F5 is upgrading its customer support chat feature on My.F5.com. Chat support will be unavailable from 6am-10am PST on 1/20/26. Refer to K000159584 for details.

Forum Discussion

abhy201's avatar
abhy201
Icon for Nimbostratus rankNimbostratus
Sep 24, 2018

Pool member down due to no Ping response

Hello,   Below is the Monitor log for a pool member which shows down. The pool member is another Vserver which is active and gives a successful ping when I do it directly from cmd line.   The ...
BIG-IP
cloud
devops
LTM
rluhrman_127985's avatar
rluhrman_127985
Historic F5 Account
Sep 24, 2018

The logs is misleading. Ping really means request... if you do the same for an HTTP monitor it doesn't state "Request Sent" is states (_do_ping) etc.

 

Can you do a "tmsh list ltm monitor (monitor name)" for output for the monitor that is failing?

 

Also try using either telnet or socat to connect to the IP:PORT combination instead of using ICMP, which goes as far as layer 3, while your monitor should test all the way to layer 7.

 

abhy201's avatar
abhy201
Icon for Nimbostratus rankNimbostratus
Sep 24, 2018

Thank you for checking. Below is the output for the list ltm monitor.

 

ltm monitor https monitor_name-https-monitor { adaptive disabled cert /Common/client_cert-co.crt cipherlist DEFAULT:+SHA:+3DES:+kEDH compatibility enabled defaults-from https destination : interval 5 ip-dscp 0 key /Common/client_cert-co.key recv "HTTP/1.(0|1) (200|301|302|404)" recv-disable none send "HEAD / HTTP/1.0\r\n\r\n" time-until-up 0 timeout 16 }

 

Also adding a detailed stack of the monitor log.

 

[1][23692] 2018-09-24 17:20:47.467516: ID 2278 :(inst_to_service) Logging enabled. [ addr=::ffff:IP_abcd:Port srcaddr=none ] [0][23691] 2018-09-24 17:20:47.467517: ID 2278 :(inst_to_service) Logging enabled. [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] [0][23691] 2018-09-24 17:20:49.032073: ID 2278 :(_ssl_shutdown_service): shutting down, return ssl true [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port mon=/Common/monitor_name-https-monitor fd=14 ] [0][23691] 2018-09-24 17:20:49.032242: ID 2278 :(_do_ping): time to ping, now=[1537827649.032066][2018-09-24 17:20:49], status=DOWN [ addr=::ffff:IP_abcd:Port mon=/Common/monitor_name-https-monitor fd=-1 pend=0 conn=0 up_intvl=5 dn_intvl=5 timeout=16 time_until_up=0 immed=0 next_ping=[1537827649.028548][2018-09-24 17:20:49] last_ping=[1537827644.062996][2018-09-24 17:20:44] deadline=[1537827650.078785][2018-09-24 17:20:50] on_service_list=True snd_cnt=6 rcv_cnt=0 ] [0][23691] 2018-09-24 17:20:49.032267: ID 2278 :(_send_active_service_ping): pinging [ addr=::ffff:IP_abcd:Port srcaddr=none ] [0][23691] 2018-09-24 17:20:49.032273: ID 2278 :(_connect_to_service): creating new socket (rd0) [ addr=::ffff:IP_abcd:Port ] [0][23691] 2018-09-24 17:20:49.032298: ID 2278 :(_connect_to_service): connect: Operation now in progress [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] [0][23691] 2018-09-24 17:20:49.032326: ID 2278 :(_do_ping): post ping, status=DOWN [ addr=::ffff:IP_abcd:Port mon=/Common/monitor_name-https-monitor fd=15 pend=1 conn=1 up_intvl=5 dn_intvl=5 timeout=16 time_until_up=0 immed=0 next_ping=[1537827654.028548][2018-09-24 17:20:54] last_ping=[1537827649.032066][2018-09-24 17:20:49] deadline=[1537827650.078785][2018-09-24 17:20:50] on_service_list=True snd_cnt=7 rcv_cnt=0 ] [0][23691] 2018-09-24 17:20:49.036759: ID 2278 :(_main_loop): Activity on pending service, now=[1537827649.036433][2018-09-24 17:20:49] [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port fd=15 pend=1 conn=1 ] [0][23691] 2018-09-24 17:20:49.036772: ID 2278 :(_send_active_service_ping): pinging [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] [0][23691] 2018-09-24 17:20:49.036787: ID 2278 :(_send_active_service_ping): writing [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] send=HEAD / HTTP/1.0\x0d\x0a\x0d\x0a

 

[0][23691] 2018-09-24 17:20:49.036796: ID 2278 :(do_ssl_write): incoming state: 0 [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] [0][23691] 2018-09-24 17:20:49.036817: ID 2278 :(do_ssl_write) state: INIT [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] [0][23691] 2018-09-24 17:20:49.036825: ID 2278 :(initialize_ssl) legacy: false, cipher: 'DEFAULT:+SHA:+3DES:+kEDH', compat: true [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] [0][23691] 2018-09-24 17:20:49.037040: ID 2278 :(do_ssl_write) state: CONNECTING, legacy mode: false [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] [0][23691] 2018-09-24 17:20:49.037076: ID 2278 :(do_ssl_write): state: 4 [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] [0][23691] 2018-09-24 17:20:49.040714: ID 2278 :(_main_loop): Service ready for read, now=[1537827649.040704][2018-09-24 17:20:49] [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port fd=15 pend=0 conn=0 ] [0][23691] 2018-09-24 17:20:49.040727: ID 2278 :(_recv_active_service_ping): reading [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] [0][23691] 2018-09-24 17:20:49.040734: ID 2278 :(do_ssl_read) legacy mode: false [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] [0][23691] 2018-09-24 17:20:49.040741: ID 2278 :(do_ssl_read): state: 4 [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] [0][23691] 2018-09-24 17:20:49.040748: ID 2278 :(_send_active_service_ping): pinging [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] [0][23691] 2018-09-24 17:20:49.040756: ID 2278 :(_send_active_service_ping): writing [ addr=::ffff:IP_abcd:Port srcaddr=::ffff:IP_abcd:Port ] send=HEAD / HTTP/1.0\x0d\x0a\x0d\x0a