IPv6 over MPLS VPN

6VPE: IPv6 over MPLS VPN

6VPE can be compared to a regular IPv4 MPLS VPN Provider Edge with the addition of IPv6 support within a VRF. Providers logically separate routing table entries for VPN member devices. 6VPE can be deployed over an existing IPv4 backbone and does not require modification of the MPLS core routers.

 :CEs Configuration

CE1 router:

ipv6 unicast-routing
ipv6 cef

interface Loopback0
 no ip address
 ipv6 address FACE::1/128

 interface FastEthernet1/0
 no ip address
 speed auto
 duplex auto
 ipv6 address 2001:2222::1/124

 router bgp 65022
 bgp router-id 1.1.1.1
 no bgp default ipv4-unicast
 bgp log-neighbor-changes
 neighbor 2001:2222::2 remote-as 65025
 !
 address-family ipv6
  redistribute connected
  no synchronization
  network FACE::1/128
  neighbor 2001:2222::2 activate
 exit-address-family

 CE2 router:

 ipv6 unicast-routing
 ipv6 cef

interface Loopback0
 no ip address
 ipv6 address FACE::2/128
 ipv6 enable

 interface FastEthernet1/0
 no ip address
 speed auto
 duplex auto
 ipv6 address 2001:2212::2/124

 router bgp 65022
 bgp router-id 2.2.2.2
 no bgp default ipv4-unicast
 bgp log-neighbor-changes
 neighbor 2001:2212::1 remote-as 65025
 !
 address-family ipv4
  no synchronization
  neighbor 2001:2212::1 activate
  no auto-summary
 exit-address-family
 !
 address-family ipv6
  redistribute connected
  no synchronization
  network FACE::2/128
  neighbor 2001:2212::1 activate
 exit-address-family

 6VPE Configuration:

6VPE1:

 vrf definition CUST1
 rd 1:100
 !
 address-family ipv6
 route-target export 1:100
 route-target import 1:100
 exit-address-family

 ipv6 unicast-routing
ipv6 cef
mpls label protocol ldp

interface Loopback0
 ip address 172.20.31.11 255.255.255.255
 ip router isis

 interface FastEthernet1/0
 vrf forwarding CUST1
 no ip address
 speed auto
 duplex auto
 ipv6 address 2001:2222::2/124
 ipv6 enable


 router bgp 65025
 no bgp default ipv4-unicast
 bgp log-neighbor-changes
 neighbor 172.20.31.12 remote-as 65025
 neighbor 172.20.31.12 update-source Loopback0
 !       
 !                
 address-family vpnv6    /*/Address-family VPNv6 is configured on 6VPE routers for iBGP /*/
  neighbor 172.20.31.12 activate
  neighbor 172.20.31.12 send-community extended
 exit-address-family
 !       
 address-family ipv6 vrf CUST1
  redistribute connected
  no synchronization
  neighbor 2001:2222::1 remote-as 65022
  neighbor 2001:2222::1 activate /*/There is eBGP connection between 6VPE and CE routers/*/
  neighbor 2001:2222::1 as-override
 exit-address-family


6VPE2:
!

 ipv6 unicast-routing
ipv6 cef
mpls label protocol ldp
!
vrf definition CUST1
 rd 1:100
 !
 address-family ipv6
 route-target export 1:100
 route-target import 1:100
 exit-address-family
!
interface Loopback0
 ip address 172.20.31.12 255.255.255.255
 ip router isis
 !
 interface FastEthernet1/1
 vrf forwarding CUST1
 no ip address
 speed auto
 duplex auto
 ipv6 address 2001:2212::1/124
 !
 !
 router bgp 65025
 no synchronization
 bgp log-neighbor-changes
 neighbor 172.20.31.11 remote-as 65025
 neighbor 172.20.31.11 update-source Loopback0
 no auto-summary
 !       
 address-family vpnv6
  neighbor 172.20.31.11 activate
  neighbor 172.20.31.11 send-community extended
 exit-address-family
 !       
 address-family ipv6 vrf CUST1
  redistribute connected
  no synchronization
  neighbor 2001:2212::2 remote-as 65022
  neighbor 2001:2212::2 activate
  neighbor 2001:2212::2 as-override
 exit-address-family
 !

 Test:

6VPE2# show bgp vpnv6 unicast vrf CUST1
BGP table version is 9, local router ID is 172.20.31.12
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, m multipath, b backup-path, x best-external
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
Route Distinguisher: 1:100 (default for vrf CUST1)
*> 2001:2212::/124  ::                       0         32768 ?
*                   2001:2212::2             0             0 65022 ?
*>i2001:2222::/124  ::FFFF:172.20.31.11
                                             0    100      0 ?
*>iFACE::1/128      ::FFFF:172.20.31.11
                                             0    100      0 65022 i
*> FACE::2/128      2001:2212::2             0             0 65022 i

6VPE2#show bgp vpnv6 unicast vrf CUST1 FACE::1/128
BGP routing table entry for [1:100]FACE::1/128, version 7
Paths: (1 available, best #1, table CUST1)
  Advertised to update-groups:
     5        
  65022
    ::FFFF:172.20.31.11 (metric 30) from 172.20.31.11 (172.20.31.11)
      Origin IGP, metric 0, localpref 100, valid, internal, best
      Extended Community: RT:1:100
      mpls labels in/out nolabel/22  /*/Label imposition bottom lable/*/
6VPE2#sh ip ce
6VPE2#sh ip cef 172.20.31.11
172.20.31.11/32
  nexthop 172.16.2.1 FastEthernet1/0 label 19 /*/Label imposition Top lable/*/

CE2#sh ipv6 route
IPv6 Routing Table - default - 6 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2
       IA - ISIS interarea, IS - ISIS summary, D - EIGRP, EX - EIGRP external
       ND - Neighbor Discovery
       O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
C   2001:2212::/124 [0/0]
     via FastEthernet1/0, directly connected
L   2001:2212::2/128 [0/0]
     via FastEthernet1/0, receive
B   2001:2222::/124 [20/0]
     via FE80::C804:14FF:FE10:1D, FastEthernet1/0
B   FACE::1/128 [20/0]
     via FE80::C804:14FF:FE10:1D, FastEthernet1/0
LC  FACE::2/128 [0/0]
     via Loopback0, receive
L   FF00::/8 [0/0]
     via Null0, receive
CE2#ping FACE::1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FACE::1, timeout is 2 seconds:
!!!!!

Video :

 source :http://www.cisco.com/web/about/ac123/ac147/archived_issues/ipj_8-2/ipv6.html