3Com 4007 Release Note - page 43
Operating Considerations for Release 3.0.5
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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)
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When moving a staged module the trunking configuration is learned
from the fabric when automapping is used. (27113)
Resilient Links
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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)
VLANs
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The following bridge commands may take a few minutes to complete
when several VLANs are configured in the system:
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bridge vlan mode
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bridge vlan define
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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.