BIG-IP HA Timers?

Could someone please define HA timers value? For eg. Persistence connection transfer timer from one peer to another one. And so on.

i do not think it is configurable. if i am not wrong, i understand data is synchronized to standby unit immediately.

Does it mean it is realtime?

Does it mean it is realtime?

yes, that is what i understand. if you have a pair, you may run tcpdump on standby unit and could see packet there.

Perfect! That could be the best possible scenario to test this.

Thanks for your help! Cheers!

My understanding was that there session table is what that is updated between the HA paired devices. The packet capture would not work as the floating IP would be hosted by the active device. Please correct me if that is wrong.

e.g.

 configuration

root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm virtual bar
ltm virtual bar {
    destination 172.28.20.111:80
    ip-protocol tcp
    mask 255.255.255.255
    mirror enabled
    pool foo
    profiles {
        http { }
        tcp { }
    }
    source 0.0.0.0/0
    source-address-translation {
        type automap
    }
    vs-index 23
}
root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm pool foo
ltm pool foo {
    members {
        200.200.200.101:80 {
            address 200.200.200.101
        }
    }
}

 traffic-group

root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) show cm traffic-group

---------------------------------------------------------
CM::Traffic-Group
Name                      Device          Status   Next
                                                   Active
---------------------------------------------------------
traffic-group-1           ve11a.acme.com  active   false
traffic-group-1           ve11b.acme.com  standby  false
traffic-group-1           ve11c.acme.com  standby  true
traffic-group-local-only  -               -        -

 active

[root@ve11a:Active:In Sync] config  tcpdump -nni 0.0 port 80
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on 0.0, link-type EN10MB (Ethernet), capture size 96 bytes
23:03:55.826879 IP 172.28.20.17.34059 > 172.28.20.111.80: S 62319:62319(0) win 5840 
23:03:55.827020 IP 172.28.20.111.80 > 172.28.20.17.34059: S 3947983183:3947983183(0) ack 62320 win 4380 
23:03:55.828778 IP 172.28.20.17.34059 > 172.28.20.111.80: . ack 1 win 5840
23:03:55.828790 IP 172.28.20.17.34059 > 172.28.20.111.80: P 1:157(156) ack 1 win 5840
23:03:55.828886 IP 200.200.200.14.34059 > 200.200.200.101.80: S 4138377900:4138377900(0) win 4380 
23:03:55.828901 IP 172.28.20.111.80 > 172.28.20.17.34059: . ack 157 win 4536
23:03:55.830747 IP 200.200.200.101.80 > 200.200.200.14.34059: S 3675627561:3675627561(0) ack 4138377901 win 5840 
23:03:55.830793 IP 200.200.200.14.34059 > 200.200.200.101.80: . ack 1 win 4380
23:03:55.830806 IP 200.200.200.14.34059 > 200.200.200.101.80: P 1:157(156) ack 1 win 4380
23:03:55.833637 IP 200.200.200.101.80 > 200.200.200.14.34059: . ack 157 win 6432
23:03:55.834892 IP 200.200.200.101.80 > 200.200.200.14.34059: P 1:244(243) ack 157 win 6432
23:03:55.834948 IP 172.28.20.111.80 > 172.28.20.17.34059: P 1:244(243) ack 157 win 4536
23:03:55.834953 IP 200.200.200.14.34059 > 200.200.200.101.80: . ack 244 win 4623
23:03:55.836948 IP 172.28.20.17.34059 > 172.28.20.111.80: . ack 244 win 6432
23:03:55.836964 IP 172.28.20.17.34059 > 172.28.20.111.80: F 157:157(0) ack 244 win 6432
23:03:55.837011 IP 172.28.20.111.80 > 172.28.20.17.34059: . ack 158 win 4536
23:03:55.837018 IP 200.200.200.14.34059 > 200.200.200.101.80: F 157:157(0) ack 244 win 4623
23:03:55.838686 IP 200.200.200.101.80 > 200.200.200.14.34059: F 244:244(0) ack 158 win 6432
23:03:55.838732 IP 200.200.200.14.34059 > 200.200.200.101.80: . ack 245 win 4623
23:03:55.838740 IP 172.28.20.111.80 > 172.28.20.17.34059: F 244:244(0) ack 158 win 4536
23:03:55.840642 IP 172.28.20.17.34059 > 172.28.20.111.80: . ack 245 win 6432

 standby

[root@ve11c:Standby:In Sync] config  tcpdump -nni 0.0 port 80
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on 0.0, link-type EN10MB (Ethernet), capture size 96 bytes
23:03:55.828927 IP 172.28.20.17.34059 > 172.28.20.111.80: S 62319:62319(0) win 5840 
23:03:55.830911 IP 172.28.20.17.34059 > 172.28.20.111.80: . ack 3947983184 win 5840
23:03:55.830940 IP 172.28.20.17.34059 > 172.28.20.111.80: P 0:156(156) ack 1 win 5840
23:03:55.832920 IP 200.200.200.101.80 > 200.200.200.14.34059: S 3675627561:3675627561(0) ack 4138377901 win 5840 
23:03:55.834772 IP 200.200.200.101.80 > 200.200.200.14.34059: . ack 157 win 6432
23:03:55.836860 IP 200.200.200.101.80 > 200.200.200.14.34059: P 1:244(243) ack 157 win 6432
23:03:55.838676 IP 172.28.20.17.34059 > 172.28.20.111.80: . ack 244 win 6432
23:03:55.838698 IP 172.28.20.17.34059 > 172.28.20.111.80: F 156:156(0) ack 244 win 6432
23:03:55.840649 IP 200.200.200.101.80 > 200.200.200.14.34059: F 244:244(0) ack 158 win 6432
23:03:55.842863 IP 172.28.20.17.34059 > 172.28.20.111.80: . ack 245 win 6432