Go to the downstream router R2 and display the session information:
Example:
If R2 has no PSB, either the path message is not making it to the
router or the path message is being rejected (for example, due to lack of
resources). If R2 has a PSB but no RSB, go to the next downstream router R3
to investigate. If R2 has a PSB and an RSB, this means the reservation is
not making it from R2 to R1 or is being rejected.
Step 2
show rsvp counters messages summary
Verifies whether the RSVP message is being transmitted and received.
Example:
RP/0/RP0/CPU0:router# show rsvp counters messages summary
All RSVP Interfaces Recv Xmit Recv Xmit Path 0 25
Resv 30 0 PathError 0 0 ResvError 0 1 PathTear 0 30 ResvTear 12 0
ResvConfirm 0 0 Ack 24 37 Bundle 0 Hello 0 5099 SRefresh 8974 9012
OutOfOrder 0 Retransmit 20 Rate Limited 0
Step 3
show rsvp counters events
Verifies how many RSVP states have expired. Because RSVP uses a soft-state mechanism, some failures will lead to
RSVP states to expire due to lack of refresh from the neighbor.
Example:
RP/0/RP0/CPU0:router# show rsvp counters events
mgmtEthernet0/0/0/0 tunnel6 Expired Path states 0 Expired
Path states 0 Expired Resv states 0 Expired Resv states 0 NACKs received 0
NACKs received 0 POS0/3/0/0 POS0/3/0/1 Expired
Path states 0 Expired Path states 0 Expired Resv states 0 Expired Resv
states 0 NACKs received 0 NACKs received 0 POS0/3/0/2
POS0/3/0/3 Expired Path states 0 Expired Path
states 0 Expired Resv states 0 Expired Resv states 1 NACKs received 0 NACKs
received 1
Step 4
show rsvp interface type interface-path-id [detail]
Verifies that refresh reduction is working on a particular interface.
Example:
RP/0/RP0/CPU0:router# show rsvp interface pos0/3/0/3 detail
INTERFACE: POS0/3/0/3 (ifh=0x4000D00). BW
(bits/sec): Max=1000M. MaxFlow=1000M. Allocated=1K (0%). MaxSub=0.
Signalling: No DSCP marking. No rate limiting. States in: 1. Max missed
msgs: 4. Expiry timer: Running (every 30s). Refresh interval: 45s. Normal
Refresh timer: Not running. Summary refresh timer: Running. Refresh
reduction local: Enabled. Summary Refresh: Enabled (4096 bytes max).
Reliable summary refresh: Disabled. Ack hold: 400 ms, Ack max size: 4096
bytes. Retransmit: 900ms. Neighbor information: Neighbor-IP Nbor-MsgIds
States-out Refresh-Reduction Expiry(min::sec) -------------- --------------
---------- ------------------ ---------------- 64.64.64.65 1 1 Enabled
14::45
Step 5
show rsvp graceful-restart
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
130
Implementing RSVP for MPLS-TE and MPLS O-UNI
Verifying RSVP Configuration
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