06-09-2014 05:47 AM
Hi,
I have an Explicit Path configured on a tunnel as 1 and a dynamic path as 2.
If a link fails in the core FRR fails over, then after a while the tunnel takes teh dynamic path. However when the link recovers the tunnel stays on the dynamic path.
My question is: how can i force to take the explicit path again?
R1#show mpls traffic-eng tunnels tunnel 1
Name: R1_t1 (Tunnel1) Destination: 2.2.2.2
Status:
Admin: up Oper: up Path: valid Signalling: connected
path option 2, type dynamic (Basis for Setup, path weight 3)
path option 1, type explicit 1
Config Parameters:
Bandwidth: 0 kbps (Global) Priority: 7 7 Affinity: 0x0/0xFFFF
Metric Type: TE (default)
AutoRoute: disabled LockDown: disabled Loadshare: 0 [0] bw-based
auto-bw: disabled
Active Path Option Parameters:
State: dynamic path option 2 is active
BandwidthOverride: disabled LockDown: disabled Verbatim: disabled
InLabel : -
OutLabel : FastEthernet0/1, 28
Next Hop : 10.15.0.5
RSVP Signalling Info:
Src 1.1.1.1, Dst 2.2.2.2, Tun_Id 1, Tun_Instance 32
RSVP Path Info:
My Address: 10.15.0.1
Explicit Route: 10.15.0.5 10.56.0.5 10.56.0.6 10.26.0.6
10.26.0.2 2.2.2.2
Record Route: NONE
Tspec: ave rate=0 kbits, burst=1000 bytes, peak rate=0 kbits
RSVP Resv Info:
Record Route: 5.5.5.5(28) 6.6.6.6(33)
2.2.2.2(3)
Fspec: ave rate=0 kbits, burst=1000 bytes, peak rate=0 kbits
Shortest Unconstrained Path Info:
Path Weight: 3 (TE)
Explicit Route: 10.15.0.1 10.15.0.5 10.56.0.5 10.56.0.6
10.26.0.6 10.26.0.2 2.2.2.2
History:
Tunnel:
Time since created: 1 hours, 48 minutes
Time since path change: 55 seconds
Number of LSP IDs (Tun_Instances) used: 32
Current LSP: [ID: 32]
Uptime: 58 seconds
Selection: reoptimization
Prior LSP: [ID: 30]
ID: path option 1 [30]
Removal Trigger: re-route path error
Last Error: RSVP:: Path Error from 10.13.0.3: Notify: Tunnel locally repaired (flags 0)
Thx!
09-16-2014 08:40 AM
Hi,
By default, the re-optimization is around 1 hour. You can use the below command to speed up the re-optimization,
mpls traffic-eng reoptimize timers frequence <seconds>
With this command, the router after the seconds mentioned will check for better path for existing LSP (to see if primary path option is available) and use it if available.
-Nagendra
09-28-2014 05:41 AM
There are couple of options,
Manual re optimization with mpls traffic
R11#mpls traffic-eng reoptimize tunnel 1 in the exec mode
or event Driven re optimization with “ mpls traffic-eng reoptimize events link-up“ command in IOS
Not sure if you require the solution by now , Let me know incase you have any further query on MPLS TE
09-16-2016 03:34 AM
By default, the re-optimization is around 1 hour.
I tried in real XR network, it less than 30 minutes. Do you have any document to support?
But I found on IOS like you said.
http://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/TE_1208S.html#wp27138
Thank you very much.
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