Troubleshooting guide

1-3
Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Configuring AppNav
Information About AppNav
• In-path—The ANC is physically placed between one or more network elements, enabling traffic to
traverse a bridge group configured on the device in inline mode.
• Off-path—The ANC works with the network infrastructure to intercept traffic through the Web
Cache Communication Protocol (WCCP).
The ANC provides the same features in both in-path and off-path deployments. In either case, only
ANCs participate in interception from the switch or router. The ANCs then distribute flows to WNs using
a consistent and predictable algorithm that considers configured policies and WN utilization.
In Figure 1-2, WAAS Nodes could be attached to either or both switches in the diagrams.
Figure 1-2 Deployment Models
AppNav Controller Interface Modules
A WAAS appliance operating as an ANC requires a Cisco AppNav Controller Interface Module, which
is similar to a standard WAVE appliance interface module but contains additional hardware, including a
network processor and high speed ternary content addressable memory (TCAM), to provide intelligent
and accelerated flow handling. The following AppNav Controller Interface Modules are supported:
• 1-GB copper 12-port AppNav Controller Interface Module
• 1-GB SFP 12-port AppNav Controller Interface Module
• 10-GB SFP+ 4-port AppNav Controller Interface Module
AppNav Controller Interface Module interfaces are configured differently to support either in-path or
off-path models of deployment:
• In-path—The ANC operates in inline interception mode with at least one inline bridge group
configured on the AppNav Controller Interface Module. A bridge group consists of two or more
physical or logical (port channel) interfaces.
• Off-path—The ANC operates in WCCP interception mode with one physical or logical (standby or
port channel) interface configured with an IP address.