IBM BladeCenter - Disabled State

Disabled state
A port in the disabled state does not participate in frame forwarding or STP. A port
in the disabled state is virtually non-operational.
A disabled port does the following:
v Discards packets received from the network segment to which it is attached.
v Discards packets sent from another port on the switch for forwarding.
v Does not add addresses to its forwarding database.
v Receives BPDUs, but does not direct them to the system CPU.
v Does not receive BPDUs for transmission from the system CPU.
v Receives and responds to network management messages.
The following illustration shows the actions that occur when a port is in the disabled
state.
CPU
Port 2
Port 2
Port 1Port 1
Forwarding
Database
Forwarding
Database
BPDUs
BPDUs
Addresses
Forwarding
Data
Packets
Data
Packets
Network
Management
Packets
Network
Management
Packets
Network SegmentNetwork Segment
Network SegmentNetwork Segment
Switch
Fabric
Switch
Fabric
Learning
Discard
Data
Packets
Data
Packets
132 IBM BladeCenter 4-Port Gb Ethernet Switch Module: Installation and User’s Guide