Hello,
I have following setup. CE3 and CE4 are running bgp as a PC-CE protocol. CE3 and CE4 are configured in AS 34. routes are not exchanged between CE3 and CE4. Although I have configured 'allowas-in' on both CE3 and CE4. VPNV4 routes are exchanged between PE1 and PE2.
CE3-------PE1----PE2----CE4
Configuration:-
ios3
-------------------
int gi0/0
ip address 100.10.30.3 255.255.255.0
no sh
int lo0
ip address 3.3.3.3 255.255.255.255
router bgp 34
bgp router-id 3.3.3.3
template peer-session session12
remote-as 12
exit
neighbor 100.10.30.1 inherit peer-session session12
address-family ipv4 unicast
network 3.3.3.3 mask 255.255.255.255
neighbor 100.10.30.1 activate
neighbor 100.10.30.1 allowas-in
exit
XRV1
-------------------
vrf vrf1
address-family ipv4 unicast
export route-target 1:1
import route-target 2:2
exit
int gi0/0/0/0
vrf vrf1
ip address 100.10.30.1 255.255.255.0
no sh
int gi0/0/0/1
ip address 100.10.20.1 255.255.255.0
no sh
int lo0
ipv4 address 1.1.1.1 255.255.255.255
router isis 1
net 49.0001.1111.1111.1111.00
is-type level-2
address-family ipv4 unicast
metric-style wide
mpls ldp auto-config
exit
int gi0/0/0/1
address-family ipv4 unicast
exit
int lo0
address-family ipv4 unicast
exit
exit
route-policy pass
pass
exit
mpls ldp
exit
router bgp 12
address-family ipv4 unicast
exit
address-family vpnv4 unicast
exit
neighbor-group group12
remote-as 12
update-source lo0
address-family vpnv4 unicast
exit
neighbor-group group34
remote-as 34
address-family ipv4 unicast
route-policy pass in
route-policy pass out
exit
neighbor 2.2.2.2
use neighbor-group group12
vrf vrf1
rd 1:1
address-family ipv4 unicast
exit
neighbor 100.10.30.3
use neighbor-group group34
XRV2
-------------------
vrf vrf1
address-family ipv4 unicast
export route-target 2:2
import route-target 1:1
exit
int gi0/0/0/0
vrf vrf1
ip address 100.20.40.2 255.255.255.0
no sh
int gi0/0/0/1
ip address 100.10.20.2 255.255.255.0
no sh
int lo0
ipv4 address 2.2.2.2 255.255.255.255
mpls ldp
exit
router isis 1
net 49.0002.2222.2222.2222.00
is-type level-2
address-family ipv4 unicast
metric-style wide
mpls ldp auto-config
exit
int gi0/0/0/1
address-family ipv4 unicast
exit
int lo0
address-family ipv4 unicast
exit
exit
route-policy pass
pass
exit
router bgp 12
bgp router-id 2.2.2.2
address-family ipv4 unicast
exit
address-family vpnv4 unicast
exit
neighbor-group group12
remote-as 12
update-source lo0
address-family vpnv4 unicast
exit
neighbor-group group34
remote-as 34
address-family ipv4 unicast
route-policy pass in
route-policy pass out
exit
neighbor 1.1.1.1
use neighbor-group group12
vrf vrf1
rd 1:1
address-family ipv4 unicast
exit
neighbor 100.20.40.4
use neighbor-group group34
ios4
-----------------
int gi0/0
ip address 100.20.40.4 255.255.255.0
no sh
int lo0
ip address 4.4.4.4 255.255.255.255
router bgp 34
template peer-session session12
remote-as 12
exit
neighbor 100.20.40.2 inherit peer-session session12
address-family ipv4 unicast
network 4.4.4.4 mask 255.255.255.255
neighbor 100.20.40.2 activate
neighbor 100.20.40.2 allowas-in
exit
