11-26-2021 05:19 AM
Hi all ,
MPLS TE 1001 - >From CR-1 to CR-2 path option is strict explicit.
MPLS TE 1002 - >From CR-1 to AGG-1 path option is strict explicit.
IGP protocol -OSPF
We are experiencing CRC error in between CR-1 and CR-2. We need to shift the traffic from problematic path to CR1 - AGG1 path.
We modified OSPF cost in between CR-1 to CR-2 but still routes are being installed via MPLS TE-1001(Not shifted traffic).
When we modified metric on MPLS TE 1001(Auto route metric absolute 1000) shifted traffic to MPLS TE 1002.
I would like to clear my doubt here. what is the correct method to shift traffic in MPLS TE with explicit strict path option topology ?
Thanks in advance.
11-26-2021 05:30 AM
chcek with OSPF routing table see is that effected in the config?
also compare the matric learned from other path.
11-30-2021 09:46 AM
follow
12-17-2021 06:35 PM
Hi Ratheesh ,
MPLS Strict means that the next address in the explicit path belongs to an adjacent router to the router in the sequence.
Now with expilict path you should have confgured atleast one primary and one back-up explicit path in MPLE TE tunnel .(based on the design it should have been done )
In Cisco both XR/XE we have a feature to force-switch path via MPLS TE diectly.
Note : Make sure that path-protection timers reopt-after-switchover is confgured with higher time otherwise it will switch back to primary path once reoptimization done.
To force a manual switchover for path-protected tunnel, use the mpls traffic-eng path-protection switchover tunnel-te command in EXEC mode. To disable this feature, use the no form of this command.
mpls traffic-eng path-protection switchover tunnel-te tunnel ID
no mpls traffic-eng path-protection switchover tunnel-te tunnel ID
Syntax Description
tunnel ID |
Tunnel identifier of the P2P tunnel for the path protection switchover. Range is from 0 to 65535 |
To configure the time to wait after a switchover occurs on a tunnel before a reoptimization is attempted for the tunnel, use the path-protection timers reopt-after-switchover command in MPLS-TE configuration mode. To disable this feature, use the no form of this command.
path-protection timers reopt-after-switchover (seconds)
seconds |
Time, in seconds, between path-protection event and tunnel reoptimization. Range is from 0 to 604800. |
seconds : 180 (3 minutes)
----------------------XE
XE1#mpls traffic-eng ?
fast-reroute fast-reroute command
reoptimize reoptimize traffeng tunnels
reroute allow traffeng tunnels with sticky path to reroute
setup-timer setup timer expiration
switch manual switch between working/protect path
XE1#mpls traffic-eng switch ?
Tunnel Tunnel interface
non-revertive deprecated
<cr> <cr>
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