Best way to detect failure in Metro ethernet networks

[thomas.fayet]

Hello ,

I am working for a well known provider and I am currently migrating one of my client from Frame-relay to Metro-ethernet link .

I am actually looking for advices on what sort of mechanism to implement to detect a failure in the ME parth .

As you probably know , failure on one of the links might cause the CE-SWITCH-PE interfaces to stay up/up and the network will not neceseraliy start converging .

So far I have implemented BFD along with IP SLA route tracking , I am happy with BFD but the IP SLA is acting "weird" .

- IP SLA ICMP tracking rely on ICMP packets and was too sensitive to packets lost

- We switched to ip route sla tracking but I am still unsure about the best way to use or implement this .

Is there some sort of best practices available somewhere for this ?

thanks ¨

T

[shreerampardhy]

Hello Thomas,

From what i have seen BFD is best bet as it allows to relax the L3 protocols timers ( BGP / any other protocol used between CE- PE ). Another option is to have gre tunnel between the PE - CE link and track this tunnel interface.

Regards,

Shreeram