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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical bgp route-map
Hi all, Wondering if anyone would know whether such feature in IOS exists or not... Most of the time, people use route-maps on bgp neighbors or peer-groups to set an attribute,etc on a prefix that is being announced OUTbound or INbound. However: On prefixes being announced to me INBOUND, is there a feature to set in route-map so that it checks whether the advertised prefix is already existing in local RIB? Like for example, I am one of the users who receive bogon advertisements from Rob's route-server. Now, when I receive prefixes either from my upstream AS or my customers doing bgp with me, I can setup a route-map on the neighbor so that it compares the prefix being announced by neighborAS with existing Rob's bogon prefix in the RIB with bogon route-server community 65333:888. If the prefix being announced gets a match with existing prefix with 65333:888 already in the router, the route-map would cause a DENY. Thus, making Rob's bogon announcement from his route-server, a bogon route filtering list for me to use on my customers/peers.. If you are not understanding what I am saying, feel free to yell at me to clear up.. This would make it much easier to create dynamic bgp-based route filtering list in my opinion... I am not here to discuss the feasibility of whether doing or inventing this dynamic method of filtering bgp routes; I am rather asking this question to see if anyone is doing something similar to this as it may be useful. Thanks! -hc -- Sincerely, Haesu C. TowardEX Technologies, Inc. WWW: http://www.towardex.com E-mail: [email protected] Cell: (978) 394-2867
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