Dell PowerConnect 5224 User Manual - Page 33

Link Type, Point-to-Point, Shared, Edge Port, Migration - problems

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• Link Type - The link type attached to this interface. (Default: Auto) - Point-to-Point - A connection to exactly one other bridge. - Shared - A connection to two or more bridges. - Auto - The switch automatically determines if the interface is attached to a point-to-point link or to shared media. • Edge Port - You can enable this option if an interface is attached to a LAN segment that is at the end of a bridged LAN or to an end node. Because end nodes cannot cause forwarding loops, they can pass directly through to the spanning tree forwarding state. Specifying Edge Ports provides: - Quicker convergence for devices such as workstations or servers - Retains the current forwarding database to reduce the amount of frame flooding required to rebuild address tables during reconfiguration events - Does not cause the Spanning Tree to initiate reconfiguration when the interface changes state, - Overcomes other STP-related timeout problems. Edge Port should only be enabled for ports connected to an end-node device. • Migration - Re-checks the appropriate BPDU format to send on the selected interface. If, at any time, the switch detects STP BPDUs, including Configuration or Topology Change Notification BPDUs, it automatically sets the selected interface to forced STP-compatible mode. You can also check this Migration check box to manually recheck the appropriate BPDU format (RSTP or STP-compatible) to send on the selected interfaces. Addendum to the 3 248 and 52 24 User 's Guides 33

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Addendum to the 3248 and 5224 User’s Guides
33
•
Link Type
— The link type attached to this interface. (Default: Auto)
–
Point-to-Point
— A connection to exactly one other bridge.
–
Shared
— A connection to two or more bridges.
–
Auto
— The switch automatically determines if the interface is
attached to a point-to-point link or to shared media.
•
Edge Port
— You can enable this option if an interface is attached to a
LAN segment that is at the end of a bridged LAN or to an end node.
Because end nodes cannot cause forwarding loops, they can pass
directly through to the spanning tree forwarding state. Specifying Edge
Ports provides:
–
Quicker convergence for devices such as workstations or servers
–
Retains the current forwarding database to reduce the amount of
frame flooding required to rebuild address tables during
reconfiguration events
–
Does not cause the Spanning Tree to initiate reconfiguration when
the interface changes state,
–
Overcomes other STP-related timeout problems.
Edge Port should only be enabled for ports connected to an end-node
device.
•
Migration
— Re-checks the appropriate BPDU format to send on the
selected interface. If, at any time, the switch detects STP BPDUs,
including Configuration or Topology Change Notification BPDUs, it
automatically sets the selected interface to forced STP-compatible
mode. You can also check this Migration check box to manually re-
check the appropriate BPDU format (RSTP or STP-compatible) to
send on the selected interfaces.