All, I have seen many customers that have at least 2 or more Root Bridges and the reason could be 1. Networks are separated by routers 2. Some parts of the networks are unstable so they set spantree portadmin to disable because of resetting switches because of power
The things that I would look for are: 1. Do you have system up time changes (due to power)(Select all switches and check the device time on Netsole console) 2. Are the Root Bridges separated by a routers Please call into the GTAC and we would be glad to help you troubleshoot the issue (or help you understand why it looks like you have separate RB's) On Tue, Jan 29, 2013 at 6:35 PM, Geoff Smith < [email protected]> wrote: > Use the MSTP Info flexview in Netsight to check that all the switches have > the same Config Digest. The Config Digest is created from The Config Name > (Case sensitive and beware of leading and trailing spaces), the Revision > number in the NST configuration and also all of the VLAN IDs that are on > each switch. Note that all switches in the MSTP group must have the same > VLANs configured on them.**** > > ** ** > > *Geoff Smith* > *Technical Administrator* > *Information, Communications & Technology* > *Toowoomba Service Centre* > *T: *07 4688 6649 > *F: *07 4631 9174 > *M: *0417 006 504 > *E: *[email protected] > *W: *http://www.toowoombaRC.qld.gov.au/ > *Toowoomba Regional Council* > *PO Box 3021, Toowoomba Village Fair QLD 4350***** > > *From:* Darrin Green [mailto:[email protected]] > *Sent:* Wednesday, 30 January 2013 9:17 AM > *To:* Enterasys Customer Mailing List > *Subject:* Re: [enterasys] Multiple Spanning Tree Issues**** > > ** ** > > You should have only one Spantree Root Bridge. It appears you need to map > out your entire Spantree topology. Also, you might want to implement a > syslog server to see messages from your switches relative to port changes > that can trigger Spantree topology changes. You can try this command > (N-Series) or an equivalent command on each switch that is participating in > Spantree:**** > > ** ** > > *show spantree priority* (to see the current priority)**** > > ** ** > > Use the output to diagram the Root MAC, Root Priority, Root Cost, Root > Port and Bridge ID Priority for each switch participating in Spantree. Once > you have done this, you can decide which switch you want to be the Spantree > Root Bridge as well as secondaries etc then change the Bridge ID priority > with this command (N-Series) or an equivalent command on each switch that > is participating in Spantree:**** > > ** ** > > *set spantree priority* (the lowest number will become the root bridge)*** > * > > ** ** > > If you have a support contract (or not) Enterasys GTAC will be more than > willing to help you properly design your Spantree network. **** > > ** ** > > On Tue, Jan 29, 2013 at 2:33 PM, William Olive < > [email protected]> wrote:**** > > Jason > Is the topology stable, or are you seeing repeated topology changes in > your statistics? > > > Billo > Data Communications Co-Ordinator > Information Technology & Telecommunications > ph 0249 213804 fax 0249 213038 > [email protected] > > > **** > > -----Original Message----- > From: Jason Grubbs [mailto:[email protected]] > Sent: Wednesday, 30 January 2013 7:31 AM > To: Enterasys Customer Mailing List > Subject: [enterasys] Multiple Spanning Tree Issues > > After attending a recent training at Enterasys, I found a problem in our > network. We currently have 23 devices, 3 of which are reporting as the > Root Bridge. > > We are running MSTP and all of the switches are in the PGSD domain. The > switch we would like to be the root bridge has a priority of 0, the reset > are set at 32768. > > How can I resolve this issue? I tried disabling spantree on the two > incorrect bridges but that did not resolve the issue. > > Jason Grubbs > Network Engineer > Pottsgrove School District > Internal Extension – 1026 > Direct Dial - 484–524-0107 > > ________________________________ > This email and any files transmitted with it are to be treated as > confidential and as such are not to be used or disclosed except for the > purpose for which it has been sent. Any views or opinions presented in this > e-mail are solely those of the author and do not represent those of the > Pottsgrove School District. The School District accepts no liability for > any damage caused by this e-mail. The recipient is required to indemnify > the School District against any claims for loss or damage caused by any > viruses or otherwise. > > ---**** > > To unsubscribe from enterasys, send email to [email protected] with the > body: unsubscribe enterasys [email protected]**** > > > --- > To unsubscribe from enterasys, send email to [email protected] with the > body: unsubscribe enterasys [email protected]**** > > > > **** > > ** ** > > -- > Darrin E. Green > Senior Technical Support Specialist > Dallas Area Rapid Transit > 1401 Pacific Avenue > Dallas, Texas 75202 > Ph 214-749-3173 > Fax 214-749-3656 > Email [email protected]**** > > - --To unsubscribe from enterasys, send email to [email protected] with > the body: unsubscribe enterasys [email protected] **** > > > *Local People, Local Service * > <http://www.toowoombaRC.qld.gov.au> > This email and any files transmitted with it are intended solely for the > use of the individual or entity to whom they are addressed. If you have > received this email in error please notify the sender and delete the > material from any computer. The Council accepts no responsibility for the > content of any email which is sent by an employee which is of a personal > nature or which represents the personal view of the sender. If you wish to > contact Council by non electronic means, Council's postal address is: > Toowoomba Regional Council. PO BOX 3021, Toowoomba Village Fair QLD 4350. > > > - --To unsubscribe from enterasys, send email to [email protected] with > the body: unsubscribe enterasys [email protected] > > -- *Jason Parker* | Engineer Support Lead Enterasys Networks | A Siemens Enterprise Communications Company 9 Northeastern Blvd. Salem, NH 03079 Office: +603-952-5637| Mobile: +603-973-6395 Email: [email protected] *"There is 'NOTHING' more important than our customers"* --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected]
