Modifying Trunks; Important Considerations - 3Com corebuilder 3500 Implementation Manual

152 C 8: T
HAPTER RUNKING

Modifying Trunks

Important
Considerations
You can modify a trunk in two ways:
You can modify a trunk's characteristics (for example, the operating
mode or the TCMP state).
You can add or remove a port from the trunk.
You must keep at least one port that you defined in the original trunk.
To completely redefine a trunk configuration, remove the trunk and
define a new one.
You cannot modify, add, or remove ports that are part of different
trunks from the one you that you are modifying.
To avoid configuration errors, do not modify FDDI station mode
port-pairs when any of the ports in the pair are members of a trunk.
If you have more than one media type on your system (for example,
Fast Ethernet and Gigabit Ethernet), you are prompted for a media
type before you are prompted for the trunk information.
Any changes that you make to the trunk's characteristics take effect
immediately and do not interrupt trunk operations. If you add or
remove a port, however, you must reboot the system to implement
the change.
In an FDDI trunk:
You cannot modify FDDI station mode port pairs when any of the
ports in the pair are in a trunk.
When you modify the station mode, any FDDI ports that are
associated with VLANs or a trunk are removed from the VLAN or
trunk.
If you change an FDDI port pair from SAS to DAS, select the pair using
only the lower of the two port numbers, as you do with a trunk
anchor port.