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As shown in the example, the computer audit software parameters to the match protocol statement can be given in decimal, hexadecimal (the 0x notation), or binary (the 10001b notation) numbers. Individual numbers separated by commas can be specified, and ranges of numbers can be used, as in the case of 4 0x10, which means a decimal value of 4 to a hexadecimal value of 10 (which equates to a decimal value of 16). Therefore, all RTP payload types between 4 and 16 are matched for this part of the statement. Similarly, the binary range 10001b to 10010b equates to 17 to 18 in decimal
Class-based marking, introduced in Cisco IOS Software Release 12.1(2)T, is an MQC-based syntax that uses the set command within a policy map to mark packets, frames, cells, or labels. Class-based marking was CEF dependent in early Cisco IOS releases (just after its introduction), but this limitation was listed in subsequent releases soon afterward. If you are using one of the initial releases, ip cef must be enabled in the global configuration before using set commands of computer audit software
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