Chapter 37 Configuring EtherChannels and Link-State Tracking

Configuring EtherChannels

 

Command

Purpose

Step 5

 

 

channel-groupchannel-group-number mode

Assign the port to a channel group, and specify the PAgP or the

 

{auto [non-silent] desirable [non-silent] on}

LACP mode.

 

{active passive}

For channel-group-number, the range is 1 to 48. This number

 

 

 

 

must be the same as the port-channel-number(logical port)

 

 

configured in the “Creating Port-Channel Logical Interfaces”

 

 

section on page 37-15.

 

 

For mode, select one of these keywords:

 

 

auto—Enables PAgP only if a PAgP device is detected. It

 

 

places the port into a passive negotiating state, in which the

 

 

port responds to PAgP packets it receives but does not start

 

 

PAgP packet negotiation. This keyword is not supported

 

 

when EtherChannel members are from different switches in

 

 

the switch stack.

 

 

desirable—Unconditionally enables PAgP. It places the port

 

 

into an active negotiating state, in which the port starts

 

 

negotiations with other ports by sending PAgP packets. This

 

 

keyword is not supported when EtherChannel members are

 

 

from different switches in the switch stack.

 

 

on—Forces the port to channel without PAgP or LACP. In

 

 

the on mode, an EtherChannel exists only when a port group

 

 

in the on mode is connected to another port group in the on

 

 

mode.

 

 

non-silent—(Optional) If your switch is connected to a

 

 

partner that is PAgP capable, configure the switch port for

 

 

nonsilent operation when the port is in the auto or desirable

 

 

mode. If you do not specify non-silent, silent is assumed.

 

 

The silent setting is for connections to file servers or packet

 

 

analyzers. This setting allows PAgP to operate, to attach the

 

 

port to a channel group, and to use the port for transmission.

 

 

active—Enables LACP only if a LACP device is detected. It

 

 

places the port into an active negotiating state in which the

 

 

port starts negotiations with other ports by sending LACP

 

 

packets.

 

 

passive—Enables LACP on the port and places it into a

 

 

passive negotiating state in which the port responds to LACP

 

 

packets that it receives, but does not start LACP packet

 

 

negotiation.

 

 

For information on compatible modes for the switch and its

 

 

partner, see the “PAgP Modes” section on page 37-6and the

 

 

“LACP Modes” section on page 37-7.

Step 6

 

 

end

Return to privileged EXEC mode.

Step 7

 

 

show running-config

Verify your entries.

Step 8

 

 

copy running-config startup-config

(Optional) Save your entries in the configuration file.

 

 

 

 

 

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

 

 

 

 

 

 

OL-9775-02

 

 

37-17

 

 

 

 

 

Page 849
Image 849
Cisco Systems 3750E manual For channel-group-number, the range is 1 to 48. This number, 37-17