BGP Site of Origin configuration

Networking CCNP Enterprise
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1

Hi @Network_Eric
in order to lab the SoO site of origin i`m using this lab

BGP Site-of-Origin Lab
BGP Site-of-Origin Lab1024×768 60.3 KB

the SoO tag value has to be configured at the PE side only . so, i`m going to use these configuration

R1#show running-config | section router
router eigrp 1
network 1.1.1.1 0.0.0.0
network 10.1.12.1 0.0.0.0
eigrp router-id 0.0.0.1
router bgp 14
bgp router-id 1.1.1.1
bgp log-neighbor-changes
neighbor 4.4.4.4 remote-as 14
neighbor 4.4.4.4 update-source Loopback0
!
address-family ipv4
neighbor 4.4.4.4 activate
exit-address-family
!
address-family vpnv4
neighbor 4.4.4.4 activate
neighbor 4.4.4.4 send-community extended
exit-address-family
!
address-family ipv4 vrf vrf-a
network 55.5.5.0 mask 255.255.255.0
neighbor 5.5.5.5 remote-as 56
neighbor 5.5.5.5 ebgp-multihop 5
neighbor 5.5.5.5 update-source Loopback1
neighbor 5.5.5.5 activate
neighbor 5.5.5.5 send-community both
neighbor 5.5.5.5 soo 1111:1111
exit-address-family
R4#show running-config | section router
router eigrp 1
network 4.0.0.0
network 10.1.34.0 0.0.0.255
eigrp router-id 0.0.0.4
router bgp 14
bgp router-id 4.4.4.4
bgp log-neighbor-changes
neighbor 1.1.1.1 remote-as 14
neighbor 1.1.1.1 update-source Loopback0
!
address-family ipv4
neighbor 1.1.1.1 activate
exit-address-family
!
address-family vpnv4
neighbor 1.1.1.1 activate
neighbor 1.1.1.1 send-community extended
exit-address-family
!
address-family ipv4 vrf vrf-c
neighbor 6.6.6.6 remote-as 56
neighbor 6.6.6.6 ebgp-multihop 5
neighbor 6.6.6.6 update-source Loopback1
neighbor 6.6.6.6 activate
neighbor 6.6.6.6 send-community
neighbor 6.6.6.6 soo 4444:4444
exit-address-family
R4#
the configuration here used on R1 PE-1 and R4 PE-4 is

neighbor x.x.x.x send-community both

-in order to enable the router to send the extended community SoO

neighbor x.x.x.x soo 1111:1111 or 4444:4444

this is the tag value will be used and assigned to each route received from CE-1 and CE-2.

but what i see on INE slides is this configuration :-

INE Slides
INE Slides789×464 122 KB

i don`t understand this configuration

how could the soo configured under the VRF ?

what is the difference between using this kind of configuration and the previous one i`m using ?

thanks

2

Hey Major,

Per neighbor SoO was added to BGP. Previously it needed to be configured with a route-map as shown in their slide. It can now be done with the commands right under the process. They both accomplish the same thing, your method is just the easier one.