Cisco Wide Area Application Services Monitoring Guide (Software Version 4.2)

Monitoring Traffic Interception

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This chapter describes how to use traffic interception to monitor your WAAS devices and contains the following sections:

•Verifying WCCPv2 Interception

•Verifying Inline Interception

Verifying WCCPv2 Interception

This section describes several IOS and WAAS WCCP commands that are available to verify if WCCP interception is working correctly.

This section contains the following topics:

•show ip wccp IOS Command Output

•show wccp WAAS Command Outputs

show ip wccp IOS Command Output

The show ip wccp IOS command output provides WCCP inventory including number of routers, WAEs or service group, packets redirected, and forwarding and return method. This is the most commonly used CLI command to verify if WCCP interception is working correctly.

The command syntax is as follows:

show ip wccp [service_group#] [detail]

The following examples show how to use the command both with and without the optional argument and keyword.

Figure 2-1 highlights the area of the show ip wccp IOS command output that show that there is one intercepting router and one WAE registered to Service Group 61.

Figure 2-1 Command Output Sample 1: show ip wccp

Figure 2-2 highlights the area of the show ip wccp IOS command output that shows that the Total Packets s/w Redirect counter is incrementing on software-based platforms (for example, Cisco ISR).

Figure 2-2 Command Output Sample 2: show ip wccp

Figure 2-3 highlights the area of the show ip wccp IOS command output that shows that the Total Packets s/w Redirect counter is not incrementing on hardware-based platforms (for example, Cisco Catalyst 6500).

Figure 2-3 Command Output Sample 3: show ip wccp

The show ip wccp service_group# detail IOS command output provides information about state, redirection and return methods used, connect time, and so forth. Figure 2-4 shows an example output from a software-based platform where the default redirection and assignment methods are used.

Figure 2-4 Command Output Sample 1: show ip wccp service_group# detail

Figure 2-5 shows an example output from a hardware-based platform that is configured for L2 redirect and mask assignment. The CLI output is slightly different, reflecting these configured parameters.

Figure 2-5 Command Output Sample 2: show ip wccp service_group# detail

show wccp WAAS Command Outputs

You can use the show wccp WAAS commands that are available from the WAE CLI to verify that WCCP is configured and operating properly.

The command syntax is as follows:

show wccp {services | status | routers | gre}

Figure 2-6 shows output examples of the show wccp services, show wccp status, and show wccp routers WAAS commands.

Figure 2-6 Command Output: show wccp services, show wccp status, and show wccp routers

Figure 2-7 shows an output example of the show wccp gre WAAS command.

Figure 2-7 Command Output: show wccp gre

Verifying Inline Interception

Figure 2-8 and Figure 2-9 show how to use the show interface command to verify inline interception configuration and proper operation.

Figure 2-8 Command Output Sample 1: show interface

The differences between the two operating modes are as follows:

•Intercept operating mode—Packets are passed to WAAS for potential optimization.

•Bypass operating mode—Mechanical bypass between ports in InLineGroup during failure or administrative shutdown.

Figure 2-9 Command Output Sample 2: show interface

For more information about troubleshooting WCCP, see the WAAS Troubleshooting Guide available on Cisco DocWiki.