Troubleshooting guide

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Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Configuring Traffic Interception
Using Policy-Based Routing Interception
Edge-Router1(config)# interface FastEthernet0/0.10
b. Specify that the LAN router interface should use the WAAS-EDGE-LAN route map for PBR:
Edge-Router1(config-if)# ip policy route-map WAAS-EDGE-LAN
c. Enter interface configuration mode:
Edge-Router1(config-if)# interface Serial0
d. Specify that the WAN router interface should use the WAAS-EDGE-WAN route map for PBR:
Edge-Router1(config-if)# ip policy route-map WAAS-EDGE-WAN
Step 8 In the data center, apply the route maps to the LAN interface (ingress interface) and the WAN interface
(egress interface) on Core-Router1:
a. On Core-Router1, enter interface configuration mode:
Core-Router1(config)# interface FastEthernet0/0.10
b. Specify that for PBR, the LAN router interface should use the WAAS-CORE-LAN route map:
Core-Router1(config-if)# ip policy route-map WAAS-CORE-LAN
c. Enter interface configuration mode:
Core-Router1(config-if)# interface Serial0
d. Specify that for PBR, the WAN router interface should use the WAAS-CORE-WAN route map:
Core-Router1(config-if)# ip policy route-map WAAS-CORE-WAN
Methods of Verifying PBR Next-Hop Availability
When using PBR to transparently redirect traffic to WAEs, we recommend that you use one of the
following methods to verify the PBR next-hop availability of a WAE. The method that you choose is
based on the version of the Cisco IOS software that is running on the routers and the placement of your
WAEs. However, method 2 is the preferred method whenever possible:
• Method 1—If the device sees the WAEs as a CDP neighbor (directly connected), it can use CDP and
ICMP to verify that the WAE is operational. For more information, see the “Method 1: Using CDP
to Verify Operability of WAEs” section on page 1-40.
• Method 2 (Recommended method)—If the device is running the Cisco IOS software Release 12.4
or later and the device does not see the WAE as a CDP neighbor, IP service level agreements (SLAs)
can be used to verify that the WAE is operational using ICMP echoes. For more information, see the
“Method 2: Using IP SLAs to Verify WAE Operability Using ICMP Echo Verification
(Recommended Method)” section on page 1-40.
• Method 3—If the device is running the Cisco IOS software Release 12.4 or later and does not see
the WAE as a CDP neighbor, IP SLAs can be used to verify that the WAE is operational using TCP
connection attempts. For more information, see the “Method 3: Using IP SLAs to Verify WAE
Operability Using TCP Connection Attempts” section on page 1-41.
Note In this section, device is used to refer to the router or switch that has been configured to use PBR to
transparently redirect traffic to a WAE.