VPN down time :0 "show log system" would show mesh uplink being used.
# show log system
Jan 1 00:01:05 KERNEL(ap-2@(none)): alg: hash: digest failed on test 1 for mv-hmac-sha1: ret=117
Jan 1 00:01:08 nanny[1305]: <303022> <WARN> |AP ap-2: | Reboot Reason: No reboot message found.
Jan 1 00:01:30 cli[1358]: <341207> <WARN> |AP ap-2: | AP support up to 6 SSID.
Jan 1 00:01:30 cli[1358]: <341172> <WARN> |AP ap-2: | Find enet0 name eth0.
Jan 1 00:01:30 cli[1358]: <341004> <WARN> |AP ap-2: | cli_choose_eth_uplink:eth current uplink set to DHCP
Jan 1 00:01:30 cli[1358]: <341169> <WARN> |AP ap-2: | Add uplink Wifi-mesh 0.
Jan 1 00:01:30 cli[1358]: <341167> <WARN> |AP ap-2: | Uplink Wifi-mesh type Wifi-mesh, state INIT->LOAD.
Jan 1 00:01:30 cli[1358]: <341169> <WARN> |AP ap-2: | Add uplink Ethernet 0.
Jan 1 00:01:30 cli[1358]: <341169> <WARN> |AP ap-2: | Add uplink Wifi-sta 6.
Jan 1 00:01:30 cli[1358]: <341169> <WARN> |AP ap-2: | Add uplink 3G/4G 7.
Jan 1 00:01:30 cli[1358]: <341194> <WARN> |AP ap-2: | Loading configuration, func main, line 571.
Jan 1 00:01:30 cli[1358]: <341032> <WARN> |AP ap-2: | Read configuration successfully, retry 0, image size 2544.
Jan 1 00:01:30 cli[1358]: <341005> <ERRS> |AP ap-2: | terminal access is enabled but dropbear is not running, starting
Jan 1 00:01:31 cli[1358]: <341263> <WARN> |AP ap-2: | enable uplink Wifi-mesh.
Jan 1 00:01:31 cli[1358]: <341167> <WARN> |AP ap-2: | Uplink Wifi-mesh type Wifi-mesh, state LOAD->PROBE.
Jan 1 00:01:32 cli[1358]: <341172> <WARN> |AP ap-2: | Find enet0 name eth0.
Jan 1 00:01:32 cli[1358]: <341213> <ERRS> |AP ap-2: | cli_papi_dp_msg_handler: ASAP to CLI socket recv failed 10 100.
Jan 1 00:01:32 cli[1358]: <341004> <WARN> |AP ap-2: | receive sapd hello for process recovery
Jan 1 00:01:33 cli[1358]: <341174> <WARN> |AP ap-2: | No current uplink, pick the highest one - Wifi-mesh Wifi-mesh.
Jan 1 00:01:41 nanny[1305]: <303073> <ERRS> |AP ap-2: | Process /aruba/bin/radiusd-term [pid 1438] died: got signal SIGTERM
Jan 1 00:01:41 nanny[1305]: <303079> <ERRS> |AP ap-2: | Restarted process /aruba/bin/radiusd-term, new pid 1640
Jan 1 00:01:41 cli[1358]: <399833> <ERRS> |AP ap-2: | Error, forwarding traps to the controller.
Jan 1 00:01:44 cli[1358]: <341213> <ERRS> |AP ap-2: | cli_papi_dp_msg_handler: ASAP to CLI socket recv failed 10 100.
Jan 1 00:01:45 cli[1358]: <341135> <WARN> |AP ap-2: | Master Changed - new 10.93.50.209 old 0.0.0.0 current swarm state 0.
Jan 1 00:01:46 cli[1358]: <399833> <ERRS> |AP ap-2: | Error, forwarding traps to the controller.
Jan 1 00:01:46 cli[1358]: <341135> <WARN> |AP ap-2: | Master Changed - new 10.93.50.209 old 0.0.0.0 current swarm state 1.
Jan 1 00:01:47 cli[1358]: <341004> <WARN> |AP ap-2@10.93.50.205 cli| Recv mesh linkup from sapd
Jan 1 00:01:47 cli[1358]: <341166> <WARN> |AP ap-2@10.93.50.205 cli| Get interface br0 ip: 10.93.50.205/255.255.255.0.
Jan 1 00:01:47 cli[1358]: <341167> <WARN> |AP ap-2@10.93.50.205 cli| Uplink Wifi-mesh type Wifi-mesh, state PROBE->UP.
Jan 1 00:01:47 cli[1358]: <341135> <WARN> |AP ap-2@10.93.50.205 cli| Master Changed - new 10.93.50.209 old 0.0.0.0 current swarm state 1.
Jan 1 00:01:47 cli[1358]: <341004> <WARN> |AP ap-2@10.93.50.205 cli| Swarm State Change from Found to Image_ok
Sep 9 14:43:29 cli[1358]: <341207> <WARN> |AP ap-2@10.93.50.205 cli| AP support up to 6 SSID.
Sep 9 14:43:29 cli[1358]: <341172> <WARN> |AP ap-2@10.93.50.205 cli| Find enet0 name eth0.
Sep 9 14:43:29 cli[1358]: <341194> <WARN> |AP ap-2@10.93.50.205 cli| Loading configuration, func cli_config_init_and_apply_new_config, line 3046.
Sep 9 14:43:30 cli[1358]: <341032> <WARN> |AP ap-2@10.93.50.205 cli| Read configuration successfully, retry 0, image size 2524.