Troubleshooting guide

1-32
Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Configuring Traffic Interception
Configuring WCCP on WAEs
If you have only one WAE in the farm, you can use a point-to-point tunnel, however, ensure that the
router is configured with no other tunnel that has the same tunnel source as the WAE tunnel.
Note On the Catalyst 6500 series switch with the Supervisor Engine 32 or 720, do not configure more than
one GRE tunnel (multipoint or point-to-point) with the same tunnel source interface, otherwise, high
switch CPU load can result.
The tunnel interface must have a Layer 3 source interface to which it is attached and this source interface
must be the interface whose IP address is configured in the WAE’s intercepting router list.
The tunnel interface must be excluded from WCCP interception to avoid routing loops when outbound
interception is used. Use the ip wccp redirect exclude in command. You can always use this command
because it does not cause any impact even when it is not needed, such as for inbound interception.
This section contains the following topics:
• Multipoint Tunnel Configuration, page 1-32
• Point-To-Point Tunnel Configuration, page 1-33
Multipoint Tunnel Configuration
Consider a deployment in which there are two intercepting routers and two WAEs in the farm. Each WAE
configuration would look like the following example:
wccp router-list 1 192.168.1.1 192.168.2.1
wccp tcp-promiscuous service-pair 61 62
router-list-num-1
egress-method generic-gre
redirect-method gre
enable
Each router can configure a single multipoint GRE tunnel to the WAE farm.
The router 1 configuration would look like the following example:
interface gigabitEthernet 1/1
ip address 192.168.1.1 255.255.255.0
...
interface Tunnel1
ip address 12.12.12.1 255.255.255.0
tunnel source GigabitEthernet1/1
tunnel mode gre multipoint
ip wccp redirect exclude in
end
The router 2 configuration would look like the following:
interface Vlan815 1/0
ip address 192.168.2.1 255.255.255.0
...
interface Tunnel1
ip address 13.13.13.1 255.255.255.0
tunnel source vlan815
tunnel mode gre multipoint
ip wccp redirect exclude in
end