The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] MPLS/BGP routing question
on 00.9.30 0:32 AM, Eric Rosen at erosen@cisco.com wrote: > > Matsushima> When a LSP of PE to PE broken, BGP has no way of LSP broken. > Matsushima> Then, BGP keep up of VPN routes and VPN traffic going to black > Matsushima> hole, until LSP available. > > Matsushima> As a result, VPN customer can not back up their traffic to any > Matsushima> link. > > Matsushima> I think this is one of most seriously problem of BGP/MPLS VPN. > > The situation you are worried about is where there is IGP connectivity > between the edges, but for some reason labeled packets cannot make it from > one edge to another. Yes, exactly. > I guess we don't really see this as a realistic failure > scenario. Sure, buggy software could cause this, but there's a million ways > in which buggy software could cause undetected packet loss. > I think that LSP failure was caused by not only buggy software but also oparation failure. For example, i) erase a interface as LDP ID ;-< , ii) routes summarization failure on ospf area,... IMO, BGP which on PE should has some way to know of LSP failure. This is for customer. -- Satoru Matsushima
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