Cisco Systems 7600 manual Configuring the EtherChannel Min-Links Feature, 12-12

Page 12

Chapter 12 Configuring EtherChannels

Configuring EtherChannels

Configuring the EtherChannel Min-Links Feature

Note Release 12.2(18)SXF and later releases support the EtherChannel Min-Links feature.

The EtherChannel Min-Links feature is supported on LACP EtherChannels. This feature allows you to configure the minimum number of member ports that must be in the link-up state and bundled in the EtherChannel for the port channel interface to transition to the link-up state. You can use the EtherChannel Min-Links feature to prevent low-bandwidth LACP EtherChannels from becoming active. This feature also causes LACP EtherChannels to become inactive if they have too few active member ports to supply your required minimum bandwidth.

To configure the EtherChannel Min-Links feature, perform this task:

 

Command

Purpose

Step 1

 

 

Router(config)# interface port-channel group_number

Selects an LACP port channel interface.

Step 2

 

 

Router(config-if)#port-channel min-links number

Configures the minimum number of member ports that

 

 

must be in the link-up state and bundled in the

 

 

EtherChannel for the port channel interface to

 

 

transition to the link-up state.

 

Router(config-if)#no port-channel min-links

Reverts to the default number of active member ports

 

 

(one).

Step 3

 

 

Router(config-if)# end

Exits configuration mode.

Step 4

 

 

Router# show running-config interface type1

Verifies the configuration.

 

slot/port

 

 

Router# show interfaces type1 slot/port etherchannel

 

 

 

 

Note Although the EtherChannel Min-Links feature works correctly when configured only on one end of an EtherChannel, for best results, configure the same number of minimum links on both ends of the EtherChannel.

This example shows how to configure port channel interface 1 to be inactive if fewer than 2 member ports are active in the EtherChannel:

Router# configure terminal

Router(config)# interface port-channel 1

Router(config-if)#port-channel min-links 2

Router(config-if)# end

Tip For additional information (including configuration examples and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/hw/routers/ps368/tsd_products_support_series_home.html

 

Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX

12-12

OL-4266-08

Image 12
Contents Configuring EtherChannels 12-1EtherChannel Feature Overview Understanding How EtherChannels Are ConfiguredEtherChannel Configuration Overview 12-2Understanding Manual EtherChannel Configuration Understanding PAgP EtherChannel Configuration12-3 Understanding Ieee 802.3ad Lacp EtherChannel Configuration 12-4Understanding Port Channel Interfaces Understanding Load Balancing12-5 12-6 Routerconfig# interface port-channel Routerconfig# no interface port-channelRouter# show running-config interface 12-7Configuring Channel Groups Router# show running-config interface port-channel12-8 Routerconfig-if# no lacp port-priority Router# show running-config interface typeRouter# show running-config interface fastethernet 5/6 12-9Configuring the Lacp System Priority and System ID 12-10Configuring EtherChannel Load Balancing Configures EtherChannel load balancingReverts to default EtherChannel load balancing 12-11Configuring the EtherChannel Min-Links Feature Routerconfig-if# port-channel min-links numberRouterconfig-if# no port-channel min-links 12-12
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