Hi, On 15 November 2010 03:53, Ibrahim Abo Zaid <[email protected]> wrote: > Hi all > > I need to know if RSVP supports over-provisioning of TE tunnels on links or > there is CAC mechanism ? > can the current reservation on a single link exceed maximum-bandwidth
No, you can not overbook the link over the maximum-bandwidth. > also if auto-bw adjustment isn't enabled , is the signaled BW is reserved > for good even if no traffic load uses the tunnel ? That is correct, the reservations are static. > and if RSVP isn't used as QoS to guarantee BW in TE-links , how BW can be > reserved for different LSP on TE-link ? RSVP-TE is not really a QoS tool. It allows you to route tunnels through the network according to some arbitrary constrains (bandwidth being one of them) but it does not have ability to enforce the bandwidth limits. You can easily send more bandwidth then the reservation down the tunnel. > i can think only about assigning each tunnel with EXP value and apply > policy-map matches different EXP and assign BW , any other thoughts ? The only way to enforce the tunnel bandwidth requirements is to make sure, that the ingress traffic from the CEs is policed/shaped so it does not exceed the reservation. You can also use auto-bandwidth, but that only adjusts the tunnel requirements every now and then (and you don't wan't it any more often anyway), so you can still exceed the initial requirements. Using EXP bits will work only if you have a up to 8 tunnels going through any individual node (head, transit or tail), otherwise you're going to run out of possible EXP values to distinguish the tunnels. kind regards pshem _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
