WCCP web-cache VS service numbers

[Martin Smid]

Hello,

I am working on WCCP configuration for our LAN and I have been wondering if there is any difference in functionality between using "ip wccp web-cache" or "ip wccp [service number]"?

(The plan is to have caching appliances and by using WCCP, the web traffic would be picked up and sent to the caching engines.)

Thank you for your time.

[rlima · Accepted solution]

Hi Martin,

The WCCP service numbers are different from the TCP port numbers,  in the case of the wccp web-cache , this is going to redirect all the traffic from TCP port 80 from routers to Cisco Cache/ACNS devices.  Other third-part WCCP clients will use custom wccp number (90 - 97) ,  some of the most commons wccp service groups are showed below,  :

Service   Name	Service Number	Protocol	Port	Priority
web-cache	0	tcp	80	240
dns	53	udp	53	202
ftp-native	60	tcp		200
tcp-promiscuous	61	tcp	*	34
tcp-promiscuous	62	tcp	*	34
https-cache	70	tcp	443	231
rtsp	80	tcp	554	200
wmt	81	tcp	1755	201
mmsu	82	udp	1755	201
rtspu	83	udp	5005	201
cifs-cache	89	tcp	139, 445	224
custom	90			220
custom	91			221
custom	92			222
custom	93			223
custom	94			224
custom	95			225
custom	96			226
custom	97			227
custom-web-cache	98	tcp	80	230
reverse-proxy	99	tcp	80	235

Regards

Rubens

[Martin Smid]

Hello Rubens,

thanks for the spot on information. I was trying to find a website with the full spectrum of the service groups and couldn't find any. Can you provide a link for anything like that? Also regarding the priority I assume the lower number means higher priority? (based on that WAAS uses 61 and 62)

Thank you

[rlima]

Hi Martin,

You might want to check the WCCP RFC to get more info,  the Cisco documentation will have the same list as the one I sent you,  as these are the wccp service-group range that Cisco wccp clients are using.  As for the WCCP priority, each WCCP service group will have its own priority,  higher priority means the packet once hit the interface with wccp enabled  will be first matched to that particular wccp service.

Thank you

Rubens