Re: BGP SoO

Well.........It won't surprise me if the newer versions work that way, but
the version/s that i tested this feature required the command, i can go back
and test it and let you know my findings. Have you tested this?

On Thu, Jun 9, 2011 at 6:11 PM, Bilal Hansrod <bilal.hansrod_at_gmail.com>wrote:

> Hello experts,
>
> Anyone who read this post able to answer my below query or perhaps Narbik
> who wrote this lab :). Can we implement the solution without outgoing map
> and only with incoming map or neighbors command.
>
> After conducting more research , the below posts mention that outgoing map
> is not required.
>
> https://supportforums.cisco.com/message/963149
>
>
> Thanks in advance-
>
> Bilal Hansrod
>
> On Thu, Jun 9, 2011 at 10:10 PM, Bilal Hansrod <bilal.hansrod_at_gmail.com
> >wrote:
>
> > Hello Everyone,
> >
> > I am having difficulty understanding one of the Narbik's BGP SoO lab.
> Here
> > is the lab setup removing unnecessary components :
> >
> > R4 acting as a PE is dual homed to R5 CE via FR p-2-p and serial link. R5
> > (CE) is advertising it's loopback 5.5.5.5 to R4 via link and it learned
> same
> > route back from R4. The BGP table on R5 looks like this:
> >
> > R5#show ip bgp
> >
> > BGP table version is 37, local router ID is 5.5.5.5
> >
> > 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
> >
> > * 1.0.0.0 10.1.100.4 0 65001 65015 i
> >
> > *> 10.1.45.4 0 65001 65001 i
> >
> > * 5.0.0.0 10.1.100.4 0 65001 65015 i
> >
> > *> 0.0.0.0 0 32768 i
> >
> > * 192.168.1.0 10.1.100.4 0 65001 65015 i
> >
> > *> 10.1.45.4 0 65001 65001 i
> >
> > * 192.168.5.0 10.1.100.4 0 65001 65015 i
> >
> > *> 0.0.0.0 0 32768 i
> >
> > Once I implement the BGP SoO via route-map or neighbour command, the BGP
> > table on R5 stop learning it's loopback 5.5.5.5 from frame connection.
> >
> > R5#show ip bgp
> >
> > BGP table version is 43, local router ID is 5.5.5.5
> >
> > 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
> >
> > * 1.0.0.0 10.1.100.4 0 65001 65015 i
> >
> > *> 10.1.45.4 0 65001 65001 i
> >
> > *> 5.0.0.0 0.0.0.0 0 32768 i
> >
> > * 192.168.1.0 10.1.100.4 0 65001 65015 i
> >
> > *> 10.1.45.4 0 65001 65001 i
> >
> > *> 192.168.5.0 0.0.0.0 0 32768 i
> >
> > It's all as per plan:
> >
> > R4 Configuration before BGP SoO
> >
> > router bgp 65001
> >
> > no bgp default ipv4-unicast
> >
> > bgp log-neighbor-changes
> >
> > neighbor 3.3.3.3 remote-as 65001
> >
> > neighbor 3.3.3.3 update-source Loopback0
> >
> > !
> >
> > address-family vpnv4
> >
> > neighbor 3.3.3.3 activate
> >
> > neighbor 3.3.3.3 send-community extended
> >
> > exit-address-family
> >
> > !
> >
> > address-family ipv4 vrf CB
> >
> > neighbor 10.1.45.5 remote-as 65015
> >
> > neighbor 10.1.45.5 activate
> >
> > neighbor 10.1.45.5 as-override
> >
> > neighbor 10.1.100.5 remote-as 65015
> >
> > neighbor 10.1.100.5 activate
> >
> > no synchronization
> >
> > exit-address-family
> >
> > R4 Configuration after BGP SoO
> >
> > router bgp 65001
> >
> > no bgp default ipv4-unicast
> >
> > bgp log-neighbor-changes
> >
> > neighbor 3.3.3.3 remote-as 65001
> >
> > neighbor 3.3.3.3 update-source Loopback0
> >
> > !
> >
> > address-family vpnv4
> >
> > neighbor 3.3.3.3 activate
> >
> > neighbor 3.3.3.3 send-community extended
> >
> > exit-address-family
> >
> > !
> >
> > address-family ipv4 vrf CB
> >
> > neighbor 10.1.45.5 remote-as 65015
> >
> > neighbor 10.1.45.5 activate
> >
> > neighbor 10.1.45.5 as-override
> >
> > neighbor 10.1.45.5 soo 65015:1
> >
> > neighbor 10.1.100.5 remote-as 65015
> >
> > neighbor 10.1.100.5 activate
> >
> > neighbor 10.1.100.5 soo 65015:1
> >
> > no synchronization
> >
> > exit-address-family
> >
> > Now back to Narbik's configuration after BGP SoO on R4, the results are
> > same if I do below configuration
> >
> > route-map TST permit 10
> >
> > set extcommunity soo 1:105
> >
> > ip extcommunity-list 1 permit soo 1:105
> >
> > route-map TEST deny 10
> >
> > match extcommunity 1
> >
> > route-map TEST permit 90
> >
> > router bgp 65001
> >
> > no bgp default ipv4-unicast
> >
> > bgp log-neighbor-changes
> >
> > neighbor 3.3.3.3 remote-as 65001
> >
> > neighbor 3.3.3.3 update-source Loopback0
> >
> > !
> >
> > address-family vpnv4
> >
> > neighbor 3.3.3.3 activate
> >
> > neighbor 3.3.3.3 send-community extended
> >
> > exit-address-family
> >
> > !
> >
> > address-family ipv4 vrf CB
> >
> > neighbor 10.1.45.5 remote-as 65015
> >
> > neighbor 10.1.45.5 activate
> >
> > neighbor 10.1.45.5 as-override
> >
> > neighbor 10.1.45.5 route-map TST in
> >
> > neighbor 10.1.45.5 route-map TEST out
> >
> > neighbor 10.1.100.5 remote-as 65015
> >
> > neighbor 10.1.100.5 activate
> >
> > neighbor 10.1.100.5 route-map TST in
> >
> > neighbor 10.1.100.5 route-map TEST out
> >
> > no synchronization
> >
> > exit-address-family
> >
> > R5 Configuration:
> >
> > router bgp 65015
> > no synchronization
> > bgp log-neighbor-changes
> > network 5.0.0.0
> > network 192.168.5.0
> > neighbor 10.1.45.4 remote-as 65001
> > neighbor 10.1.100.4 remote-as 65001
> > neighbor 10.1.100.4 allowas-in
> > no auto-summary
> >
> >
> >
> > I'm confused as why I am getting same results in terms on R5 doesn't
> learn
> > it's loopback 5.5.5.5 when we implement configuration in two different
> ways.
> > The first configuration is simple and do the same task and Narbik
> > configuration provide same results.
> >
> > I am sure, if I am missing something. Can anyone please shed some light
> on
> > my ignorance. I apologise if the post is confusing and long, but will be
> > highly appreciated, is some please help.
> >
> > Thanks,
> >
> > Bilal Hansrod
>
>
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-- 
*Narbik Kocharians
*CCSI#30832, CCIE# 12410 (R&S, SP, Security)
www.MicronicsTraining.com <http://www.micronicstraining.com/>
Sr. Technical Instructor
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