I currently have a building that connects to another building by 1300 bridges.They have been operational for about 2 years. Now all of the sudden the building that has the non-root bridge is experiencing poor network performance. The Non-Root Bridge Radio Interface currently shows 540154 Output Erros and 2204867 Packets Output. The Root Bridge Radio Interface currently shows 442442 Output errors and 2663530 Packets Output.
The only thing you can do now is verify the cabling isn't corroded. Verify the bridge alignment and check for interference on the channel you currently are using. Changing the channel might help if it is interference. other than that, bridge could be going bad.