Default Etherchannel Configuration - Cisco Catalyst 3550 series Software Configuration Manual

Configuring EtherChannels

Default EtherChannel Configuration

Table 30-2
Table 30-2 Default EtherChannel Configuration
Feature
Channel groups
Layer 3 port-channel logical interface
PAgP mode
PAgP learn method
PAgP priority
LACP learn method
LACP priority
Load balancing
EtherChannel Configuration Guidelines
If improperly configured, some EtherChannel interfaces are automatically disabled to avoid network
loops and other problems. Follow these guidelines to avoid configuration problems:
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Catalyst 3550 Multilayer Switch Software Configuration Guide
30-8
shows the default EtherChannel configuration.
Configure an EtherChannel with up to eight Ethernet interfaces of the same type.
Do not configure a GigaStack GBIC port as part of an EtherChannel.
Note
Configure all interfaces in an EtherChannel to operate at the same speeds and duplex modes.
Enable all interfaces in an EtherChannel. An interface 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 interfaces in the EtherChannel.
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
An EtherChannel interface that is configured as a Switched Port Analyzer (SPAN) destination port
does not join the group until it is deconfigured as a SPAN destination port.
Do not configure a secure port as part of an EtherChannel.
Chapter 30
Default Setting
None assigned.
None defined.
No default.
Aggregate-port learning on all interfaces.
128 on all interfaces.
Aggregate-port learning on all interfaces.
32768 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.
Configuring EtherChannels
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