The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] on documenting ECMP (was on the mpls oam framework)
In message <B99995113B318D44BBE87DC50092EDA90C0D5513@nj7460exch006u.ho.lucent.c om>, "Busschbach, Peter B (Peter)" writes: > Thanks, Curtis. You make a convincing argument. > > One last question: > > What happens with RSVP-TE messages at an ECMP split? Suppose a source node se > nds a Path message requesting reservation of 10 Mb/s of bandwidth. When it re > aches the ECMP split, will that router generate two Path messages, each reque > sting 5 Mb/s, and forward them along the two equal-cost paths to the destinat > ion? > > Peter Peter, This email thread has a life of its own. Not a comment to you but maybe I should be appologizing for the email bandwidht I've used up. I did try to answer that in another response. Briefly, at a hierarchical link you have a logical link so if you ask for 10 mb/s it has to find 10 mb/s. If its a bundle it finds 10 mb/s on a single component. If it is load spliting, it may split two ways in effect taking 5 mb/s from each side. Obviously it has to have 5 mb/s available on each component LSP of the hierarchical LSP to do so. Keep in mind that how a LSR decides how much bandwidth to allocate to a hierarchical LSP and when to change this allocation is not defined. [Lots of room for innovation. The ITU guys are gonna hate it. And now that its been brought up we may end up spending a lot of time explaining why it will interoperate. :) ] Curtis
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