Re: BGP SoO

Hi Narbik,

Did you get chance to test the scenario and collate the results. The
findings will proove if the issue was code or something else.

Thanks,

Bilal Hansrod

On Fri, Jun 10, 2011 at 9:39 PM, Bilal Hansrod <bilal.hansrod_at_gmail.com>wrote:

> Thank you Narbik for the reply- I implemented the configuration with only
> neighbor command and results are same. The configuration as below
>
>
> 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
> !
>
> Show ip bgp on R5 shows that 5.5.5.5 is not learned via R4 as expected.
>
> R5#show ip bgp
> BGP table version is 9, 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
>
> If I remove neighbor command with soo , than I have 5.5.5.5 learned via R4
> as well.
>
>
> 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
>
> The bgp table on R5 after removing soo on R4.
>
> R5#show ip bgp
> BGP table version is 5, 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
> R5#
>
> It would be highly appreciated, if you could test and let me know.
>
> Thanks once again for your help.
>
> Regards,
>
> Bilal Hansrod
>
>
>
>
>
> On Fri, Jun 10, 2011 at 4:41 PM, Narbik Kocharians <narbikk_at_gmail.com>wrote:
>
>> 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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Received on Mon Jun 27 2011 - 12:29:38 ART