No that doesn't work very well, unless you make the rash assumption that all of Sprint's customers are in the same Autonomous System. We saw all sorts of goofy problems when I*STAR did this with MCI. The problems went away when the customer switched from I*STAR to UUNET/Canada :-) You need a community that will be announced to "customer" BGP sessions, but not to "peer" BGP sessions. Its not hard to do, but it does seem to be hard to explain to your standard order taker/sales staff. It also seems to confuse the heck out of the support folks when they need to troubleshoot things. It would really be nice if cisco's had a "show ip bgp neigh xxx out" command that showed what you are telling your neighbor. Essentially the inverse of the "show ip bgp neigh xxx route" command.
set community no-export?
It's the other direction that is the problem. How does he advertise routes to Sprint so that Sprint customers can reach him but without Sprint advertising his routes at exchange points? That's the other half of what he's asking for, and he can't do it unless Sprint sets up filters to do it for him. -- Sean Donelan, Data Research Associates, Inc, St. Louis, MO Affiliation given for identification not representation
On Sun, 4 May 1997, Sean Donelan wrote:
It also seems to confuse the heck out of the support folks when they need to troubleshoot things. It would really be nice if cisco's had a "show ip bgp neigh xxx out" command that showed what you are telling your neighbor. Essentially the inverse of the "show ip bgp neigh xxx route" command.
You mean like this? dgf>sh ip bgp nei 166.48.33.249 advertised-routes BGP table version is 1367259, local router ID is 131.103.20.1 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path <lots of stuff deleted> -dorian
On Sun, 4 May 1997, Sean Donelan wrote: ==>It also seems to confuse the heck out of the support folks when they ==>need to troubleshoot things. It would really be nice if cisco's had ==>a "show ip bgp neigh xxx out" command that showed what you are telling ==>your neighbor. Essentially the inverse of the "show ip bgp neigh xxx ==>route" command. In later versions: IOS (tm) 4500 Software (C4500-I-M), Version 11.1(9), RELEASE SOFTWARE (fc1) li-rt-01#show ip bgp nei w.x.y.z ? advertised-routes Display the routes advertised to an EBGP neighbor /cah
participants (3)
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Craig A. Huegen -
Dorian R. Kim -
Sean Donelan