Cisco Cisco Web Security Appliance S360 Guía Para Resolver Problemas
How do routers elect "Designated Web−cache" in
WCCP environment?
WCCP environment?
Document ID: 118241
Contributed by Kei Ozaki and Siddharth Rajpathak, Cisco TAC
Engineers.
Engineers.
Aug 12, 2014
Contents
Question:
Question:
How do routers elect "Designated Web−cache" in WCCP environment?
Environment: Cisco Web Security Appliance (WSA) used with WCCP redirection
Election of the designated web−cache will take place once a Service Group membership has established,
during initial handshake or following a change. The designated web−cache must be receiving a
WCCP2_I_SEE_YOU message from every router in the Service Group.
during initial handshake or following a change. The designated web−cache must be receiving a
WCCP2_I_SEE_YOU message from every router in the Service Group.
Election of the designated web−cache is not part of the WCCP protocol.
Below IETF draft describes version 2.0 of the Web Cache Communication Protocol (WCCP)
https://tools.ietf.org/id/draft−wilson−wrec−wccp−v2−01.txt
Typically it is recommended that the web−cache with the lowest IP address be selected as designated
web−cache for a Service Group.
web−cache for a Service Group.
While using WSA with WCCP redirection on Cisco routers, WSA with the lowest IP address will be elected
as Designated Web Cache (DWC).
as Designated Web Cache (DWC).
Updated: Aug 12, 2014
Document ID: 118241