320 routers. For more information, see SRP Module Redundancy.
SRP modules on the E120 and E320 routers have two slots for flash cards; other E-series routers have only a single slot. Cards installed in the second slot can be used only for core dump (.dmp) files. For more information, see Managing Flash Cards on SRP Modules.
SRP modules on the E120 and E320 routers have a corresponding SRP IOA that contains a Fast Ethernet management port. You can configure this port to access the router from the CLI or SNMP. For more information, see Managing the Ethernet Port on the SRP Module .
For information about using high availability mode for stateful SRP switchover, see Managing Modules.