From: zhutong (zhutong@xxxxxxxxxxxxxx)
Date: Tue May 22 2001 - 02:22:52 GMT-3
yes, you are right.
----- Original Message -----
From: "Philip Guo" <guo6688@hotmail.com>
To: <zhutong@ronghai.com.cn>; <ccielab@groupstudy.com>
Sent: Tuesday, May 22, 2001 12:32 PM
Subject: Re: BGP Route Selection
> I guess There is no IGP connection between these three routers.
> For example, R2 can not reach 192.168.20.49/28 internally. So it can not
> select as best route.
> Philip
>
>
> >From: "zhutong" <zhutong@ronghai.com.cn>
> >Reply-To: "zhutong" <zhutong@ronghai.com.cn>
> >To: "CCIE Mailist" <ccielab@groupstudy.com>
> >Subject: BGP Route Selection
> >Date: Tue, 22 May 2001 12:04:18 +0800
> >
> >I have three routers, R1 is in AS 1, R2 & R3 in AS100, following are there
> >configuratons,
> >and "show ip bgp" for R2 and R3, it seems not using the best path, why?
> >
> >R1
> >========================================
> >interface Loopback0
> > ip address 1.1.1.1 255.255.255.0
> >interface Serial1/0
> > ip address 192.168.20.17 255.255.255.240
> >interface Serial1/1
> > ip address 192.168.20.49 255.255.255.240
> >router bgp 1
> > network 1.0.0.0
> > neighbor 192.168.20.18 remote-as 100
> > neighbor 192.168.20.50 remote-as 100
> >
> >R2
> >========================================
> >interface FastEthernet0/0
> > ip address 192.168.20.65 255.255.255.240
> >interface Serial1/0
> > ip address 192.168.20.18 255.255.255.240
> >router bgp 100
> > bgp default local-preference 200
> > neighbor 192.168.20.17 remote-as 1
> > neighbor 192.168.20.17 weight 1000
> > neighbor 192.168.20.66 remote-as 100
> > neighbor 192.168.20.66 weight 3000
> >
> >R3
> >========================================
> >interface FastEthernet0/0
> > ip address 192.168.20.66 255.255.255.240
> >interface Serial1/0
> > ip address 192.168.20.50 255.255.255.240
> >router bgp 100
> > bgp default local-preference 300
> > neighbor 192.168.20.49 remote-as 1
> > neighbor 192.168.20.65 remote-as 100
> >
> >here are "show ip bgp" output
> >R1
> >-----------------------------------------------------------------
> > Network Next Hop Metric LocPrf Weight Path
> >*> 1.0.0.0 0.0.0.0 0 32768 i
> >
> >R2
> >-----------------------------------------------------------------
> > Network Next Hop Metric LocPrf Weight Path
> >*> 1.0.0.0 192.168.20.17 0 1000 1 i
> >* i 192.168.20.49 0 300 3000 1 i
> >
> >R3
> >-----------------------------------------------------------------
> > Network Next Hop Metric LocPrf Weight Path
> >* i1.0.0.0 192.168.20.17 0 200 0 1 i
> >*> 192.168.20.49 0 0 1 i
> >**Please read:http://www.groupstudy.com/list/posting.html
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