Configuring Ipv6 Vpns - Juniper JUNOSE 11.2.X BGP AND MPLS Configuration Manual

JunosE 11.2.x BGP and MPLS Configuration Guide

Configuring IPv6 VPNs

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The JunosE Software supports IPv6 VPNs tunneled over an MPLS IPv4 backbone. A
service provider can offer IPv4 VPN services, IPv6 VPN services, or both. MPLS over IPv6
is not currently supported. MPLS base tunnels to IPv6 destinations as tunnel endpoints
are not supported, so you cannot establish an MPLS IPv6 backbone.
NOTE: You must configure an IPv6 interface in the parent VR for IPv6 VPNS to work.
BGP can negotiate VPNv6 capability without having to negotiate the IPv6 capability.
BGP next-hop encoding varies depending on whether the backbone is IPv4 or IPv6. In
the JunosE Software implementation for IPv6 VPNs, the BGP next hops in the MP-BGP
update message follow the convention for BGP next-hop encoding for IPv4 backbone.
If an E Series router receives a BGP next hop that follows the encoding for an
MPLS-enabled IPv6 backbone, that BGP next hop is treated as unreachable because
currently no MPLS base tunnel to the native IPv6 tunnel endpoint address can exist.
The PE routers have both IPv4 and IPv6 capabilities. They maintain IPv6 VRFs for their
IPv6 sites and encapsulate IPv6 traffic in MPLS frames that are then sent into the MPLS
core network.
Link-local scope addresses cannot be used for reachability across IPv6 VPN sites and
can never be advertised by means of MP-BGP to remote PE routers. Global scope
addresses are expected to be used within and across IPv6 VPN Sites.
All features previously supported for BGP/MPLS IPv4 VPNs, such as policy-based routing,
redistribution to and from other protocols, aggregation, route-flap dampening, and so
on are also supported for BGP/MPLS IPv6 VPNs.
Use to configure the router or VRF to exchange IPv4 or IPv6 addresses by creating the
specified address family.
IPv4 and IPv6 addresses can be exchanged in unicast, multicast, or VPN mode.
The default setting is to exchange IPv4 addresses in unicast mode from the default
router.
Creating an address family for a VRF automatically disables both synchronization and
automatic summarization for that VRF.
This command takes effect immediately.
Examples
host1:vr1(config-router)#address-family ipv4 multicast
host1:vr1(config-router)#address-family ipv4 unicast
host1:vr1(config-router)#address-family ipv4 unicast vrf vr2
host1:vr1(config-router)#address-family vpvn4 unicast
host1:vr1(config-router)#address-family vpnv6 unicast ecmplabel
host1:vr1(config-router)#address-family ipv6 multicast
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