Alcatel 060320-10, Rev. B Configuration Manual page 153

Configuring BGP
BGP Peer Behavior using Local IPv6 Unicast Addresses
•
The local IPv6 address prefixes are exchanged between internal BGP (IBGP) speakers within the same
Autonomous System (AS), unless denied by explicit policy configuration.
•
As Exterior BGP (EBGP) peers between different AS ignore receipt of and do not advertise prefixes
with the well-known FC00::/7 prefix, prefixes longer than FC00::/7 can be configured for inter-site
communication.
•
There may be specific /48 or longer routes created for one or more Local IPv6 prefixes. In such a case,
explicit BGP configuration of peer policies must be configured to control learning/advertising of such
prefixes.
Configuring an IPv4 BGP Peer to Exchange IPv6 Prefixes
A BGP peer that is identified by its IPv4 address can be used to exchange IPv6 prefixes. However, to do
this both the peers should be enabled with IPv6 BGP unicast and should have interfaces that support IPv6
addresses. To configure an IPv4 BGP peer to exchange IPv6 prefixes, follow the steps mentioned below:
1
Create an IPv4 BGP peer with which the BGP speaker will establish peering using its IPv4 address
with the ip bgp neighbor
-> ip bgp neighbor 190.17.20.16
2
Assign an AS number to the IPv4 peer using the
to assign the peer created in Step 1 to AS number 200, you would enter:
-> ip bgp neighbor 190.17.20.16 remote-as 200
3
Enable IPv6 unicast capability for the IPv4 BGP peer using the
command, as shown:
-> ip bgp neighbor 190.17.20.16 activate-ipv6
4
Set the IPv6 next hop address for IPv6 prefixes advertised to the IPv4 BGP peer using the
ip bgp neighbor ipv6-nexthop
-> ip bgp neighbor 190.17.20.16 ipv6-nexthop 2001::1
5
Enable the BGP peer status using the
the status of the IPv4 BGP peer with an IPv4 address of 190.17.20.16, you would enter:
-> ip bgp neighbor 190.17.20.16 admin-state enable
Configuring an IPv6 BGP Peer to Exchange IPv6 Prefixes
To configure an IPv6 BGP peer to exchange IPv6 prefixes, follow the steps mentioned below:
1
Create an IPv6 BGP peer with which the BGP speaker will establish peering using its IPv6 address
with the ipv6 bgp neighbor
-> ipv6 bgp neighbor 2001::1
2
Assign an AS number to the IPv6 peer using the
ple, to assign the peer created in Step 1 to AS number 10, you would enter:
-> ipv6 bgp neighbor 2001::1 remote-as 10
3
Enable IPv6 unicast capability for the IPv6 BGP peer using the
command, as shown:
OmniSwitch AOS Release 7 Advanced Routing Configuration Guide
command, as shown:
command, as shown:
ip bgp neighbor admin-state
command, as shown:
ip bgp neighbor remote-as
ip bgp neighbor activate-ipv6
command. For example, to enable
ipv6 bgp neighbor remote-as
ipv6 bgp neighbor activate-ipv6
March 2011
Configuring BGP for IPv6
command. For example,
command. For exam-
page 3-69