Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Attention: The Community will be in read-only mode on 12/14/2017 from 12:00 am pacific to 11:30 am.

During this time you will only be able to see content. Other interactions such as posting, replying to questions, or marking content as helpful will be disabled for few hours.

We apologize for the inconvenience while we perform important updates to the Community.

Unable to add another spanning-tree VLAN instance !!!

Hi Netpros,

I am just trying to add several VLANs to run spanning-tree. Spanning-tree instances have being limited by the command no spanning-tree ... as below. I am unable to modify this command in order to allow VLANS 5,50 and 150 as spanning-instances .. any help is much appreciated.

no spanning-tree vlan 2-10,12-19,21-100,102-4094

spanning-tree vlan 1,5,11,20,50,101,150 priority 24576

IOS version;

Cisco IOS Software, C3560 Software (C3560-IPBASE-M), Version 12.2(25)SEB2, RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2005 by Cisco Systems, Inc.

Compiled Tue 07-Jun-05 23:34 by yenanh

ROM: Bootstrap program is C3560 boot loader

BOOTLDR: C3560 Boot Loader (C3560-HBOOT-M) Version 12.2(25r)SEA, RELEASE SOFTWARE (fc)

SW_3560_LVL1_01 uptime is 3 weeks, 21 hours, 29 minutes

System returned to ROM by power-on

System restarted at 17:50:15 AEDT Sun Feb 17 2008

System image file is "flash:c3560-ipbase-mz.122-25.SEB2/c3560-ipbase-mz.122-25.SEB2.bin"

3 REPLIES
New Member

Re: Unable to add another spanning-tree VLAN instance !!!

You don't require to negate spanning-tree commands for existing vlans. You can execute a command

spanning-tree vlan priority <>

to configure any additional vlan for spanning-tree.

New vlans will be added in the list of configured spanning-tree priority.

Re: Unable to add another spanning-tree VLAN instance !!!

HI

If u see u r config

no spanning-tree vlan 2-10,12-19,21-100,102-4094 it is covering all the vlan for which u r trying to enable spanning-tree.I think first remove this vlans from this range and enable spanning-tree on this vlans.

Thanks

Mahmood

Re: Unable to add another spanning-tree VLAN instance !!!

Thanks ...

These are the original commands as shown on the config:

no spanning-tree vlan 2-10,12-19,21-100,102-4094

spanning-tree vlan 1,11,20,101 priority 24576

I am trying to add VLAN 5, 50 and 150

1.- If I type in spanning-tree vlan 1,5,11,20,50,101,150 priority 24576. The command takes it however there is no changes to the command "no spanning-tree vlan 2-10,12-19,21-100,102-4094".

2.- I then try and type "no spanning-tree vlan 2-4,6-10,12-19,21-49,51-100,102-144,151-4094" The command is taken however it does not change the output which stills shows "no spanning-tree vlan 2-10,12-19,21-100,102-4094" and so I am still unable to create the STP instances for VLAN 5,50 and 150.

So the command I posted originally are the ones AFTER trying already to add VLAN 5,50,and 150

445
Views
0
Helpful
3
Replies
CreatePlease to create content