JUNOS Internet Software Network Operations Guide: Hardware
326 ! Understanding the SIBs
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
Figure 134 shows the M320 router SIB component.
Figure 134: M320 Router SIB Component
3. Perform an SIB Swap Test on page 336 1. Take the SIB offline.
2. Replace the SIB with one that you know works.
3. Bring the SIB online.
4. Check the SIB status.
Getting SIB Hardware Information on page 337
1. Display SIB Hardware Information on page 337
show chassis hardware
2. Locate the SIB Serial Number ID Label on page 338 Look on the top left of the SIB component.
Returning the SIB on page 338
Follow the procedure in the appropriate router hardware
guide.
Monitor SIB Tasks Command or Action
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
g003456
Extractor clip
Extractor clip
Online/offline
button
LEDs
ACTIVE
SIB-M
O
N
LIN
E
/
O
FFLIN
E
OK
FAIL