Troubleshooting guide

1-20
Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Configuring Traffic Interception
Configuring WCCP on WAEs
Step 9 (Optional) From the Assignment Method drop-down list, choose the type of WAE load-balancing
assignment method to use (for more information, see the “Information About Load Balancing and
WAEs” section on page 1-11):
• Choose Hash to use the hash method (the default for devices using WAAS versions earlier than 5.0).
Follow Steps 10 and 11 to define how the hash works, and skip to Step 13 because the mask settings
are not used.
• Choose Mask to use the mask method (the default for devices using WAAS versions 5.0 or later).
Skip to Step 12 to define the service mask.
Step 10 (Optional) To define the load-balancing hash for WCCP service ID1 on the source IP address, check the
Hash on Source IP check box. This check box is shown only if the hash assignment method is used.
Step 11 (Optional) To define the load-balancing hash for WCCP service ID1 on the destination IP address, check
the Hash on Destination IP check box. This check box is shown only if the hash assignment method is
used.
Step 12 (Optional) To use a custom service mask, enter different mask values in the WCCP Assignment Settings
for Load Balancing area, overwriting the default mask settings. If you do not change these settings, the
defaults are used. Define the custom mask as follows:
• In the Source IP Mask field, specify the IP address mask defined by a hexadecimal number (for
example, FE000000) used to match the packet source IP address. The range is 00000000–FE000000.
The default is F00.
• In the Destination IP Mask field, specify the IP address mask defined by a hexadecimal number (for
example, FE000000) used to match the packet destination IP address. The range is
0000000–FE000000. The default is 0.
Note If you apply the default mask to a WAE running version 4.1.x or earlier, the mask is different
from the default mask (0x1741) set under software version 4.1.x and earlier.
If the WAE detects that its configured mask is not the same as advertised by one or more routers in the
farm, it is not allowed to join the farm and a major alarm is raised (“Configured mask mismatch for
WCCP”). This alarm can occur when a WAE is trying to join a farm that already has other WAEs and
these other WAEs are configured with a different mask. The routers do not allow other WAEs to join the
farm unless they advertise the same mask. To correct this alarm, ensure that all WAEs in the farm are
configured with the same mask. This alarm is cleared when the WAE’s configured mask matches the
mask of all the routers in the farm.
Step 13 From the Redirect Method drop-down list, choose the type of packet redirection (forwarding) method to
use:
• WCCP GRE (the default for devices using WAAS versions earlier than 5.0) to use Layer 3 GRE
packet redirection.
• WCCP L2 (the default for devices using WAAS versions 5.0 or later) to permit the WAE to receive
transparently redirected traffic from a WCCP Version 2-enabled switch or router if the WAE has a
Layer 2 connection with the device and the device is configured for Layer 2 redirection. For more
information, see the “Information About Packet-Forwarding Methods” section on page 1-14.
Step 14 From the Return Method drop-down list, choose the type of method to use to return nonoptimized
(bypassed) packets to the router:
• WCCP GRE (the default) to use GRE packet return.
• WCCP L2 to use Layer 2 rewriting for packet return.