Understanding the SIBs

Purpose

Inspect the SIBs to ensure that they provide the switching function to the destination FPCs.

What Is an SIB

A SIB forwards packets to a destination FPC.

Table 79 shows the SIB characteristics for the M320 router, T320 router, and the T640 routing node.

Table 79: SIB Packet Forwarding Characteristics

Routing Platform	Million Packets per Second (Mpps) Forwarding	Number of SIBs per Chassis	Redundancy
M320	385	4	No
T320	320	3	Yes
T640	640	5	Yes

Figure 134 shows the M320 router SIB component.

Figure 134: M320 Router SIB Component

Figure 138 shows the T320 router and T640 routing node SIB component.

Figure 135: T320 Router and T640 Routing Node SIB Component

Figure 136 shows the location of the SIBs on the M320 router, T320 router, and the T640 routing node.

Figure 136: M320 Router, T320 Router, and T640 Routing Node SIB Location