Forum Discussion
Sahir_180434
Jun 04, 2015Nimbostratus
Least connection loadbalancing question.
Hi,
I am testing ltm 11.5.2HF1 least connection loadbalancing method, anyways in my test I disable a pool member in a pool that is consisted of 16 members and after few seconds when all other me...
- Jun 05, 2015
Hi Sahir, This is not bug or issue. Hope you are aware of SRT(Slow Ramp Time). Whenever you enable any pool member, f5 doesn't give all new connection to that member. Slowly f5 share load to new member. By the way difference session is just 3 now, its not bad.
nitass
Jun 05, 2015Employee
i have not yet had an idea how to test with http traffic (short-lived connection) but it seems okay with ssh. i am running 11.6.0 hf4.
configuration
root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm virtual bar
ltm virtual bar {
cmp-enabled no
destination 172.28.24.10:22
ip-protocol tcp
mask 255.255.255.255
pool foo
profiles {
tcp { }
}
rules {
qux
}
source 0.0.0.0/0
source-address-translation {
type automap
}
vs-index 19
}
root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm pool foo
ltm pool foo {
load-balancing-mode least-connections-member
members {
200.200.200.101:22 {
address 200.200.200.101
}
200.200.200.111:22 {
address 200.200.200.111
}
}
slow-ramp-time 0
}
root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm rule qux
ltm rule qux {
when RULE_INIT {
set static::pool_name "foo"
set static::members_cmd "members -list $static::pool_name"
set static::pool_list [eval $static::members_cmd]
unset -nocomplain static::pool_conn
foreach static::pool_mbr $static::pool_list {
set static::pool_conn([lindex $static::pool_mbr 0]) 0
}
unset static::pool_name static::members_cmd static::pool_mbr
}
when LB_SELECTED {
increase counter
set server_ip [LB::server addr]
incr static::pool_conn($server_ip)
log
set log_conn "client:[IP::client_addr]:[TCP::client_port] "
foreach elm $static::pool_list {
append log_conn "[lindex $elm 0]:$static::pool_conn([lindex $elm 0]) "
}
log local0. $log_conn
}
when CLIENT_CLOSED {
decrease counter
incr static::pool_conn($server_ip) -1
}
/var/log/ltm
[root@ve11a:Active:In Sync] config tail -f /var/log/ltm
Jun 5 13:16:02 ve11a notice mcpd[8104]: 01070639:5: Pool /Common/foo member /Common/200.200.200.111:22 session status forced disabled.
Jun 5 13:16:24 ve11a info tmm[30284]: Rule /Common/qux : client:192.168.206.117:59163 200.200.200.111:0 200.200.200.101:1
Jun 5 13:16:37 ve11a info tmm[30284]: Rule /Common/qux : client:192.168.206.117:59167 200.200.200.111:0 200.200.200.101:2
Jun 5 13:16:46 ve11a info tmm[30284]: Rule /Common/qux : client:192.168.206.117:59169 200.200.200.111:0 200.200.200.101:3
Jun 5 13:16:55 ve11a notice mcpd[8104]: 01070639:5: Pool /Common/foo member /Common/200.200.200.111:22 session status enabled.
Jun 5 13:17:02 ve11a info tmm[30284]: Rule /Common/qux : client:192.168.206.117:59174 200.200.200.111:1 200.200.200.101:3
Jun 5 13:17:10 ve11a info tmm[30284]: Rule /Common/qux : client:192.168.206.117:59177 200.200.200.111:2 200.200.200.101:3
Jun 5 13:17:17 ve11a info tmm[30284]: Rule /Common/qux : client:192.168.206.117:59179 200.200.200.111:3 200.200.200.101:3
Jun 5 13:17:24 ve11a info tmm[30284]: Rule /Common/qux : client:192.168.206.117:59182 200.200.200.111:3 200.200.200.101:4
Jun 5 13:17:31 ve11a info tmm[30284]: Rule /Common/qux : client:192.168.206.117:59185 200.200.200.111:4 200.200.200.101:4
- Sahir_180434Jun 05, 2015NimbostratusI am using Ixia server, you can create different type of tests according to your needs. Thanks
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