SNAT, VS and multiple Idle Timeout setting

this is icmp test. i think it may be better test than tcp because it is not connection oriented.

 configuration - fastl4 idle timeout is indefinite, snat ip timeout is 30s

root@(ve11b)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm virtual bar
ltm virtual bar {
    cmp-enabled no
    destination 0.0.0.0:0
    ip-forward
    ip-protocol icmp
    mask any
    profiles {
        fastl4_indef { }
    }
    source 0.0.0.0/0
    source-address-translation {
        pool norf
        type snat
    }
    translate-address disabled
    translate-port disabled
    vs-index 8
}
root@(ve11b)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm profile fastl4 fastl4_indef
ltm profile fastl4 fastl4_indef {
    app-service none
    idle-timeout indefinite
}
root@(ve11b)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm snat-translation 200.200.200.*
ltm snat-translation 200.200.200.55 {
    address 200.200.200.55
    inherited-traffic-group true
    ip-idle-timeout 30
    traffic-group traffic-group-1
}
ltm snat-translation 200.200.200.66 {
    address 200.200.200.66
    inherited-traffic-group true
    ip-idle-timeout 30
    traffic-group traffic-group-1
}
ltm snat-translation 200.200.200.77 {
    address 200.200.200.77
    inherited-traffic-group true
    ip-idle-timeout 30
    traffic-group traffic-group-1
}

 replay icmp echo request twice

[root@centos1 ~] hping -0 -H 1 -E /var/tmp/ping.bin -d 64 200.200.200.101
HPING 200.200.200.101 (eth0 200.200.200.101): raw IP mode set, 20 headers + 64 data bytes
[main] memlockall(): Success
Warning: can't disable memory paging!

--- 200.200.200.101 hping statistic ---
2 packets tramitted, 0 packets received, 100% packet loss
round-trip min/avg/max = 0.0/0.0/0.0 ms
[root@centos1 ~]
[root@centos1 ~]
[root@centos1 ~] hping -0 -H 1 -E /var/tmp/ping.bin -d 64 200.200.200.101
HPING 200.200.200.101 (eth0 200.200.200.101): raw IP mode set, 20 headers + 64 data bytes
[main] memlockall(): Success
Warning: can't disable memory paging!

--- 200.200.200.101 hping statistic ---
2 packets tramitted, 0 packets received, 100% packet loss
round-trip min/avg/max = 0.0/0.0/0.0 ms

 connection table - entry is deleted after 30s, new connection uses new snat ip

root@(ve11b)(cfg-sync In Sync)(Active)(/Common)(tmos) show sys connection protocol icmp all-properties
Sys::Connections
172.28.24.1:58991 - 200.200.200.101:8 - 200.200.200.55:13600 - 200.200.200.101:8
--------------------------------------------------------------------------------
  TMM           0
  Type          any
  Acceleration  none
  Protocol      icmp
  Idle Time     22
  Idle Timeout  30
  Unit ID       1
  Lasthop       /Common/external 00:50:56:b3:59:8d
  Virtual Path  200.200.200.101:8
  Conn Id 0

                      ClientSide            ServerSide
  Client Addr  172.28.24.1:58991  200.200.200.55:13600
  Server Addr  200.200.200.101:8     200.200.200.101:8
  Bits In                   1.3K                  1.3K
  Bits Out                  1.3K                  1.3K
  Packets In                   2                     2
  Packets Out                  2                     2

Total records returned: 1
root@(ve11b)(cfg-sync In Sync)(Active)(/Common)(tmos)
root@(ve11b)(cfg-sync In Sync)(Active)(/Common)(tmos)
root@(ve11b)(cfg-sync In Sync)(Active)(/Common)(tmos) show sys connection protocol icmp all-properties
Sys::Connections
Total records returned: 0
root@(ve11b)(cfg-sync In Sync)(Active)(/Common)(tmos)
root@(ve11b)(cfg-sync In Sync)(Active)(/Common)(tmos)
root@(ve11b)(cfg-sync In Sync)(Active)(/Common)(tmos) show sys connection protocol icmp all-properties
Sys::Connections
172.28.24.1:58991 - 200.200.200.101:8 - 200.200.200.66:11072 - 200.200.200.101:8
--------------------------------------------------------------------------------
  TMM           0
  Type          any
  Acceleration  none
  Protocol      icmp
  Idle Time     1
  Idle Timeout  30
  Unit ID       1
  Lasthop       /Common/external 00:50:56:b3:59:8d
  Virtual Path  200.200.200.101:8
  Conn Id 0

                      ClientSide            ServerSide
  Client Addr  172.28.24.1:58991  200.200.200.66:11072
  Server Addr  200.200.200.101:8     200.200.200.101:8
  Bits In                   1.3K                  1.3K
  Bits Out                  1.3K                  1.3K
  Packets In                   2                     2
  Packets Out                  2                     2

Total records returned: 1