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23-3
Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 23 Configuring Gigabit EtherChannel Features
Prerequisites for Gigabit EtherChannel Configuration
Prerequisites for Gigabit EtherChannel Configuration
The following are the prerequisites for configuring GEC bundles:
• Create a GEC bundle interface before adding GE links to the GEC bundle using the channel-group
command.
• Add GE links to the GEC bundle and configure all the links identically.
Restrictions for Gigabit EtherChannel Configuration
The following are general restrictions applicable to GEC bundles:
• Bidirectional Forwarding Detection Protocol (BFD) is not supported on GEC bundles.
• A dot1Q/QinQ subinterface created on a GEC bundle requires one VCCI on all the member links.
The GEC bundle also uses one VCCI.
• Intelligent Service Gateway (ISG) IP sessions are not supported on GEC bundles.
• Gigabit EtherChannels are not supported on a 10 GE shared port adaptor (SPA).
• On core facing deployments, queuing actions are only supported when they are applied on each
individual member link.
• In 1:N deployment mode:
–
Combination of any SPA based Gigabit Ethernet ports with either a full height GE line card or
half height GE line card is not supported.
–
A maximum of 4 Gigabit Ethernet SPAs form a GEC bundle. Each SPA interface must have the
same bay number and port number, assuming the representation is
GigabitEthernetSlotNumber/BayNumber/Port-Number.
For example, in the case of SPAs, Gi1/2/1 can be bundled with Gi5/2/1, but Gi1/2/1 cannot be
bundled with Gi1/0/1.
–
Member link counters are not updated.
• We do not recommend the deletion of the GEC bundle main interface before removing the member
links, using the no channel-group command. Similarly, before you delete the GEC bundle main
interface, remove the subinterfaces.
Configuring QoS Service Policies on GEC Interfaces
The QoS support feature on Gigabit EtherChannel allows service policies to be applied on GEC traffic.
Support for QoS can be applied differently to GEC bundles or main interfaces of member links and GEC
bundle subinterfaces.
• Input QoS can directly be applied on GEC bundle subinterfaces or main interfaces. Input QoS can
be applied on member links using the vlan-group QoS feature. For details, see the
“Configuration
Example for Using the VLAN Group Feature to Apply QoS on Member Links” section on page 23-5
and the “Configuration Example for Applying QoS on GEC Bundle Subinterfaces” section on
page 23-6.