Community strings don't effect inbound traffic, right? Is there really no good way to influence inbound traffic?
James Urwiller Network Operations Manager CCNA 11567125 American Broadband 402-426-6257 - Office 402-278-1875 - Cell 402-426-6273 - Fax [email protected] On 3/1/13 11:25 AM, "Mack McBride" <[email protected]> wrote: >You can use conditional advertisement to do what you are wanting to do. >But as Randy mentioned you should really use communities with your >upstreams to influence traffic. >If communities don't work then consider conditional advertisement. >http://www.cisco.com/en/US/docs/ios/12_0/np1/configuration/guide/1cbgp.htm >l#wp9071 >If you advertise your deaggregates you should still advertise your >aggregate block. >That allows those of us who don't care about your traffic engineering >desires but >do care about the routing table size to drop your deaggregates. >At some point a lot of providers are going to be dropping deaggregates. > >LR Mack McBride >Network Architect > >-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of James Urwiller >Sent: Thursday, February 28, 2013 8:12 PM >To: [email protected] >Subject: [c-nsp] BGP advertisements more specific than IGP > >I have a BGP multi-homed invironment that I am having problems balancing >inbound traffic, besides prepends which don't seem to be helping anymore, >I have heard that announcing my networks more specifically could also >influence inbound traffic. My question is, for example... If I have a >/23 that I am using as a /23 in OSPF, can I announce that in BGP more >specifically (2, /24's) without having to them break it up internally as >well? What I foresee happening is this.. > >Example: >BGP: >Network 192.168.0.0/24 >Network 192.168.1.0/24 > >OSPF: >Network 192.168.0.0/23 > >I would think in this scenario, the IP addresses 192.168.1.0 and >192.168.0.255 would not have a route in BGP, even though they are valid >addresses for use when used as a /23. Since I would be multi-homed, I >would still advertise the network as the aggregate /23 on the circuit I >don't want to take as much traffic, so would those IP addresses in this >scenario still work, but only through the circuit I advertise as the >aggregate?? > >James Urwiller >Network Operations Manager >CCNA 11567125 >American Broadband >402-426-6257 - Office >402-278-1875 - Cell >402-426-6273 - Fax >[email protected]<mailto:[email protected]> > >_______________________________________________ >cisco-nsp mailing list [email protected] >https://puck.nether.net/mailman/listinfo/cisco-nsp >archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
