asset tracking

Traditionally, asset tracking could not control the Frame Relay DE bit. The default Frame Relay DE setting was 0, and only the Frame Relay switch on the service provider network entry point could set this bit to 1 if the CIR was violated. However, the class-based marking feature was enhanced in Cisco IOS Software Release 12.2(2)T to allow the router to control this bit; it provided the option of setting the bit to 1 before traffic exits the router, and it supported the capability to read the bit upon traffic ingress. Therefore, although the Frame Relay DE bit is a fairly crude marking option, it can be used in a Frame Relay network to indicate high-priority traffic (DE bit 0, the default value) and lower-priority traffic (DE bit 1), which can be dropped should congestion occur. The following is an example of how the Frame Relay DE bit can be set with class-based marking on traffic that previously was identified as out-of-contract

In older Cisco IOS releases, class-based marking is dependent on CEF. Therefore, whenever MQC set commands are to be used, ip cef already must be enabled within the configuration. In later Cisco IOS releases, this asset tracking restriction has been lifted