Cisco 3845 - Security Bundle Router Software Guide

28-9
Cisco ME 3800X and 3600X Switch Software Configuration Guide
OL-23400-01
Chapter 28 Configuring EtherChannels
Configuring EtherChannels
Default EtherChannel Configuration
Table 28-3 shows the default EtherChannel configuration.
EtherChannel Configuration Guidelines
If improperly configured, some EtherChannel ports are automatically disabled to avoid network loops
and other problems. Follow these guidelines to avoid configuration problems:
• Do not try to configure more than 26 EtherChannels on the switch.
• Configure all ports in an EtherChannel to operate at the same speeds and duplex modes.
• Enable all ports in an EtherChannel. A port in an EtherChannel that is disabled by using the
shutdown interface configuration command is treated as a link failure, and its traffic is transferred
to one of the remaining ports in the EtherChannel. ME 3800X and ME 3600X ports are enabled by
default.
• When a group is first created, all ports follow the parameters set for the first port to be added to the
group. If you change the configuration of one of these parameters, you must also make the changes
to all ports in the group:
– Allowed-VLAN list
– Spanning-tree path cost for each VLAN
– Spanning-tree port priority for each VLAN
– Spanning-tree Port Fast setting
• Do not configure a port to be a member of more than one EtherChannel group.
• 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.
Table 28-3 Default EtherChannel Configuration
Feature Default Setting
Channel groups None assigned.
Port-channel logical interface None defined.
PAgP mode No default.
PAgP learn method Aggregate-port learning.
PAgP priority 128.
LACP mode No default.
LACP learn method Aggregate-port learning.
LACP port priority 32768.
LACP system priority 32768.
LACP system ID LACP system priority and the switch MAC address.
Load balancing Load distribution on the switch is based on the
source-MAC address of the incoming packet.

Cisco 3845 - Security Bundle Router Specifications

General

Brand	Cisco
Model	3845 - Security Bundle Router
Category	Switch
Language	English