- Community Home
- >
- Networking
- >
- Legacy
- >
- Switches, Hubs, Modems
- >
- Re: Many RSTP root changes
Switches, Hubs, and Modems
1752380
Members
5664
Online
108788
Solutions
Forums
Categories
Company
Local Language
юдл
back
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Forums
Discussions
юдл
back
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Blogs
Information
Community
Resources
Community Language
Language
Forums
Blogs
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-21-2009 02:37 AM
тАО01-21-2009 02:37 AM
Many RSTP root changes
on several ( but not all my switches ) I see some many RSTP spanning tree root changes
I 01/21/09 10:15:00 stp: RSTP Root changed from 32768:000cdb-48f500 to
32768:000cdb-4d7e00
I 01/21/09 10:15:01 stp: RSTP Root changed from 32768:000cdb-4d7e00 to
32768:000cdb-48f500
Here is a diagram that shows the network topology
HP 9308-1 <--> HP 9308-2
|
|
|
|
|
HP 2650-1 <--> HP 2650-2
There was a second link from 9308-2 to 2650-2, but we removed it to simplify whilst we are investigating some spanning tree problems.
Spanning tree is enabled on the 9308's and on the 2650's
Why do I see all these log entries on only some of the 2600's.
The configurations are similar across our company, on all the switches, but not all show the RSTP changes.
I 01/21/09 10:15:00 stp: RSTP Root changed from 32768:000cdb-48f500 to
32768:000cdb-4d7e00
I 01/21/09 10:15:01 stp: RSTP Root changed from 32768:000cdb-4d7e00 to
32768:000cdb-48f500
Here is a diagram that shows the network topology
HP 9308-1 <--> HP 9308-2
|
|
|
|
|
HP 2650-1 <--> HP 2650-2
There was a second link from 9308-2 to 2650-2, but we removed it to simplify whilst we are investigating some spanning tree problems.
Spanning tree is enabled on the 9308's and on the 2650's
Why do I see all these log entries on only some of the 2600's.
The configurations are similar across our company, on all the switches, but not all show the RSTP changes.
3 REPLIES 3
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-21-2009 08:41 AM
тАО01-21-2009 08:41 AM
Re: Many RSTP root changes
A few things we've learnt recently about spanning tree and HP kit:
Despite a switch claiming to be running RSTP it might be running STP until a reboot. This is seen by ports entering listerning, learning states rather than transitioning to forwarding immediately. This causes problems because by default a port in basic STP will cause a topology change. In RSTP a port is an edge port by default and won't cause a topology change.
Try (switch firmware supporting) the following:
show spanning-tree debug-counters ports [ethernet] instance 0
Look for Topology Change Rx with a last updated time which matches the last spanning tree reconvergence. Use this command to narrow down where the change originated from.
Despite a switch claiming to be running RSTP it might be running STP until a reboot. This is seen by ports entering listerning, learning states rather than transitioning to forwarding immediately. This causes problems because by default a port in basic STP will cause a topology change. In RSTP a port is an edge port by default and won't cause a topology change.
Try (switch firmware supporting) the following:
show spanning-tree debug-counters ports [ethernet] instance 0
Look for Topology Change Rx with a last updated time which matches the last spanning tree reconvergence. Use this command to narrow down where the change originated from.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-21-2009 08:42 AM
тАО01-21-2009 08:42 AM
Re: Many RSTP root changes
Sorry, also we've noticed that some of our switches are not seeing topology changes despite running RSTP, having been rebooted and no bpdu-filters being present. We believe there's some bugs in certain firmware which cause this behaviour.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-23-2009 02:44 AM
тАО01-23-2009 02:44 AM
Re: Many RSTP root changes
simply a bad connection can trigger a topology change.
a link with a lot of data traffic also.
Instead of letting the switches decide wich is the root using all standard rules, designate one switches as the spanning-tree root and another as secondary root using the spannning-tree priority.
This will lower the number of topology changes drastically.
a link with a lot of data traffic also.
Instead of letting the switches decide wich is the root using all standard rules, designate one switches as the spanning-tree root and another as secondary root using the spannning-tree priority.
This will lower the number of topology changes drastically.
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
News and Events
Support
© Copyright 2024 Hewlett Packard Enterprise Development LP