On Fri, Feb 5, 2010 at 9:45 AM, Serge Vautour <sergevaut...@yahoo.ca> wrote: > 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.
We only use BFD on L2 circuits. Ethernet auto-neg includes limited link-fault signalling. It's not as good as SONET, but it will detect link-failure/one-way link. > 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. Have not found GigE 10GigE to be a problem over fiber. Have found BFD to be problematic depending on the implementation and CPU load of your equipment. The closer you can stay to the physical layer, the better off you are. > Is anybody else running BFD over 10G LAN-PHY transport links? Any comments > around BFD for this application in general? > > Thanks, > Serge > > > > __________________________________________________________________ > Looking for the perfect gift? Give the gift of Flickr! > > http://www.flickr.com/gift/ > > -- Tim:> Sent from Brooklyn, NY, United States
