3Com 4007, Command Reference Manual

Page: 157 / 574

bridge trunk define
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Layer 2
Switching
Modules
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Multilayer
Switching
Modules
bridge trunk define Defines one or more trunks on the module. When you define a trunk, you
specify ports and characteristics for the trunk.
Valid Minimum Abbreviation
b t def
Important Considerations
■
If you have more than one media type on your module, you are
prompted to select a media type before you are prompted for the
trunk information.
■
All links to be trunked must be homogeneous. For example, you
cannot mix Fast Ethernet and Gigabit Ethernet links in a trunk.
■
If you have already defined other trunks on your module, you cannot
select ports that are part of an existing trunk.
■
Whenever possible, create trunks before you define your virtual LANs
(VLANs). If you create a trunk whose ports are part of existing VLANs,
the VLAN bridge port configuration changes. For example, if you have
the default VLAN as well as IP VLANs and you then define a trunk with
ports in one of the IP VLANs, the module removes those ports from
that VLAN and places them in the default VLAN. You must modify the
VLAN and add the new bridge ports to the appropriate VLAN. This
situation does not apply if you have only the default VLAN (all ports
are part of the default VLAN).
■
When you define a VLAN to include trunk ports, specify the anchor
port (lowest-numbered port) that is associated with the trunk.
■
Do not use Gigabit Ethernet (GEN) Interface modules (such as the
2-port 1000BASE-SX Gigabit Ethernet (GEN) Interface Module) when
defining trunks.
■
The number of trunk groups and the number of ports within a trunk
group depend on the switch fabric module that is installed in your
system:
■
The 3CB9FG24T switch fabric module supports up to 12 trunk
groups.
■
The 3CB9FG9 switch fabric module supports up to 9 trunk groups.
■
You can define all trunks in one
bridge trunk define
operation and
then reboot. At the end of each trunk definition, the module prompts
you to define another trunk.