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Repair Path high convergence problems on asr920 with SR TI-LFA

iran.lima
Level 1
Level 1

Hi Guys, 

 

I have a segment routing metro ring with 4 equips and the convergence time after a failure link is about 10 seconds. In theory convergence time would be about 50ms. Any idea what is occurring ? A brief topology and sampling of the configuration involved is following:

 

Topology Ring:

ASR9010-1 <> ASR920-1 <> ASR920-2 <> ASR9010-2

 

ASR920 Sample configuration:

router ospf x
router-id x.x.x.x
segment-routing area 0 mpls
fast-reroute per-prefix enable prefix-priority low
fast-reroute per-prefix ti-lfa
microloop avoidance rib-update-delay 10000

 

interface TenGigabitEthernet0/0/26
mtu 9216
ip unnumbered Loopback0 poll point-to-point
ip mtu 9202
ip ospf authentication key-chain ospf-key
ip ospf network point-to-point
ip ospf bfd strict-mode
ip ospf cost 10000
load-interval 30
carrier-delay down msec 1
cdp enable
bfd template SRRING

 

interface TenGigabitEthernet0/0/27
mtu 9216
ip unnumbered Loopback0 poll point-to-point
ip mtu 9202
ip ospf authentication key-chain ospf-key
ip ospf network point-to-point
ip ospf bfd strict-mode
ip ospf cost 10000
load-interval 30
carrier-delay down msec 1
cdp enable
bfd template SRRING

 

bfd-template single-hop SRRING
interval microseconds min-tx 5000 min-rx 5000 multiplier 3

1 Reply 1

bsn1980in
Level 1
Level 1

Hi 

How you are testing?  Please share steps.  Do you have logs?  You can analyze, what is taking more time.

 

Regards

Bharat