Resilient Links; Vlans - 3Com 4007 Release Note

Resilient Links

VLANs

3Com recommends that you enable the Trunk Control Message
Protocol (TCMP) on each end station of a trunk. If this protocol is not
enabled on both end stations, TCMP cannot correctly validate trunk
configuration rules. (29581)
When moving a staged module the trunking configuration is learned
from the fabric when automapping is used. (27113)
You can define resilient links only on switch fabric modules for ports
that are connected to GEN interface modules. However, if a resilient
link on a switch fabric module is connected to a GEN interface
module, and you replace that module with a Fast Ethernet Layer 2
module, the switch fabric module incorrectly maintains the resilient
link. The resilient link does not work properly in this case. (26308)
The following bridge commands may take a few minutes to complete
when several VLANs are configured in the system:
bridge vlan mode
bridge vlan define
bridge vlan remove
To minimize the delay, configure the VLANs in order of increasing
VLAN ID (VID) and remove them in order of decreasing VID.
Operating Considerations for Release 3.0.5 43