On Mon, Jan 19, 2009 at 09:06, Andrew Jimmy <[email protected]> wrote: > > What does meant by reserved and highwater bandwidth reservation exactly. Is > this something similar to police rate-limit or traffic shaping? Why do you > need to reserve bandwidth and in what circumstances ; what are the impacts? > > > > I will appreciate if someone can explain all of this in very simple words. > > > > juni...@nasa> show rsvp interface > > RSVP interface: 2 active > > Active Subscr- Static Available > Reserved Highwater > > Interface State resv iption BW BW BW > mark > > so-0/0/0.0 Up 0 100% 155.52Mbps 155.52Mbps 0bps > 0bps > > so-0/0/2.0 Up 1 100% 155.52Mbps 105.52Mbps 50Mbps > 50Mbps.
Reserved Bandwidth is the amount of bw currently requested/reserved by all LSPs using that interface. Highwater Bandwidth is the highest level that Reserved Bandwidth has reached (since the statistics were last cleared). A full explanation of the output fields can be found here: https://www.juniper.net/techpubs/software/junos/junos91/swcmdref-protocols/show-rsvp-interface.html (don't worry about the code version - this output has not changed much over a lot of versions). RSVP is the resource reservation protocol; when used for MPLS the resource it reserves is interface bandwidth (and a label). This is not for shaping or policing; this is part of how an LSPs path is determined. The bandwidth reservation is used for traffic engineering, in its simplest form this keeps new LSPs from being signaled across (potentially) saturated links. I highly recommend that you read chapters 7 and 8 of the JNCIS-M study guide (pdf available free: http://www.juniper.net/training/certification/JNCIS_studyguide.pdf) for more information on MPLS, RSVP and Traffic Engineering (TE) in JunOS. > > _______________________________________________ > juniper-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/juniper-nsp -- Chris Grundemann www.chrisgrundemann.com _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
