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The number of significant bits is described by the prefix-length component of the match prefix.Note Because the configuration of route filters includes setting up prefixes and prefix.This section discusses the following topics: Radix Trees To understand the operation of a route filter, you need to be familiar with a device.Figure 1: Beginning of a Radix Tree Because this is binary, each bit can have only one of two possible valuesa 0.
Figure 3: Second Step of a Radix Tree This step-by-step process continues for 33 total levels to represent every possible. IP address. The radix tree structure is helpful when locating a group of routes that all share the. Figure 4: Locating a Group of Routes Configuring Route Filters Note The. If you omit prefix-length for an IPv4 prefix, the default is 32. If you omit prefix-length for an IPv6 prefix, the default is 128. The source-address-filter option is typically used to match an incoming route. For examples of the match types and the results when presented with various routes. The actions can consist of one or more of the actions described in Actions in Routing Policy Terms. In a route filter you can specify actions in two ways: In the route-filter or source-address-filter optionThese. The upto and prefix-length-range match types are similar in that. The difference is that upto allows you to specify an upper limit only for the prefix. Prefix List Match Type Match Criteria address-mask netmask-value All of the following are true: The bit-wise logical AND of the netmask-value pattern. The bits set in the netmask-value pattern do not need to be contiguous. The address-mask routing policy match type enables you to match an incoming. IPv4 or IPv6 route address on a configured netmask address in addition to the length of a. When the longest-match lookup is performed on a route filter, the lookup evaluates an address-mask match type differently from other routing policy match types. The lookup. For more information about this route filter match type, see How an Address Mask Match Type Is Evaluated. For example configurations showing route filters that contain the address-mask match type, see the following topics: Accepting Incoming IPv4 Routes by Applying an Address Mask to the Route Address and. Accepting Incoming IPv4 Routes with Similar Patterns But Different Prefix Lengths. Evaluation of an Address Mask Match Type with Longest-Match Lookup.
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