Alcatel Carrier Internetworking Solutions Omni Switch/Router - Manual (Page 475)

Configuring Spanning Tree
Page 17-27
8. The following prompt is displayed allowing you to set the Bridge Forward Delay:
New Bridge Forward Delay (4..30 secs) (current value is 4) :
Enter the Forward Delay Time as a number between 4 and 30, or press <return> to accept
the default listed in parenthesis. This time value controls how fast a port changes its
spanning state when moving toward the Forwarding state. The value determines how
long the port stays in each of the Listening and Learning states, which precede the
Forwarding state. This value is also used when a topology change has been detected and
is underway to age out all dynamic entries in the Forwarding Database. Enter a value
between 4 and 30 seconds. A value that is too small can cause temporary loops in the
network due to data being forwarded before the reconfiguration message has reached all
nodes on the network.
9. The following prompt is displayed allowing you to set the Ageing Time:
Ageing Time (10..1000000 sec) (current value is 300) :
Enter the Ageing Time as a number between 10 and 1000000, or press <return> to accept
the default listed in parenthesis. The timeout period in seconds for aging out dynamically
learned forwarding information. Enter a new Ageing Time between 10 and 1000000
seconds.
10. The following prompt is displayed allowing you to set the Auto-Tracker VLAN Ageing
Time:
Auto-Tracker VLAN Ageing Time (10..1000000 sec) (current value is 1200) :
Enter the Auto-Tracker VLAN Ageing TIme as a number between 10 and 1000000, or press
<return> to accept the default listed in parenthesis. The length of time in seconds to
remember which VLAN a port belonged to even after the port has been aged out of the
Bridge Filtering Database. The MAC and port information are preserved for the set length
of time. In the case of IPX it should be set to greater than the server Keep Alive Timer in
order to prevent the server from losing communication with the station. The default is
1200 seconds.
11. The final prompt is displayed asking you if you would like to save the new parameters:
Save the new Spanning Tree Bridge parameters ? y/n :
Enter y to save the parameters, or n to discard them. If you chose to save the parameters,
a confirmation message similar to the following is shown:
Port 5/1 set to Forwarding!
Port 5/2 set to Forwarding!
Port 5/3 set to Forwarding!
As a variation of this command you can enter the stc command without specifying a
group. This will allow you to set up spanning tree for the previously selected group. For
information on selecting a group see Selecting a Default Group on page 17-7.