August 2000
Intermediate to advanced
528 pages
12h 44m
English
Content preview from Internet Routing Architectures, Second Edition
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Route Filtering and Attribute Manipulation
Route filtering and attribute manipulation are the basis of implementing BGP policies. This section describes the following:
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BGP route maps
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Prefix lists
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Identifying and filtering routes based on the NLRI
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Identifying and filtering routes based on the AS_PATH
In order for new BGP policies such as attribute manipulation or filtering to be applied, a fresh set of the relevant routes must be presented to the Input Policy Engine. This can be accomplished in a number of ways. The brute-force way is to simply reset the BGP session by using the following command:
clear ip bgp [* | address | peer-group][soft [in|out]]
However, soft reconfiguration or BGP Route Refresh provide solutions that are ...
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