ACE Sticky Connections, Show Conn Output and Show serverfarm
Hi Community,
I'm deploying a Cisco ACE module and I have some questions about sticky connections and about the output of the show conn command and show serverfarm command.
I have the follwoing configuration:
rserver host srv_1 ip address 10.4.11.14 inservicerserver host srv_2 ip address 10.4.11.18 inserviceserverfarm host farm_144 rserver srv_1 144 weight 1 inservice rserver srv_2 144 weight 3 inservice
sticky ip-netmask 255.255.255.255 address source st_host144
timeout 10080
serverfarm farm_144
class-map match-all vip_144
2 match virtual-address 10.4.11.208 tcp eq 143
policy-map type loadbalance first-match lb_144
class class-default
policy-map multi-match policy_vip_webcache
class vip_webcache_144
loadbalance vip inservice
loadbalance policy lb_144
loadbalance vip icmp-reply active
nat dynamic 411 vlan 411
We can assume that service policy was applied at the interface vlan. So, let's go to the questions:
1- If sticky is enabled the output command "show conn" should show just one entry by ip address?
The real output is:
DC01-ACE-01-PRIMARY-SW1/context_servidores# show conn | inc :143333046 1 in TCP 411 10.2.158.87:3616 10.4.11.208:143 ESTAB 286390 3 in TCP 411 10.2.158.87:3562 10.4.11.208:143 ESTAB310233 1 in TCP 411 10.1.5.87:3424 10.4.11.208:143 ESTAB
Look that the ip address 10.2.158.87 is shown 2 times. In same times, the same ip address is shown 4 times to the same VIP and the same port. Is it a normal behavior?
2- According to the configuration, the srv_2 has weight 3 and srv_1 has weigth 1, but the output of show serverfarm show somethin strange:
DC01-ACE-01-PRIMARY-SW1/context_servidores# show serverfarm farm_144 serverfarm : farm_144, type: HOST total rservers : 2 state : ACTIVE DWS state : DISABLED --------------------------------- ----------connections----------- real weight state current total failures ---+---------------------+------+------------+----------+----------+--------- rserver: srv_1 10.4.11.14:144 1 OPERATIONAL 11 386 0 rserver: srv_2 10.4.11.18:144 3 OPERATIONAL 35 66 0
We can see that the weight is working good, but the total of connections is higher at srv_1 than srv_2. Why?
Somebody can help me to understand better this problem of if its a normal behavior?
Thanks in advance!!
Hi Gaurav,
About question 1, I got some informations too. It's perfectly normal the client open 2 or more connections at the same time. The client's application is the responsable. We removed the ACE and put the client directly to the server and the result of the total connections opened was the same.
About question 2, I made some "clears" on the serverfarm, the sticky database and after that, the numbers were more real.
DC01-ACE-02-SECONDARY-SW1/context_servidores# sh serverfarm farm_webcache_144
serverfarm : farm_webcache_144, type: HOST
total rservers : 2
state : ACTIVE
DWS state : DISABLED
----------connections-----------
real weight state current total failures
---+---------------------+------+------------+----------+----------+---------
rserver: srv_webcache_1
10.4.11.14:144 1 OPERATIONAL 1025 15499 4436
rserver: srv_webcache_2
10.4.11.18:144 2 OPERATIONAL 1794 33471 471
DC01-ACE-02-SECONDARY-SW1/context_servidores#
Anyway thank you very much for your feedback.
Plínio Monteiro
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