Redundancy Connection for a T320 Router and T640 Routing Node

Figure 191 shows the connection between the master and backup host modules on a T320 router or a T640 routing node with a Routing Engine 600 (RE-600). Keepalive messages are sent from one Routing Engine to the other over the fxp2 interface found on the Routing Engine. The keepalive message is received by the other host module via the fpx1 interface. A keepalive message is sent back over the fxp2 interface of the other Routing Engine. In this way, the master and the backup host subsystems exchange state information.

Figure 191: Redundancy Connection for a T320 Router or T640 Routing Node (RE-600)

Figure 192 shows the connection between the master and backup host modules on a T320 router or a T640 routing node with a Routing Engine 1600 (RE-1600).

Figure 192: Redundancy Connection for a T320 Router or T640 Routing Node (RE-1600)