Troubleshooting guide

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Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Configuring Traffic Interception
Configuring Advanced WCCP Features on Routers
– Each VRF instance has independent assignment, redirection, and return methods.
• In a WAAS AppNav deployment, enable WCCP only on the ANC devices that are intercepting
traffic and distributing it to the optimizing WAAS nodes (WNs). Configure WNs that are part of the
AppNav Cluster with the appnav-controller interception method.
Guidelines for File Server Access Methods
Some file servers have several network interfaces and can be reached through multiple IP addresses. For
these server types, you must add all the available IP addresses to the branch WAE’s WCCP accept list.
This situation prevents a client from bypassing the branch WAE by using an unregistered IP address. The
WAE Device Manager GUI displays all the IP addresses in the GUI.
Some file servers have several NetBIOS names and only one IP address. For these servers, if the client
connects using the IP address in the UNC path (that is, \\IP_address\share instead of \\server\share),
WAAS selects the first NetBIOS name from the server list in the WAE Device Manager GUI that matches
this IP address. WAAS uses that name to perform NetBIOS negotiations between the data center WAE
and the file server, and to create resources in the cache. If a file server uses multiple NetBIOS names to
represent virtual servers (possibly with different configurations) and has one NetBIOS name that is
identified as the primary server name, put that name in the server list before the other names.
Configuring Advanced WCCP Features on Routers
This section describes how to configure the advanced WCCP Version 2 features on a WCCP-enabled
router that is transparently redirecting requests to WAEs in your WAAS network and contains the
following topics:
• Information About Configuring a Router to Support WCCP Service Groups, page 1-6
• Configuring IP Access Lists on a Router, page 1-9
• Setting a Service Group Password on a Router, page 1-10
• Configuring a Loopback Interface on the Router, page 1-10
• Configuring Router QoS for WCCP Control Packets, page 1-11
Note Before you do the procedures in this section, you should have already configured your router for basic
WCCP as described in the Cisco Wide Area Application Services Quick Configuration Guide.
Information About Configuring a Router to Support WCCP Service Groups
WCCP Version 2 enables a set of branch WAEs in a WAE or ANC group to connect to multiple routers.
The WAEs in a group and the WCCP Version 2-enabled routers connected to the WAE group that are
running the same WCCP service are known as a service group.
Through communication with the branch WAEs, the WCCP Version 2-enabled routers are aware of the
available branch WAEs. Routers and branch WAEs become aware of one another and form a service
group using WCCP Version 2. See Figure 1-1.
In a WAAS AppNav deployment, only the ANCs are included in the service group. The routers do not
send traffic directly to the optimizing WAEs (WNs); instead, ANCs distribute traffic within the WAAS
network to the optimizing WNs.