03-27-2008 05:49 AM
Hi,
Sorry for the basic question on TE...
In the below output, im seeing two path info, one is RSVP and other is CSPF info. Out of two, will traffic always prefer the RSVP path or CSPF path ????
In my case im seeing the traffic is preferring RSVP path..
LAB-RACK4-GSR-P3#sh mpls traf tu tu 1
Name: LAB-RACK4-GSR-P3_t1 (Tunnel1) Destination: 192.168.0.6
Status:
Admin: up Oper: up Path: valid Signalling: connected
path option 10, type explicit TE-path (Basis for Setup, path weight 3)
path option 20, type dynamic
Config Parameters:
Bandwidth: 5000 kbps (Global) Priority: 5 5 Affinity: 0x0/0xFFFF
Metric Type: TE (default)
AutoRoute: enabled LockDown: disabled Loadshare: 5000 bw-based
auto-bw: disabled
Active Path Option Parameters:
State: explicit path option 10 is active
BandwidthOverride: disabled LockDown: disabled Verbatim: disabled
InLabel : -
OutLabel : GigabitEthernet3/2, 28
RSVP Signalling Info:
Src 192.168.0.3, Dst 192.168.0.6, Tun_Id 1, Tun_Instance 55
RSVP Path Info:
My Address: 10.10.10.2
Explicit Route: 10.10.10.1 11.11.11.21 11.11.11.22 11.11.11.17
11.11.11.18 192.168.0.6
Record Route: NONE
Tspec: ave rate=5000 kbits, burst=1000 bytes, peak rate=5000 kbits
RSVP Resv Info:
Record Route: NONE
Fspec: ave rate=5000 kbits, burst=1000 bytes, peak rate=5000 kbits
Shortest Unconstrained Path Info:
Path Weight: 1 (TE)
Explicit Route: 10.10.10.18 10.10.10.17 192.168.0.6
History:
Tunnel:
Time since created: 1 hours, 5 minutes
Time since path change: 11 minutes, 21 seconds
Number of LSP IDs (Tun_Instances) used: 55
Current LSP:
Uptime: 11 minutes, 24 seconds
Selection: reoptimization
Prior LSP:
ID: path option 20 [52]
Removal Trigger: reoptimization completed
LAB-RACK4-GSR-P3#trace 192.168.0.6
Type escape sequence to abort.
Tracing the route to 192.168.0.6
1 10.10.10.1 [MPLS: Label 28 Exp 0] 0 msec 0 msec 0 msec
2 11.11.11.22 [MPLS: Label 34 Exp 0] 0 msec 0 msec 0 msec
3 11.11.11.18 0 msec 0 msec *
LAB-RACK4-GSR-P3#
Thanks in advance
03-27-2008 06:39 AM
Arunkumar,
The first explicit route is the one that has actually been signalled by RSVP.
The second one is, as indicated, the shortest unconstrained path (non-cspf). This explicit route might or might not be the same as the outcome of the CSPF. In the case where your tunnel is configured without any constraint (no specific BW, attributes or explicit path for instance), the two explicit route will be the same.
Regards,
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