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TE FRR Autotunnel Failover Times

gabbdavida
Level 1
Level 1

Hi,

I'm trying to use the Cisco Auto tunnel Traffic Engineering feature to improve convergence times; with FRR, these still appear to be of the order of 1 second not the sub second fail-over I was expecting to see. With a standard Windows ping, one or two polls are always lost and CCTV traffic picture sync is lost on each occasion. The NHOP/NNHOP backup tunnels appear to work correctly; fails over to NNHOP.

The network is a mix of ME3600 (PE) and C6509 (P) providing L3VPN services.

config extract below:

mpls traffic-eng tunnels

mpls traffic-eng auto-tunnel backup

mpls traffic-eng auto-tunnel backup config unnumbered-interface Loopback0

mpls traffic-eng auto-tunnel backup tunnel-num min 1000 max 1200

mpls ldp explicit-null

mpls label protocol ldp

!

interface Tunnel3

ip unnumbered Loopback0

tunnel destination 10.172.2.9

tunnel mode mpls traffic-eng

tunnel mpls traffic-eng autoroute announce

tunnel mpls traffic-eng priority 7 7

tunnel mpls traffic-eng bandwidth 128

tunnel mpls traffic-eng path-option 1 explicit name tpi_main

tunnel mpls traffic-eng fast-reroute

!

ip explicit-path name tpi_main enable

next-address 10.172.2.1

next-address 10.172.2.2

1 Reply 1

shreerampardhy
Level 1
Level 1

Hello Gabbdavida,

The backup tunnels usually kick-in once the failure has been detected. What mechanism are you using for detection of failure? Do you have BFD or Loop free alternate ( for OSPF ) enabled? Bfd can give you faster detection timers in order of milliseconds.

Regards,

Shreeram