Default Etherchannel Configuration; Etherchannel Configuration Guidelines - Cisco ME 3400 Software Configuration Manual

Configuring EtherChannels

Default EtherChannel Configuration

Table 34-3
Table 34-3
Feature
Channel groups
Port-channel logical interface
PAgP mode
PAgP learn method
PAgP priority
LACP mode
LACP learn method
LACP port priority
LACP system priority
LACP system ID
Load balancing

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:
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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
34-10
shows the default EtherChannel configuration.
Default EtherChannel Configuration
Do not try to configure more than 48 EtherChannels on the switch.
Configure a PAgP EtherChannel including only NNIs or only ENIs.
Configure a LACP EtherChannel including only NNIs or only ENIs.
Configure all ports in an EtherChannel to operate at the same speeds and duplex modes.
All ports in an EtherChannel must be the same type, either UNI, NNI, or ENI. You cannot mix port
types in an EtherChannel.
On UNIs, the EtherChannel mode must always be configured to on.
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. UNIs and ENIs are disabled by default. NNIs 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
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Chapter 34 Configuring EtherChannels and Link-State Tracking
Default Setting
None assigned.
None defined.
No default.
Aggregate-port learning on all NNIs and ENIs.
128 on all NNIs and ENIs.
No default.
Aggregate-port learning on all NNIs and ENIs.
32768 on all NNIs and ENIs.
32768.
LACP system priority and the switch MAC address.
Load distribution on the switch is based on the
source-MAC address of the incoming packet.
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