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Solved
Stalls from WAC730
I have three WAC730s running in ensemble mode. They are running firmware version 3.9.1.0. One of the devices was showing occasional 40-second transmit/receive stalls, while the others were fine. I did a factory reset of all devices and reconfigured, but the problem remained. I swapped two of the devices and the problem occurred again on the same device in its new location. I think I have proven the one device is bad. How do I confirm that and get it replaced under warranty?
I have moved the WAC back to its original spot and could not get any failures even after testing every second for four days. I am not sure what fixed it, but it wasn't uptime, configuration, or temperature.
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I ran ping to look for stalls while checking changes in the kernel logs using 'dmesg', and saw this message during stalls. Does this help? It is an Apple device, though I am monitoring from a non-Apple laptop.
wl0.0: wlc_ampdu_watchdog: XXXXXXX in PS mode may be stuck or receiver died wl0: wlc_ampdu_watchdog: cleaning up ini tid 0 due to no progress for 2 secs tx_in_transit 1 wlc_dump_aggfifo: framerdy 0x2 bmccmd 1 framecnt 0x1 AQM agg params 0xfc0 maxlen hi/lo 0x0 0xffff minlen 0x0 adjlen 0x0 AQM agg results 0x8001 len hi/lo: 0x0 0x606 BAbitmap(0-3) 0 0 0 0 wl0: wlc_ampdu_tx_send_delba: tid 0 initiator 1 reason 39 ba_state 3 ba_wsize 16 tx_in_transit 1 tid 0 rem_window 16 start_seq 0x32 max_seq 0x33 tx_exp_seq 0x33 bar_ackpending_seq 0x32 bar_ackpending 0 free_me 0 alive 0 retry_bar 0 retry_head 0 retry_tail 0 retry_cnt 0 ackpending: 0000: 00 00 00 00 00 00 00 00 barpending: 0000: 00 00 00 00 00 00 00 00 txretry: 0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0016: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0032: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0048: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 retry_seq: 0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0016: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0032: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0048: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0064: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0096: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0112: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
I have moved the WAC back to its original spot and could not get any failures even after testing every second for four days. I am not sure what fixed it, but it wasn't uptime, configuration, or temperature.
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