Edge-Core ECS3510-26P Management Manual page 214

| Spanning Tree Algorithm
C 8
HAPTER
Configuring Interface Settings for STA
CLI R
EFERENCES
◆ "Spanning Tree Commands" on page 795
P
ARAMETERS
These parameters are displayed:
Interface – Displays a list of ports or trunks.
◆
Admin Edge Status for all ports – Since 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, and also overcomes other STA-related timeout problems.
However, remember that Edge Port should only be enabled for ports
connected to an end-node device. (Default: Enabled)
Enabled – Manually configures a port as an Edge Port.
■
Disabled – Disables the Edge Port setting.
■
Auto – The port will be automatically configured as an edge port if
■
the edge delay time expires without receiving any RSTP or MSTP
BPDUs. Note that edge delay time (802.1D-2004 17.20.4) equals
the protocol migration time if a port's link type is point-to-point
(which is 3 seconds as defined in IEEE 802.3D-2004 17.20.4);
otherwise it equals the spanning tree's maximum age for
configuration messages (see maximum age under
Global Settings for STA" on page
An interface cannot function as an edge port under the following
conditions:
If spanning tree mode is set to STP
■
cannot automatically transition to operational edge-port state using
the automatic setting.
If loopback detection is enabled
■
detected, the interface cannot function as an edge port until the
loopback state is released.
If an interface is in forwarding state and its role changes, the
■
interface cannot continue to function as an edge port even if the
edge delay time has expired.
If the port does not receive any BPDUs after the edge delay timer
■
expires, its role changes to designated port and it immediately
enters forwarding state (see
on page 217).
Spanning Tree – Enables/disables STA on this interface.
◆
(Default: Enabled)
– 214 –
"Configuring
207).
(page 207), edge-port mode
(page 206) and a loopback BPDU is
"Displaying Interface Settings for STA"