Configuring Etherchannel; Default Etherchannel Configuration - Cisco WS-C3550-12G Software Configuration Manual

Chapter 21

Configuring EtherChannel

Configuring EtherChannel
This section describes these configurations for EtherChannel on Layer 2 and Layer 3 interfaces:
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Note Make sure that the interfaces are correctly configured (see the
Guidelines" section on page
Note After you configure an EtherChannel, configuration changes applied to the port-channel interface
apply to all the physical interfaces assigned to the port-channel interface, and configuration changes
applied to the physical interface affect only the interface where you apply the configuration.

Default EtherChannel Configuration

Table 21-2
Table 21-2 Default EtherChannel Configuration
Feature
Channel groups
Layer 3 port-channel logical interface
PAgP mode
PAgP learn method
PAgP priority
Load balancing
78-11194-03
Default EtherChannel Configuration, page 21-7
EtherChannel Configuration Guidelines, page 21-8
Configuring Layer 2 EtherChannels, page 21-9
Configuring Layer 3 EtherChannels, page 21-11
Configuring EtherChannel Load Balancing, page 21-13
Configuring the PAgP Learn Method and Priority, page 21-14
21-8).
shows the default EtherChannel configuration.
"EtherChannel Configuration
Default Setting
None assigned.
None defined.
Auto and silent (The interface is in a passive negotiating
state; it responds to PAgP packets it receives but does not
start PAgP packet negotiation. PAgP is enabled only if a
PAgP device is detected.)
Aggregate-port learning on all interfaces.
128 on all interfaces.
Load distribution on the switch is based on the
source-MAC address of the incoming packet. Load
distribution based on the source and destination IP
address is also enabled for routed IP traffic.
Catalyst 3550 Multilayer Switch Software Configuration Guide
Configuring EtherChannel
21-7