Hi Scott I also am trying to configure the QPPB and i have been at it for several days. The problem is, in a MPLS network, when you configure the route-map to match bgp community and then apply it via table-map under route bgp, you see that when doing a show ip cef (the target network) you see it being tagged as qos-group # which is good. But when actual traffic going out an mpls interface, the policy map or rate-limit will not match the qos-group!! The qos-group exist only on the ipv4 label and not the mpls top label. Is it something to do with the PHP? i am having trouble getting the qos-group value to be on the top-most MPLS label.
Thanks in advance Gary On Dec 14, 2007 5:09 PM, Scott Morris <[EMAIL PROTECTED]> wrote: > No worries. it's good to be able to think through things like that, > because once you understand the options available to you, you'll be able to > get through any manipulation they ask you to do! > > HTH, > > > > Scott Morris, *CCIE**4** (R&S/ISP-Dial/Security/Service Provider) #4713, > JNCIE-M #153**, JNCIS-ER, CISSP, et al. > **CCSI/JNCI-M/JNCI-ER > *VP - Technical Training - IPexpert, Inc. > IPexpert Sr. Technical Instructor > > A Cisco Learning Partner - We Accept Learning Credits! > > [EMAIL PROTECTED] > > > > Telephone: +1.810.326.1444 > Fax: +1.810.454.0130 > http://www.ipexpert.com > > > > ------------------------------ > *From:* Aqbalali Arne [mailto:[EMAIL PROTECTED] > *Sent:* Friday, December 14, 2007 5:09 AM > *To:* [EMAIL PROTECTED]; [email protected] > > *Subject:* RE: [OSL | CCIE_SP] Rate limiting based on Community > > Thanks Scott, in fact i saw the same option yesterday in DQOS book for > QPPB and they have given an example for community itself. Thanks again. > > Aqbal > > > ------------------------------ > From: [EMAIL PROTECTED] > To: [EMAIL PROTECTED]; [email protected] > Subject: RE: [OSL | CCIE_SP] Rate limiting based on Community > Date: Thu, 13 Dec 2007 08:54:18 -0500 > > We frequently see communities used in order to do Remote Triggered Black > Hole Routing, which is essentially killing traffic based on particular > community values by rearranging the next-hop. > > I don't see why we couldn't use it for policing as well, but there isn't > any inherent mechanism of QoS or policing to match on BGP community. So we > would need to look at an architecture where there were dual next-hops to > really forward traffic. One path is "normal", the other is simply policed. > > There's a more formal option in place called QPPB (Qos Policy Propogation > via BGP) that you may want to look at. :) > > In a route-map, you can match on BGP communities then "set ip qos-group" > which is a non-transitive value. But that's a value that can then be used > in MQC to "match qos-group" and set any policing parameters. > > So there are a couple of options for you to play around with! > > HTH, > > > > Scott Morris, *CCIE**4** (R&S/ISP-Dial/Security/Service Provider) #4713, > JNCIE-M #153**, JNCIS-ER, CISSP, et al. > **CCSI/JNCI-M/JNCI-ER > *VP - Technical Training - IPexpert, Inc. > IPexpert Sr. Technical Instructor > > A Cisco Learning Partner - We Accept Learning Credits! > > [EMAIL PROTECTED] > > > > Telephone: +1.810.326.1444 > Fax: +1.810.454.0130 > http://www.ipexpert.com > > > > ------------------------------ > *From:* [EMAIL PROTECTED] [mailto: > [EMAIL PROTECTED] *On Behalf Of *Aqbalali Arne > *Sent:* Thursday, December 13, 2007 7:38 AM > *To:* [email protected] > *Subject:* [OSL | CCIE_SP] Rate limiting based on Community > > Hi, > > Is there any feature to rate limit the traffic when a router recieves BGP > routes with a particular community string attached. May be something to do > with DOS attack. > > Aqbal > > ------------------------------ > Post free auto ads on Yello Classifieds now! Try it > now!<http://ss1.richmedia.in/recurl.asp?pid=255> > > > ------------------------------ > Fly HYD-BLR for Rs.499 Log on to MakeMyTrip! Check it > out!<http://ss1.richmedia.in/recurl.asp?pid=266> >
