6VPE (IPv6 VPN Provider Edge Router)

18 Dec

CCIE, the beginning!

6VPE is an easy solution to connect IPv6 customers through an existing stable IPv4 MPLS infrastructure.

All clients have to do is to connect to a Provider Edge (configured with IPv6 VRFs) using IPv6.

6VPE MPLS

I hope this post will provide you with a brief and concise explanation about 6VPE.

Let’s start with a short animation resuming the 6VPE forwarding process:

Following the main configuration steps.

Lab topology

6VPE lab topology

Core IGP

For the sake of backbone stability, we need to configure the Core IGP (OSPF) to use loopback interfaces (always UP/UP) on all P and PE routers. {2.2.2.2, 3.3.3.3, 4.4.4.4}

22.2.2.2, 33.3.3.3, 44.4.4.4 loopback interfaces are used for MPLS router-id and need to be advertised through Core OSPF.

22.22.2.2, 44.4.4.4 loopback interfaces are used for MP-iBGP neighbor relationships and need to be advertised through Core OSPF.

By default OSPF will not advertise a 32-bit loopback mask. We need to configure the interface…

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