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Cisco ME 3800X and ME 3600X Switch Command Reference
OL-28238-01
Chapter 2 Cisco ME 3800X and ME 3600X Switch Cisco IOS Commands
channel-group
Defaults
No channel groups are assigned.
No mode is configured.
Command Modes
Interface configuration
Command History
Usage Guidelines
For Layer 2 EtherChannels, you do not have to create a port-channel interface first by using the
interface
port-channel
global configuration command before assigning a physical port to a channel group.
Instead, you can use the
channel-group
interface configuration command. It automatically creates the
port-channel interface when the channel group gets its first physical port if the logical interface is not
already created. If you create the port-channel interface first, the
channel-group-number
can be the same
as the
port
-
channel-number,
or you can use a new number. If you use a new number, the
channel-group
command dynamically creates a new port channel.
If the port is a UNI or an ENI, you must use the
no shutdown
interface configuration command to enable
it before using the
channel-group
command. UNIs and ENIs are disabled by default. NNIs are enabled
by default.
You do not have to disable the IP address that is assigned to a physical port that is part of a channel group,
but we strongly recommend that you do so.
You create Layer 3 port channels by using the
interface port-channel
command followed by the
no
switchport
interface configuration command. You should manually configure the port-channel logical
interface before putting the interface into the channel group.
After you configure an EtherChannel, configuration changes that you make on the port-channel interface
apply to all the physical ports assigned to the port-channel interface. Configuration changes applied to
the physical port affect only the port where you apply the configuration. To change the parameters of all
ports in an EtherChannel, apply configuration commands to the port-channel interface, for example,
spanning-tree commands or commands to configure a Layer 2 EtherChannel as a trunk.
If you do not specify
non-silent
with the
auto
or
desirable
mode, silent is assumed. The silent mode is
used when the switch is connected to a device that is not PAgP-capable and seldom, if ever, sends
packets. A example of a silent partner is a file server or a packet analyzer that is not generating traffic.
In this case, running PAgP on a physical port prevents that port from ever becoming operational.
However, it allows PAgP to operate, to attach the port to a channel group, and to use the port for
transmission. Both ends of the link cannot be set to silent.
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.
Caution
You should exercise care when setting the mode to
on
(manual configuration). All ports configured in
the
on
mode are bundled in the same group and are forced to have similar characteristics. If the group is
misconfigured, packet loss or spanning-tree loops might occur.
Do not configure an EtherChannel in both the PAgP and LACP modes. EtherChannel groups running
PAgP and LACP can coexist on the same switch. Individual EtherChannel groups can run either PAgP
or LACP, but they cannot interoperate.
Release
Modification
12.2(52)EY
This command was introduced.
Summary of Contents for ME 3600X
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