performance of css for web servers

Unanswered Question
Feb 21st, 2007

I have a customer complaining of slow response time BECAUSE of the content switch, which is load balancing web servers. Any idea of how to speed that up? Below is the config, Id be glad for any help.

!*************************** GLOBAL ***************************

ip route 0.0.0.0 0.0.0.0 XXXXXXXXXXXX 1

!************************** CIRCUIT **************************

circuit VLAN1

ip address XXXXXXXXXXXXX XXXXXXXXXXXXX

!************************** SERVICE **************************

service server1443

ip address XXXXXX

protocol tcp

port 443

keepalive port 443

keepalive frequency 2

keepalive type ssl

active

service server180

ip address XXXXXXXXXX

protocol tcp

keepalive port 80

port 80

keepalive type http

keepalive frequency 2

active

service server18080

ip address XXXXXXXXXXXXXXXX

protocol tcp

keepalive port 8080

port 8080

keepalive type http

keepalive frequency 2

active

service server2442

ip address XXXXXXXXXXXXXXXX

protocol tcp

port 443

keepalive port 443

keepalive frequency 2

keepalive type ssl

active

service server280

ip address XXXXXXXXXXXXXXX

protocol tcp

keepalive port 80

port 80

keepalive type http

keepalive frequency 2

active

service server28080

ip address XXXXXXXXXXXXXXX

protocol tcp

keepalive port 8080

port 8080

keepalive type http

keepalive frequency 2

active

!*************************** OWNER ***************************

owner Owner2

content i80

add service server180

add service sewrver280

protocol tcp

port 80

vip address XXXXXXXXXXXXX

advanced-balance sticky-srcip

active

owner Owner3

content i80

add service server180

add service sewrver280

balance aca

port 443

protocol tcp

vip address XXXXXXXXXXXXXXXXXX

flow-timeout-multiplier 5400

active

owner Owner4

content i8080

add service server180

add service sewrver280

protocol tcp

port 8080

vip address XXXXXXXXXXXXXXXXXXX

advanced-balance sticky-srcip

balance aca

active

CSS11503#

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 4 (2 ratings)
Loading.
michael.e.reid Thu, 02/22/2007 - 01:22

I'd be very surprised if the content switch was slowing down access the webservers based on the config you have shown, I would look for other potential network issues - duplex settings maybe on the CSS ?

There is an issue with the CSS when uploading through the CSS it has a 10-12K window size (although this has been increased to about 40K in Version 8 of the WebNS software)

jjoseph01 Thu, 02/22/2007 - 05:15

thanks for the response. How would I go about checking the window size out, and if needed, how would I go about increasing that to version 8? Im not real familiar with it. Any help would be appreciated.

michael.e.reid Thu, 02/22/2007 - 05:56

Well, this problem causes slow upload behaviour through the CSS, so firstly, is this the problem your customers face ? If not then you have another issues.

If you have access to CCO you can download the images from cisco.com software centre. The upgrade procedure is in the release notes.

In my company I can download images from Cisco but not sure how you get your images for routers/switches/ other devices.

cheers,

Mike

jjoseph01 Thu, 02/22/2007 - 06:48

Customer complains of slow ftp speed to their webservers. This does sound like what you mention to me. Ill take a look at that first, thanks. Would this be the same as an image upgrade?

Gilles Dufour Thu, 02/22/2007 - 06:25

I would first capture sniffer traces of a client accessing the webserver directly and then the same client accessing the same page through the CSS.

Compare the 2 traces and how long it takes to get the response.

Sometimes people *feel* that it is slower.

But data proves it's not.

Gilles.

jjoseph01 Thu, 02/22/2007 - 06:51

show ver below:

CSS11503# show ver

Version: sg0810106 (08.10.1.06)

Flash (Locked): 08.10.1.06

Flash (Operational): 08.10.1.06

Type: PRIMARY

Licensed Cmd Set(s): Standard Feature Set

jjoseph01 Thu, 02/22/2007 - 07:31

Is there a way to set the interface to full duplex on the content switch?

Gilles Dufour Thu, 02/22/2007 - 08:22

by default the CSS is in auto mode, so it should negotiate with the switch full duplex.

Do a 'sho phy' to verify your current settings.

If you're not in full-duplex, you can force it with the command

interface 3/1

phy 100Mbits-FD

Gilles.

jjoseph01 Thu, 02/22/2007 - 08:47

Yeah, just did the "phy" command. Very different that what I have seen on a router or switch. Thanks, that did fix the issue.

Actions

This Discussion