July 3, 2002
Cisco Aironet 1200 Series access points may hang or reboot when they receive a burst of packets over the Ethernet port. A power cycle might be needed to bring the units back up.
This issue can occur when any extended burst of traffic (39 frames or more in less than one microsecond) is received by the Ethernet port on the Cisco Aironet 1200 Series Access Point (AP). One example of such a burst is seen when over 30 Cisco Aironet APs are located on the same multicast domain. The APs will create the burst when one AP requests an update and all the other APs respond. This issue may also be seen on any very busy network.
The following messages may appear:
machine check Exception next instruction address: 0x000359bc Machine Status Register: 0x00029200 Condition Register: 0x48000042 Bus Error Adress Register: 0x02000004 Bus Error Syndrome Register: 0x0c000000 Task: 0xe3bb00 "tNetTask"
*** Restarting System in 5 seconds... machine check Exception next instruction address: 0x001f2fe0 Machine Status Register: 0x00029200 Condition Register: 0x22242048 Bus Error Adress Register: 0x0163ca18 Bus Error Syndrome Register: 0x0c000000 Task: 0xbd6858 "tDhcpcTask" 2002/06/06 10:44:28 (Warning): Routine "SysIntegrityTaskBody" is attempting to recover the forwardTbl Guard semaphore
Upgrade instructions are detailed in the release notes for this firmware version, which are also located on the same download page.
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AIR-AP1200 hangs under bursts of ethernet traffic
For More Information
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