MPLS lab
I have attached a MPLS lab found in the book i studied got few doubts in MPLS.
the configuration looks like this
PE-to-CE BGP-4 Configuration Example
hostname San Jose
!
interface serial0
description ** interface to FastFoods San Jose **
ip vrf forwarding FastFoods
ip address 195.12.2.6 255.255.255.252
!
interface serial 1
description ** interface to EuroBank San Francisco **
ip vrf forwarding EuroBank
ip address 10.2.1.6 255.255.255.252
!
router bgp 1
no bgp default ipv4-unicast
neighbor 194.22.15.1 remote-as 1
neighbor 194.22.15.1 update-source loopback0
!
address-family ipv4 vrf EuroBank
neighbor 10.2.1.5 remote-as 65002
neighbor 10.2.1.5 activate
no auto-summary
no synchronization
exit-address-family
!
address-family ipv4 vrf FastFoods
neighbor 195.12.2.5 remote-as 65001
neighbor 195.12.2.5 activate
no auto-summary
no synchronization
exit-address-family
!
address-family vpnv4
neighbor 194.22.15.1 activate
neighbor 194.22.15.1 send-community extended
exit-address-family
Here PE-CE configurtaion done using BGP and PE-PE configuration also using MP-BGP.
My doubts
1 ) in book it recently use word VPN-ipv4 address and IPV4 address.
as per my knowledge( am newbiee ) VPN-ipv4 address used at MPLS back bone ( i mean when trasnferring routes between PE-P-PE routers )
am i correct?
2 ) also i know from book that every session VPN-v4 or ip v4 sessions needs to be activated
by neighbor (ip ) activate command
But the the command in blue font have any activate keyword all other sessions have activate keyword why?
i mean
neighbor 194.22.15.1 activate should be there at global config ?
this command is specified below address-family vpnv4 .
fig http://i56.tinypic.com/ffbnty.png
the configuration looks like this
PE-to-CE BGP-4 Configuration Example
hostname San Jose
!
interface serial0
description ** interface to FastFoods San Jose **
ip vrf forwarding FastFoods
ip address 195.12.2.6 255.255.255.252
!
interface serial 1
description ** interface to EuroBank San Francisco **
ip vrf forwarding EuroBank
ip address 10.2.1.6 255.255.255.252
!
router bgp 1
no bgp default ipv4-unicast
neighbor 194.22.15.1 remote-as 1
neighbor 194.22.15.1 update-source loopback0
!
address-family ipv4 vrf EuroBank
neighbor 10.2.1.5 remote-as 65002
neighbor 10.2.1.5 activate
no auto-summary
no synchronization
exit-address-family
!
address-family ipv4 vrf FastFoods
neighbor 195.12.2.5 remote-as 65001
neighbor 195.12.2.5 activate
no auto-summary
no synchronization
exit-address-family
!
address-family vpnv4
neighbor 194.22.15.1 activate
neighbor 194.22.15.1 send-community extended
exit-address-family
Here PE-CE configurtaion done using BGP and PE-PE configuration also using MP-BGP.
My doubts
1 ) in book it recently use word VPN-ipv4 address and IPV4 address.
as per my knowledge( am newbiee ) VPN-ipv4 address used at MPLS back bone ( i mean when trasnferring routes between PE-P-PE routers )
am i correct?
2 ) also i know from book that every session VPN-v4 or ip v4 sessions needs to be activated
by neighbor (ip ) activate command
But the the command in blue font have any activate keyword all other sessions have activate keyword why?
i mean
neighbor 194.22.15.1 activate should be there at global config ?
this command is specified below address-family vpnv4 .
fig http://i56.tinypic.com/ffbnty.png
Comments
-
keenon
Member Posts: 1,922 ■■■■□□□□□□
add redistribute connected under your bgp process to include the vrf links in the bgp routing table. otherwise these links won't be pingable.Become the stainless steel sharp knife in a drawer full of rusty spoons -
hasitha257
Member Posts: 25 ■□□□□□□□□□
Yes
1. PE-PE you are running Multi Protocol BGP ( MP-BGP) by which you are enhancing BGP to carry VPNV4 routes ( by default BGP only carries IPV4 routes)
2. You have to activate neighbors on a per address family basis only , not under router bgp process . You can see the address family you are supporting with BGP peers by issuing "show ip bgp neighbor x.x.x.x"