Cisco Nexus 7000 Series - Page 101

Send document comments to nexus7k-docfeedback@cisco.com.
5-3
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
Chapter 5 Configuring WCCPv2
Information About WCCPv2
Figure 5-1 WCCPv2 Cache Cluster and Service Group
You can configure a service group as open or closed. An open service group forwards traffic without
redirection if there is no cache engine to redirect the traffic to. A closed service group drops traffic if
there is no cache engine to redirect the traffic to.
The service group defines the traffic that will be redirected to individual cache engines in that service
group. The service group definition consists of the following:
• Service ID (0–255)
• Service Type
• Priority of the service group
• Protocol (TCP or UDP) of redirected traffic
• Service flags
• Up to eight TCP or UDP port numbers (either all source or all destination port numbers)
Service Group Lists
WCCPv2 requires that each cache engine be aware of all the routers in the service group. You can
configure a list of router addresses for each of the routers in the group on each cache engine.
The following sequence of events details how WCCPv2 configuration works:
Step 1 You configure each cache engine with a list of routers.
Step 2 Each cache engine announces its presence and a list of all routers with which it has established
communications.
193814v
Clients
Clients
Clients
Clients
Clients
Clients
Service group
Cache 1
Cache 2
Cache 3
Internet