Channel

2/1−2,2/1−4

Broadcast suppression percentage(0−100)

Flow control

receive−(off,on),send−(off,on)

Security

yes

Membership

static,dynamic

Fast start

yes

QOS scheduling

rx−(none),tx−(none)

CoS rewrite

yes

ToS rewrite

IP−Precedence

Rewrite

yes

UDLD

yes

AuxiliaryVlan

1..1000,untagged,dot1p,none

SPAN

source,destination

Creating an EtherChannel on a Set/Clear Command−Based Switch

To create an EtherChannel bundle, you must enable EtherChannel on two or more ports. On a Set/Clear command−based switch, use the following Privileged mode command to enable EtherChannel:

set port channel <port list> mode <onoffdesirableauto>

The following output shows 2 as the module number and 1 through 4 as the port numbers:

catalyst5000> (enable) set port channel 2/1−4 ?

<admin_group>

Admin group

mode

Channel mode

catalyst5000> (enable) set port channel 2/1−4 mode ?

auto

Channel

auto mode

desirable

Channel desirable mode

off

Turn

off

Channelling

on

Turn

on Channelling

<cr>

 

 

 

catalyst5000> (enable) set port channel 2/1−4 mode auto Port(s) 2/1−4 channel mode set to auto. catalyst5000> (enable)

Table 10.8 explains the syntaxes available for the mode option. The mode on each port can be set to on, off, auto, or desirable.

Table 10.8: The four mode options for configuring an EtherChannel bundle on a switch.

EtherChannel Mode Option

Description

on

Enables the port to channel or bundle without any negotiation.

off

Disables the port from channeling or creating a bundle.

auto

Enables a port to negotiate the state in which the port will respond to PAgP

 

packets it receives. The syntax does not, however, initiate PagP packet

 

negotiation. This is the default setting.

desirable

Enables a port to actively negotiate creating a bundle with the port on the

 

opposite side of the link by continuously sending PAgP packets.

Note

Using the auto and desirable modes allows the configured ports to automatically negotiate

 

whether to form a channel. The channel ports can be in different modes, as long as the modes

 

are compatible. For example, if a port is in desirable mode, the port can form a bundle with

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Cisco Systems RJ-45-to-AUX manual Disables the port from channeling or creating a bundle, 220