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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 37 IPv6 over MPLS: 6PE and 6VPE
Supported Features
In the MPLS-VPN model a VPN is defined as a collection of sites sharing a common routing table. A
customer site is connected to the service provider network by one or more interfaces, where the service
provider associates each interface with a VPN routing table–known as the VRF table.
Figure 37-2 illustrates an MPLS VPN network.
Figure 37-2 MPLS VPN Network
For more conceptual information on 6PE and 6VPE, see the IPv6 VPN over MPLS guide in the MPLS:
Layer 3 VPNs Configuration Guide.
Supported Features
The following 6PE and 6VPE features are supported on the Cisco ASR 901 router effective with
Cisco IOS Release 15.2(2) SNI:
• IPv6 VRF support – Enabled for supporting 6VPE
• MPLS VPN 6VPE and 6PE – Provides IPV6 reachability for IPv6 edge routers across an MPLS
network backbone running an IPv4 control plane, without making changes to the software on the
MPLS P routers.
• 6VPE and 6PE with QoS – Supports QoS provisioning in 6PE and 6VPE networks by using existing
QoS infrastructure and configuration.
• MPLS VPN - VRF command for IPv4 and IPv6 VPN – Supports commands that allows users to
enable IPv4 and IPv6 in the same VRF.
Note All the above features are built upon existing IPv4, IPv6, MPLS and BGP infrastructure in the IOS and
Cisco ASR 901 data plane support.
VPN Client
209.165.201.10
Internet
Src: 209.165.201.10
10.3.3.10
203.0.113.1:6070
10.3.3.10
10.1.1.6
www.example.com
Inside
209.165.201.10
1. HTTP request to www.example.com
4. HTTP request to
www.example.com
C. HTTP request to www.example.com
2. ASA decrypts packet; src address is
now local address
Src: 203.0.113.1:6070
ASA Outside IP: 203.0.113.1
10.1.1.6
203.0.113.1:6075
Src: 10.1.1.6
A. HTTP to
www.example.com
B. ASA performs interface PAT for
outgoing traffic.
Src: 203.0.113.1:6075
3. ASA performs interface PAT for outgoing traffic.
Intra-interface config req’d.
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