Will modification of configuration via the GUI Configuration Utility break existing connections?

I have read that load sys conf on command line will break existing connections.

 

it seems okay here (i.e. not breaking). i am running 11.5.1.

 

Will the same thing occur if the conf is modified, or simply just reloaded, via the GUI Configuration Utility?

 

i tested deleting configuration via tmsh. the existing connection still survives.

 

is there reload configuration option in gui?

 

this is deleting configuration test.

 config

root@(ve11a)(cfg-sync Changes Pending)(Active)(/Common)(tmos) list ltm virtual bar
ltm virtual bar {
    destination 172.28.24.10:23
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        tcp { }
    }
    source 0.0.0.0/0
    source-address-translation {
        type automap
    }
    vs-index 50
}
root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm pool foo
ltm pool foo {
    members {
        200.200.200.101:23 {
            address 200.200.200.101
        }
    }
}

 test

[root@ve11a:Active:In Sync] config  date; tmsh show sys connection cs-server-port 23
Sun Jul  6 17:11:05 PDT 2014
Sys::Connections
172.18.204.230:49184  172.28.24.10:23  200.200.200.14:49184  200.200.200.101:23  tcp  30  (tmm: 1)  none
Total records returned: 1

[root@ve11a:Active:In Sync] config  date; tmsh delete ltm virtual bar
Sun Jul  6 17:11:47 PDT 2014

[root@ve11a:Active:In Sync] config  date; tmsh show sys connection cs-server-port 23
Sun Jul  6 17:11:52 PDT 2014
Sys::Connections
172.18.204.230:49184  172.28.24.10:23  200.200.200.14:49184  200.200.200.101:23  tcp  2  (tmm: 1)  none
Total records returned: 1

[root@ve11a:Active:In Sync] config  tcpdump -nni 0.0 -s0 -c 10 port 23
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on 0.0, link-type EN10MB (Ethernet), capture size 65535 bytes
17:12:20.398431 IP 200.200.200.101.23 > 200.200.200.14.49184: . 242977700:242979160(1460) ack 1485839933 win 5840 in slot1/tmm1 lis=/Common/bar
17:12:20.398444 IP 200.200.200.101.23 > 200.200.200.14.49184: P 1460:2062(602) ack 1 win 5840 in slot1/tmm1 lis=/Common/bar
17:12:20.398460 IP 172.28.24.10.23 > 172.18.204.230.49184: P 3965833330:3965834790(1460) ack 56076194 win 4210 out slot1/tmm1 lis=/Common/bar
17:12:20.398467 IP 172.28.24.10.23 > 172.18.204.230.49184: P 1460:2062(602) ack 1 win 4210 out slot1/tmm1 lis=/Common/bar
17:12:20.398471 IP 200.200.200.14.49184 > 200.200.200.101.23: . ack 2062 win 48955 out slot1/tmm1 lis=/Common/bar
17:12:20.400144 IP 200.200.200.101.23 > 200.200.200.14.49184: P 2062:3040(978) ack 1 win 5840 in slot1/tmm1 lis=/Common/bar
17:12:20.400158 IP 172.28.24.10.23 > 172.18.204.230.49184: P 2062:3040(978) ack 1 win 4210 out slot1/tmm1 lis=/Common/bar
17:12:20.400161 IP 200.200.200.14.49184 > 200.200.200.101.23: . ack 3040 win 49933 out slot1/tmm1 lis=/Common/bar
17:12:20.411946 IP 172.18.204.230.49184 > 172.28.24.10.23: . ack 1460 win 64437 in slot1/tmm1 lis=/Common/bar
17:12:20.411956 IP 172.18.204.230.49184 > 172.28.24.10.23: . ack 3040 win 64437 in slot1/tmm1 lis=/Common/bar

this is reloading configuration test.

 config

root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm virtual bar
ltm virtual bar {
    destination 172.28.24.10:23
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        tcp { }
    }
    source 0.0.0.0/0
    source-address-translation {
        type automap
    }
    vs-index 51
}
root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm pool foo
ltm pool foo {
    members {
        200.200.200.101:23 {
            address 200.200.200.101
        }
    }
}

 test

[root@ve11a:Active:In Sync] config  date; tmsh show sys connection cs-server-port 23
Sun Jul  6 17:16:39 PDT 2014
Sys::Connections
172.18.204.230:49483  172.28.24.10:23  200.200.200.14:49483  200.200.200.101:23  tcp  3  (tmm: 0)  none
Total records returned: 1

[root@ve11a:Active:In Sync] config  date; tmsh load sys config
Sun Jul  6 17:16:53 PDT 2014
Loading system configuration...
  /defaults/asm_base.conf
  /defaults/config_base.conf
  /defaults/low_profile_base.conf
  /defaults/low_security_base.conf
  /defaults/policy_base.conf
  /defaults/wam_base.conf
  /defaults/analytics_base.conf
  /defaults/apm_saml_base.conf
  /defaults/app_template_base.conf
  /defaults/classification_base.conf
  /defaults/daemon.conf
  /defaults/fullarmor_gpo_base.conf
  /defaults/profile_base.conf
  /defaults/sandbox_base.conf
  /defaults/security_base.conf
  /defaults/urldb_base.conf
  /usr/share/monitors/base_monitors.conf
Loading configuration...
  /config/bigip_base.conf
  /config/bigip_user.conf
  /config/bigip.conf
[root@ve11a:Active:Not All Devices Synced] config 
[root@ve11a:Active:Not All Devices Synced] config 
[root@ve11a:Active:Not All Devices Synced] config 
[root@ve11a:Active:Not All Devices Synced] config 
[root@ve11a:Active:In Sync] config 
[root@ve11a:Active:In Sync] config 
[root@ve11a:Active:In Sync] config  date; tmsh show sys connection cs-server-port 23
Sun Jul  6 17:17:23 PDT 2014
Sys::Connections
172.18.204.230:49483  172.28.24.10:23  200.200.200.14:49483  200.200.200.101:23  tcp  2  (tmm: 0)  none
Total records returned: 1

[root@ve11a:Active:In Sync] config  tcpdump -nni 0.0 -s0 -c 10 port 23
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on 0.0, link-type EN10MB (Ethernet), capture size 65535 bytes
17:17:50.572919 IP 200.200.200.101.23 > 200.200.200.14.49483: . 444961626:444963086(1460) ack 3101732148 win 5840 in slot1/tmm0 lis=/Common/bar
17:17:50.572945 IP 172.28.24.10.23 > 172.18.204.230.49483: P 202469901:202471361(1460) ack 2808965259 win 4210 out slot1/tmm0 lis=/Common/bar
17:17:50.574194 IP 200.200.200.101.23 > 200.200.200.14.49483: . 1460:2920(1460) ack 1 win 5840 in slot1/tmm0 lis=/Common/bar
17:17:50.574201 IP 200.200.200.101.23 > 200.200.200.14.49483: P 2920:3034(114) ack 1 win 5840 in slot1/tmm0 lis=/Common/bar
17:17:50.574212 IP 172.28.24.10.23 > 172.18.204.230.49483: P 1460:2920(1460) ack 1 win 4210 out slot1/tmm0 lis=/Common/bar
17:17:50.574217 IP 200.200.200.14.49483 > 200.200.200.101.23: . ack 2920 win 65535 out slot1/tmm0 lis=/Common/bar
17:17:50.574221 IP 172.28.24.10.23 > 172.18.204.230.49483: P 2920:3034(114) ack 1 win 4210 out slot1/tmm0 lis=/Common/bar
17:17:50.574223 IP 200.200.200.14.49483 > 200.200.200.101.23: . ack 3034 win 65535 out slot1/tmm0 lis=/Common/bar
17:17:50.586177 IP 172.18.204.230.49483 > 172.28.24.10.23: . ack 1460 win 64437 in slot1/tmm0 lis=/Common/bar
17:17:50.588276 IP 172.18.204.230.49483 > 172.28.24.10.23: . ack 2920 win 64437 in slot1/tmm0 lis=/Common/bar