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23-9
Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 23 Configuring Gigabit EtherChannel Features
Configuring MVPN Support on GEC Bundle
Configuring MVPN Support on GEC Bundle
The Multicast VPN (MVPN) feature allows a service provider to configure and support multicast traffic
within a Virtual Private Network (VPN) environment. MVPN also supports routing and forwarding of
multicast packets for each individual VPN routing and forwarding (VRF) instance, and it also provides
a mechanism to transport VPN multicast packets across the service provider backbone.
On the Cisco 10000 Series router, when we use GEC as a core facing link (from the provider edge to the
provider) the MVPN packet sent on the GEC interface has the IP header encapsulated inside a GRE
Header or the Tunnel Header. The hash function is calculated based on the tunnel header's source and
destination IP address and the original IP header's (Inner IP header) source and destination address.
Load
balancing is used on outbound GEC packets to find out the member link on which the packet is
sent.
For more information on MVPN, see the “IP Multicast VPN” section in the Multicast VPN—IP Multicast
Support for MPLS VPN guide at:
http://www.cisco.com/en/US/docs/ios/12_2sb/feature/guide/sbb_mvpn.html#wp1040907
Configuration Tasks and Examples
For configuration information and examples, see the “How to Configure Multicast VPN—IP Multicast
Support for MPLS VPNs” section in the How to Configure Multicast VPN—IP Multicast Support for
MPLS VPNs at:
http://www.cisco.com/en/US/docs/ios/12_2sb/feature/guide/sbb_mvpn.html#wp1041284
Configuring PPPoX Support on a GEC Bundle
PPPoE, PPPoEoQinQ, PPPoEoVLAN sessions are supported only in 1:N GEC mode and are provisioned
on the GEC bundle interface. The complete session traffic is directed towards the active member link.
Hence, when the active link goes down, the session traffic is directed towards the passive member link,
which then becomes the active link.
PPPoX sessions on GEC work similar to that of a normal Gigabit Ethernet interface and QoS policy
inheritance is similar to that of a normal Gigabit Ethernet interface.
Restrictions for Configuring PPPoX Support for GEC Bundle
• Support for PPPoX sessions is allowed only in a 1:N mode, where there is only one active GEC link.
• At any point of time the bandwidth of the 1:N GEC bundle will be 1 Gbps.
Note Multiple passive links can be added, but only one active link is supported for PPPoE.
For more information on PPPoEoQinQ support for subinterfaces, see PPPoE - QinQ Support feature
guide at:
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t7/feature/guide/gt_qinq.html