The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Simple/trivial Link/Node Protection in MPLS domain
Hi Assume a Node when calculate it is IGP SPF for certain FEC it calculate not just the "best path" but also the "2nd best path" . The node operate in "Liberal retention mode" . When the "best path" is down (trigered by interface down indication) the node start immediately use the "2nd best path" and associated label without waiting for the IGP to converge . the definition of "2nd best path" is configurable it could be simply based on cost or some Topology based constrain (example : Next hop node is different on next hop node of the first path or the whole path is different of the path of the "best path"..etc ) . as optionally ,ACL's could be used to set wich traffic will be protected and which traffic is not . Sure the above is so simple/trivial when comparing to the current architect of link/node protection but it have the advantage of simplicity. i have seen some on-line implem of link protection which actually use no reservation (b.W requested is zero) for the backup tunnel and Backup tunel setup is dynamic ie: based on IGP so the outcome is almost equivalent of using this "simple/trivial" approach . my question are : 1- Is the above is workable . 2- is any implem out their doing the same . Brgds _________________________________________________________________ MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*. http://join.msn.com/?page=features/virus ------- The MPLS-OPS Mailing List Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml Archive: http://www.mplsrc.com/mpls-ops_archive.shtml |
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