[c-nsp] BFD on port channel

[Geert Nijs]

and what if your BFD packets would be running on the first link of your
3-link portchannel, but your OSPF packets on the second link (by
coincidence)...doesn't make sense , see.......

2011/11/3 Geert Nijs <geert.nijs at gmail.com>

> As far as i know, BFD is not supported on portchannels. Some IOS however,
> let you configure it, but it doesn't work. And it is quiet logical:
> think about it: by default BFD is running on one link in your portchannel.
> What if this link fails ? do you want to bring down OSPF/BGP ? no of course
> not,
> however, bfd would react so fast it would bring down the routing session
> even before it is able to fail over to another link.
>
> The same for the other suggestion: run BFD on each link (resource waiste
> and hog). Run BFD on each link, but only bring down the routing session
> when the last BFD
> on the portchannel goes down ? ok would work, but how would you send
> traffic on each link: BFD works on IP level, not L2 or even L1 level,  you
> can't put an IP on each link in a portchannel,
>
> so no, forget BFD and portchannels :-)
>
> regards,
> Geert
>
> 2011/10/25 zaid <zaidoon_h at yahoo.com>
>
>> my ios 12.2 SRB doesn't support BFD on port channel , I look for BFD per
>> link ? which ios dose support ? is there another way to detect port channel
>> failure
>>
>>
>>  Zaid
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