BFD over p2p transport links

[Serge Vautour <sergevautour () yahoo ca>]

Hello,

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. 

Since LAN-PHY doesn't have any built end-end alarming, some folks believe that we may encounter situations where a 
fiber break doesn't cause interfaces do go down. Convergence would then have to wait for IGP hellos to detect the 
problem. 

Is anybody else running BFD over 10G LAN-PHY transport links? Any comments around BFD for this application in general?

Thanks,
Serge



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