Since you are using a back-to-back configuration (RFC2547bis option A
for the freaks ;-), there is no need for exchanging labels with the
other end.
The 'mpls bgp forwarding' command is only available in 12.xS trains,
so you would see it only on 7200 series. Then again, it will be
automatically put on the interface if you put the 'send-label' on a
BGP neighbor.
So again, you don't need to exchange labels with this kind of back-to-
back connectivity.
Rick Mur
CCIE2 #21946 (R&S / SP)
[email protected]
On 1 jun 2009, at 19:37, Bryan Bartik wrote:
Hello,
I am practicing some multi-vrf CE configurations and the guide I am
using shows that you need "mpls bgp forwarding" command on the CE-PE
sub-interfaces. I have got this to work without that command or BGP
send-label on the PE. Are these commands not required? It is really
just looking like a B2B VRF configuration. Without these commands,
am I at risk of losing some functionality? I can't see any thing
wrong, and I do have connectivity from CE to CE.
Reference:
http://www.cisco.com/en/US/docs/ios/12_2sb/12_2sba/feature/guide/vrflite.html
My CE config merely looks like this (addresses have been changed
from the document).
ip vrf VPNA
rd 800:1
route-target export 800:1
route-target import 800:1
!
ip vrf VPNB
rd 800:2
route-target export 800:2
route-target import 800:2
!
interface Loopback100
ip vrf forwarding VPNA
ip address 100.1.1.1 255.255.255.255
!
interface Loopback200
ip vrf forwarding VPNB
ip address 200.1.1.1 255.255.255.255
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
!
interface FastEthernet0/0.100
encapsulation dot1Q 100
ip vrf forwarding VPNA
ip address 192.168.100.2 255.255.255.0
!
interface FastEthernet0/0.200
encapsulation dot1Q 200
ip vrf forwarding VPNB
ip address 192.168.200.2 255.255.255.0
!
router bgp 65000
bgp router-id 100.1.1.1
no bgp default ipv4-unicast
bgp log-neighbor-changes
!
address-family ipv4 vrf VPNB
neighbor 192.168.200.1 remote-as 100
neighbor 192.168.200.1 activate
no synchronization
network 200.1.1.1 mask 255.255.255.255
exit-address-family
!
address-family ipv4 vrf VPNA
neighbor 192.168.100.1 remote-as 100
neighbor 192.168.100.1 activate
no synchronization
network 100.1.1.1 mask 255.255.255.255
exit-address-family
!
Thank you,
--
Bryan Bartik
CCIE #23707 (R&S), CCNP
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com
