Configuring 6Pe; Configuring Basic 6Pe - HP HPE FlexNetwork 7500 series Configuration Manual

Step
7. Enable BGP FRR.

Configuring 6PE

IPv6 provider edge (6PE) is a transition technology that uses MPLS to connect sparsely populated
IPv6 networks through an existing IPv4 backbone network. It is an efficient solution for ISP
IPv4/MPLS networks to provide IPv6 traffic switching capability.
Figure 67 Network diagram for 6PE
CE
IPv6 network
Customer site
6PE mainly performs the following operations:
•
6PE assigns a label to IPv6 routing information received from a CE router, and sends the
labeled IPv6 routing information to the peer 6PE device through an MP-BGP session. The peer
6PE device then forwards the IPv6 routing information to the attached customer site.
•
6PE provides tunnels over the IPv4 backbone so the IPv4 backbone can forward packets for
IPv6 networks. The tunnels can be GRE tunnels, MPLS LSPs, or MPLS TE tunnels.
•
Upon receiving an IPv6 packet, 6PE adds an inner tag (corresponding to the IPv6 packet) and
then an outer tag (corresponding to the public network tunnel) to the IPv6 packet. Devices in the
IPv4 backbone network forwards the packet based on the outer tag. When the peer 6PE device
receives the packet, it removes the outer and inner tags and forwards the original IPv6 packet to
the attached customer site.
To implement exchange of IPv6 routing information, you can configure IPv6 static routing, an IPv6
IGP protocol, or IPv6 BGP between CE and 6PE devices.
For more information about MPLS, MPLS TE, CE, and P, see MPLS Configuration Guide. For more
information about GRE, see Layer 3—IP Services Configuration Guide.

Configuring basic 6PE

Before you configure 6PE, perform the following tasks:
•
Establish tunnels in the IPv4 backbone network (see Layer 3—IP Services Configuration
Guide).
•
Configure basic MPLS on 6PE devices (see MPLS Configuration Guide).
Command
•
(Method 1) Enable BGP
FRR for the address
family:
pic
•
(Method 2) Apply a
routing policy to FRR for
the address family:
fast-reroute
route-policy
route-policy-name
IPv4/MPLS network
IBGP
6PE
P
308
Remarks
By default, BGP FRR is disabled.
Method 1 might result in routing loops.
Use it with caution.
By default, no routing policy is
applied.
The apply fast-reroute
backup-nexthop and apply ipv6
fast-reroute backup-nexthop
commands can take effect in the
applied routing policy. Other apply
commands do not take effect.
CE
6PE
IPv6 network
Customer site