Native IPv6 eBGP peership between two switches on VRF

The following figure shows a sample network that contains native IPv6 eBGP peers on VRFs.

Configure the local AS first on GRT (and it is inherited by all VRFs), and then enable BGP on GRT/VRF.

You must configure the address-family ipv6 option for IPv6 peers, otherwise, peer-ship is formed, but no routing updates between them will take place.

You must configure the ebgp-multihop option for the given eBGP peer that is not on one of local subnets (remote peers), otherwise, peer-ship will not be formed.

Note

The switch does not accept any configuration command for BGP in router-vrf configuration mode unless a BGP instance associated to the VRF context is created. You can use ip bgp command in router-vrf configuration mode to create a BGP instance on VRF.

R1 configuration

#
# VRF CONFIGURATION
#

ip vrf vrf1 vrfid 1
router vrf vrf1
exit
ip vrf vrf2 vrfid 2
router vrf vrf2
exit
#

# PORT CONFIGURATION - PHASE I
#

interface GigabitEthernet 1/1
encapsulation dot1q
exit

#                   
# VLAN CONFIGURATION
#

vlan members remove 1 1/1,1/46
vlan create 100 type port-mstprstp 0
vlan members 100 1/1 portmember
interface Vlan 100
ip address 100.1.1.1 255.255.255.0 1 
ipv6 interface mac-offset 1
ipv6 interface enable
ipv6 interface address 2001:0:100:0:0:0:0:1/64
exit
vlan create 101 type port-mstprstp 0
vlan members 101 1/1 portmember
interface Vlan 101
vrf vrf1
ip address 101.1.1.1 255.255.255.0 2 
ipv6 interface mac-offset 2
ipv6 interface enable
ipv6 interface address 2001:0:101:0:0:0:0:1/64
exit
vlan create 102 type port-mstprstp 0
vlan members 102 1/1 portmember
interface Vlan 102
vrf vrf2
ip address 102.1.1.1 255.255.255.0 3 
ipv6 interface mac-offset 3
ipv6 interface enable
ipv6 interface address 2001:0:102:0:0:0:0:1/64
ipv6 forwarding

exit

#
# PORT CONFIGURATION - PHASE II
#

interface GigabitEthernet 1/1
default-vlan-id 100
no shutdown
exit

#
# CIRCUITLESS IPV6 INTERFACE CONFIGURATION - GlobalRouter 
#

interface loopback 1
ipv6 interface address 1:1:1:1:0:0:0:1/128

exit             #
# CIRCUITLESS IPV6 INTERFACE CONFIGURATION - VRF 
#

interface loopback 2
ipv6 interface address 11:1:1:1:0:0:0:1/128 vrf vrf1
exit
interface loopback 3
ipv6 interface address 12:1:1:1:0:0:0:1/128 vrf vrf2
exit


#
# BGP CONFIGURATION - GlobalRouter
#

router bgp
no synchronization
exit
router bgp 1000 enable
router bgp
network 1:1:1:1:0:0:0:1/128 metric 100000
neighbor "2001:0:100:0:0:0:0:2"
neighbor 2001:0:100:0:0:0:0:2 remote-as 10000
neighbor 2001:0:100:0:0:0:0:2 next-hop-self
neighbor 2001:0:100:0:0:0:0:2 ebgp-multihop
neighbor 2001:0:100:0:0:0:0:2 address-family ipv6
neighbor 2001:0:100:0:0:0:0:2 update-source 2001:0:100:0:0:0:0:1
neighbor 2001:0:100:0:0:0:0:2 enable
exit#
# BGP CONFIGURATION - VRF
#
router vrf vrf1
ip bgp
no ip bgp synchronization
ip bgp enable
ip bgp network 11:1:1:1:0:0:0:1/128 metric 100000
ip bgp neighbor "2001:0:101:0:0:0:0:2"
ip bgp neighbor 2001:0:101:0:0:0:0:2 remote-as 10000
ip bgp neighbor 2001:0:101:0:0:0:0:2 next-hop-self
ip bgp neighbor 2001:0:101:0:0:0:0:2 ebgp-multihop
ip bgp neighbor 2001:0:101:0:0:0:0:2 address-family ipv6 
ip bgp neighbor 2001:0:101:0:0:0:0:2 update-source 2001:0:101:0:0:0:0:1
ip bgp neighbor 2001:0:101:0:0:0:0:2 enable
exit
router vrf vrf2
ip bgp
no ip bgp synchronization
ip bgp enable
ip bgp network 12:1:1:1:0:0:0:1/128 metric 100000
ip bgp neighbor "2001:0:102:0:0:0:0:2"
ip bgp neighbor 2001:0:102:0:0:0:0:2 remote-as 10000
ip bgp neighbor 2001:0:102:0:0:0:0:2 next-hop-self
ip bgp neighbor 2001:0:102:0:0:0:0:2 ebgp-multihop
ip bgp neighbor 2001:0:101:0:0:0:0:2 address-family ipv6 
ip bgp neighbor 2001:0:102:0:0:0:0:2 update-source 2001:0:102:0:0:0:0:1
ip bgp neighbor 2001:0:102:0:0:0:0:2 enable
exit

R2 configuration

#
# VRF CONFIGURATION
#

ip vrf vrf1 vrfid 1
router vrf vrf1
exit
ip vrf vrf2 vrfid 2
router vrf vrf2
exit

#
# PORT CONFIGURATION - PHASE I
#

interface GigabitEthernet 1/1
encapsulation dot1q

exit

#
# VLAN CONFIGURATION
#

vlan members remove 1 1/1
vlan create 100 type port-mstprstp 0
vlan members 100 1/1 portmember
interface Vlan 100

ip address 100.1.1.2 255.255.255.0 1 
ipv6 interface mac-offset 1
ipv6 interface enable
ipv6 interface address 2001:0:100:0:0:0:0:2/64
ipv6 forwarding

exit
vlan create 101 type port-mstprstp 0
vlan members 101 1/1 portmember
interface Vlan 101
vrf vrf1
ip address 101.1.1.2 255.255.255.0 2 
ipv6 interface mac-offset 2
ipv6 interface enable
ipv6 interface address 2001:0:101:0:0:0:0:2/64
ipv6 forwarding

exit
vlan create 102 type port-mstprstp 0
vlan members 102 1/1 portmember
interface Vlan 102
vrf vrf2
ip address 102.1.1.2 255.255.255.0 3 

ipv6 interface mac-offset 3
ipv6 interface enable
ipv6 interface address 2001:0:102:0:0:0:0:2/64
ipv6 forwarding

exit

#
# PORT CONFIGURATION - PHASE II
#

interface GigabitEthernet 1/1
default-vlan-id 100
no shutdownexit

#
# CIRCUITLESS IPV6 INTERFACE CONFIGURATION - GlobalRouter 
#

interface loopback 1
ipv6 interface address 2:2:2:2:0:0:0:2/128
exit

                    
#
# CIRCUITLESS IPV6 INTERFACE CONFIGURATION - VRF 
#

interface loopback 2
ipv6 interface address 21:2:2:2:0:0:0:2/128 vrf vrf1
exit
interface loopback 3
ipv6 interface address 22:2:2:2:0:0:0:2/128 vrf vrf2
exit


#
# BGP CONFIGURATION - GlobalRouter
#

router bgp
no synchronization
exit
router bgp 10000 enable
router bgp
neighbor "2001:0:100:0:0:0:0:1"
neighbor 2001:0:100:0:0:0:0:1 remote-as 1000
neighbor 2001:0:100:0:0:0:0:1 next-hop-self
neighbor 2001:0:100:0:0:0:0:1 ebgp-multihop
neighbor 2001:0:100:0:0:0:0:1 address-family ipv6
neighbor 2001:0:100:0:0:0:0:1 update-source 2001:0:100:0:0:0:0:2
neighbor 2001:0:100:0:0:0:0:1 enableexit

#
# BGP CONFIGURATION - VRF
#

router vrf vrf1
ip bgp
no ip bgp synchronization
ip bgp enable
ip bgp neighbor "2001:0:101:0:0:0:0:1"
ip bgp neighbor 2001:0:101:0:0:0:0:1 remote-as 1000
ip bgp neighbor 2001:0:101:0:0:0:0:1 next-hop-self
ip bgp neighbor 2001:0:101:0:0:0:0:1 ebgp-multihop
ip bgp neighbor 2001:0:101:0:0:0:0:1 address-family ipv6 
ip bgp neighbor 2001:0:101:0:0:0:0:1 update-source 2001:0:101:0:0:0:0:2
ip bgp neighbor 2001:0:101:0:0:0:0:1 enable
exit
router vrf vrf2
ip bgp
no ip bgp synchronization
ip bgp enable
ip bgp neighbor "2001:0:102:0:0:0:0:1"
ip bgp neighbor 2001:0:102:0:0:0:0:1 remote-as 1000
ip bgp neighbor 2001:0:102:0:0:0:0:1 next-hop-self
ip bgp neighbor 2001:0:102:0:0:0:0:1 ebgp-multihop
ip bgp neighbor 2001:0:102:0:0:0:0:1 address-family ipv6 
ip bgp neighbor 2001:0:102:0:0:0:0:1 update-source 2001:0:102:0:0:0:0:2
ip bgp neighbor 2001:0:102:0:0:0:0:1 enable
exit