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Chapter 4
Configuring Multiprotocol Label Switching
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•
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Note
See the Configuring a Basic MPLS VPN document for setting up an IPv4 MPLS core network at:
Tip
http://www.cisco.com/en/US/tech/tk436/tk428/technologies_configuration_example09186a00800a6c1
1.shtml
Configuration Example for Implementing IPv6 VPN over MPLS
Figure 4-2
Figure 4-2
sa12-72x
CE1
CE2
sa12-72a
ASN = 200
OL-2226-23
Diff-Serv on Ingress PE
The 6VPE feature supports the same QoS mechanisms for IPv6 VPNs that is currently supported for
IPv4 VPNs on the Ingress PE.
Diff-Serv on Egress PE
The 6VPE feature supports the same QoS mechanisms for IPv6 VPNs that is currently supported for
IPv4 VPNs on the Egress PE.
FRF.12
The 6VPE feature supports FRF.12 fragmentation and interleaving for IPv6 traffic, in addition to
IPv4 traffic, on PE to CE Frame Relay connections.
For configuration tasks, see the FRF.12 Fragmentation section in the Fragmenting and Interleaving
Real-Time and Nonreal-Time Packets chapter of the Cisco 10000 Series Router Quality of Service
Configuration Guide at:
http://www.cisco.com/en/US/docs/routers/10000/10008/configuration/guides/qos/10qlfi.html#wp1
043021
When an IPv6 packet arrives on an input interface configured for IPv6, either the packet has a
Differentiated Services Code Point (DSCP) value set or an IPv6 QoS setup is done on the router
to mark the DSCP value. This packet sent over a MPLS output interface receives the DSCP value
that is mapped to the MPLS Experimental (EXP) bits. The mapping propagates the IPv6 QoS
value to its MPLS equivalent.
illustrates the
Example
IPv6 VPN over MPLS
Static routes
sa12-72b
VRF = red
6VPE1
Eth 0/0 (8008::72B/64
VRF = blue
Eth 2/0 (8008::72B/64
eBGP
4-4, which follows the figure.
MP-iBGP session
over v4-peering
ISIS+LDP
ISIS+LDP
200.11.11.1
200.10.10.1
P
ASN = 100
Cisco 10000 Series Router Software Configuration Guide
IPv6 VPN over MPLS
sa12-72e
Static routes
sa12-72d
VRF = red
6VPE2
Eth 1/0 (9009::72d/64
VRF = blue
Eth 2/0 (9009::72d/64
Static routes
sa12-72f
CE3
CE4
4-13
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