BFD over p2p transport links

Tore Anderson tore.anderson at
Fri Feb 5 17:50:39 UTC 2010

* Serge Vautour

> I'm being asked to look into using BFD over our P2P transport links. 
> Is anyone else doing this? Our transport links are all 10G Ethernet 
> (LAN-PHY). There's no alarming inside of LAN-PHY like there is in 
> SONET. The transport side should propagate a fiber break by stopping 
> to send light on both ends. This is enough to cause the router 
> interfaces to drop and for protocols to converge.

If only one strand in your fibre breaks, only the side that has the
broken strand connected to Rx will see the physical interface go down.
I've seen this happen with Extreme equipment at least.

Best regards,
Tore Anderson
Redpill Linpro AS -
Tel: +47 21 54 41 27

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