Re: BGP Local-AS

From: PANDI MOORTHY (moorthypandi@gmail.com)
Date: Mon Nov 27 2006 - 06:13:35 ART


Its work for me

(R3) ------- (R4) --------- (R5) -------- (R7)
100 200(Local AS-500) (300) (400)

In this configuration R4 is using AS-500 for its peering with R5.

 Looks like this no-propend keyword only affect the updates send to R3, not
to R5

R3:

---
router bgp 100
 no synchronization
 bgp log-neighbor-changes
 network 3.3.3.0 mask 255.255.255.0
 neighbor 10.1.1.4 remote-as 200
 no auto-summary

interface Serial1 ip address 10.1.1.3 255.255.255.0 ip pim sparse-mode no ip route-cache clock rate 64000

R4: ---

interface Ethernet0 ip address 192.168.1.4 255.255.255.0 no ip route-cache

interface Serial1 ip address 10.1.1.4 255.255.255.0 no ip route-cache ! router bgp 200 no synchronization bgp log-neighbor-changes network 4.4.4.0 mask 255.255.255.0 neighbor 10.1.1.3 remote-as 100 neighbor 192.168.1.5 remote-as 300 neighbor 192.168.1.5 local-as 500 no-prepend no auto-summary

R5: ---

interface Ethernet0 ip address 192.168.1.5 255.255.255.0

interface Serial1 ip address 202.172.32.5 255.255.255.0

router bgp 300 no synchronization bgp log-neighbor-changes network 5.5.5.0 mask 255.255.255.0 neighbor 192.168.1.4 remote-as 500 neighbor 202.172.32.7 remote-as 400 no auto-summary

R3 bgp table without no-propend config

R3#show ip bgp BGP table version is 10, local router ID is 10.1.1.3 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, r RIB-failure, S Stale Origin codes: i - IGP, e - EGP, ? - incomplete

Network Next Hop Metric LocPrf Weight Path *> 3.3.3.0/24 0.0.0.0 0 32768 i *> 4.4.4.0/24 10.1.1.4 0 0 200 i *> 5.5.5.0/24 10.1.1.4 0 200 500 300 i R3#

R3 bgp table with no-propend config

R3#show ip bgp BGP table version is 8, local router ID is 10.1.1.3 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, r RIB-failure, S Stale Origin codes: i - IGP, e - EGP, ? - incomplete

Network Next Hop Metric LocPrf Weight Path *> 3.3.3.0/24 0.0.0.0 0 32768 i *> 4.4.4.0/24 10.1.1.4 0 0 200 i *> 5.5.5.0/24 10.1.1.4 0 200 300 i R3# R7:: ---- no changes to R7 bgp table

r0-TermServr#show ip bgp BGP table version is 12, local router ID is 1.1.1.1 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 *> 3.3.3.0/24 202.172.32.5 0 300 500 200 100 i *> 4.4.4.0/24 202.172.32.5 0 300 500 200 i *> 5.5.5.0/24 202.172.32.5 0 0 300 i r0-TermServr#

Regards. Pandi

On 11/28/06, Yoshe Rionando <Rionando@swadharma.com> wrote: > > There is an effect to configure : > neighbor xx.xx.xx..xx local-as AA no-prepend > > I think it not append the AS to the list. > I try this, but no effect appear. > > > Yoshe Rionando Y. > PT. Swadharma Duta Data > Network & System Engineering Dept. > Senior Network Engineer > phone : 62 21 8318881 > fax : 62 21 8297293 > mobile : 62 8159084895 > > _______________________________________________________________________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html



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