Automatic Backplane Trunking; Important Considerations - 3Com 4007 Implementation Manual

230 C 12: T
HAPTER RUNKING
Automatic
Backplane Trunking
Important
Considerations
Provides automatic backplane trunking on both the switch fabric module
and the managed interface modules (such as the 4-port GBIC GEN
Interface Module). You can enable or disable this feature at the switch
fabric module for any or all of the interface modules.
The 24-port Gigabit Switch Fabric Module (Model Number 3CB9FG24T)
utilizes the chassis backplane traces on a slot-by-slot basis. Trunking is
performed through the switch fabric module backplane and not through
the interface modules.
Automatic backplane trunking is provided only through the switch
fabric module.
If automatic backplane trunking is enabled, then you cannot configure
backplane port trunking on the switch fabric module or interface
modules. If you enable a slot, that slot automatically trunks any
backplane ports.
If automatic backplane trunking is disabled, then you can configure
backplane trunking on the switch fabric module and have those
trunks automatically configured at the managed interface module.
This centralizes the trunking application through the switch fabric
module.
Staging is not supported if autoMap is enabled on the module.
The autoMap feature does not support single-port trunk groups. No
backplane trunks containing fewer than two ports can be defined on
the switch fabric module. However, on the interface module, a single
port trunk is allowed only when the switch fabric module has a trunk
already defined.