Thanks so much for your helpful explanation Tom :) Hunt
""Tom Martin"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Hunt, > > You are correct, there is nothing filtering the routes entering from > Router B, without local preference set higher on 10.1.1.1 (Router A?) for > the routes, nothing will prevent AS 202 from being used for other > destinations as well. > > More confusing to me is the configuration. > > I read the question as if Router B should only be used for packets > _originating_ from AS 202, which should use the T1 connection. In this > case an outbound filter would be appropriate, along with a community tag > of no-export. > > Even if this the reverse is true (which the configuration seems to > indicate), the as-path access-list is only setting local preference for > the AS 300 destination! It seems like the following access-list should > have been used: > > ip as-path access-list 1 permit ^202$ > > Then again, perhaps I have just totally misunderstood the question. Either > way, I hope that this helps. > > - Tom > > > On Mon, 04 Feb 2002 23:43:41 -0500, Hunt Lee wrote: > > > I have a Route-Map question that I'm very confused about: > > > > The scenario is from Caslow (p840), it is as follows: > > > > Company A has a full T3 connection to the Internet thru the ISP > > AAA-101.NET. Company B has a T1 connection to the Internet thru the ISP > > BBB-202.Net. Company A acquires Company B, but Company A wants to keep > > both Internet connections, with the exception of packets originating > > from the AS of BBB-202.Net (BBB-202.Net's AS is 202). All traffic > > originating from AS 202 will use the T1 Internet connection. > > > > Caslow states in order to do this, the following configs should be used > > on RouterB > > > > router bgp 1000 > > neighbor 10.1.1.1 remote-as 1000 > > neighbor 172.16.1.100 remote-as 202 > > neighbor 172.16.1.100 route-map AS-200-IN in > > > > no ip classless > > ip as-path access-list 1 permit _300$ > > > > route-map AS-200-IN permit 10 > > match as-path 1 > > set local-preference 200 > > > > route-map AS-200-IN permit 20 > > > > What I don't understand is: > > > > With the "set local-preference 200" statement, it directs the traffic > > (routes coming from AS 202 / neighbor 172.16.1.100) to go out via Router > > B. However, what makes the router not passing any other routes (not from > > AS 200)? Wouldn't they still be able to go out thru Router B as well? In > > consideration that the local preference has not been changed on the > > router. > > > > Any help will be greatly appreciated. > > > > Best Regards, > > Hunt Lee > > System Engineer > > WebCentral > > misconduct and Nondisclosure violations to [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=34703&t=34431 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
