Troubleshooting guide

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Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Planning Your WAAS Network
Identifying and Resolving Interoperability Issues
periodically to identify flow changes. However, the WAAS system expects packets to appear in the
sequence of packets belonging to class C1, followed by a sequence of C2, and so forth, so that a
polling method is sufficient to track such dynamic changes.
Note This dynamic classification support requires support for marking DSCP/ToS settings, as
specified in the “WAAS Support of the Cisco IOS QoS Classification Feature” section on
page 1-11, as well as the tracking of dynamic changes through polling.
Several router configurations need to be followed in order to ensure NBAR-WAAS compliance, and you
must ensure that the following router configurations are adhered to:
• Ensure that classification is followed by proper DSCP marking.
• Ensure that the router in general (IP access lists that are configured on the router) does not scrub
DSCP/TOS settings that are already marked on the packets on entry, and that NBAR does not
unmark marked packets.
WAAS Support of the Cisco IOS Marking
The Cisco IOS marking feature is supported by the WAAS software.
WAAS Support of the Cisco IOS Queuing
The Cisco IOS queuing feature for congestion management is supported by the WAAS software.
WAAS Support of the Cisco IOS Congestion Avoidance
The Cisco IOS congestion avoidance feature is supported by the WAAS software.
WAAS Support of the Cisco IOS Traffic Policing and Rate Limiting
The Cisco IOS traffic policing and rate-limiting feature is only partially supported by the WAAS
software. This Cisco IOS feature will work properly when enabled on an outbound interface. However,
when this feature is enabled on an inbound interface, it will see both compressed and uncompressed
traffic, and will result in inaccurate rate limiting.
WAAS Support of the Cisco IOS Signaling
The Cisco IOS signaling (RSVP) feature is typically implemented in MPLS networks. Because the
WAAS software does not interact with MPLS RSVP messages, the RSVP feature is supported.
WAAS Support of the Cisco IOS Link-Efficiency Operations
The Cisco IOS link-efficiency operations are supported by the WAAS software.