One quick question.. Does the subnet mask defined in a prefix list be the same as the entries on a BGP table or routing table ?
for eg if i have 10 * /32 routes on a particular router (10 different loopbacks), can i have a single prefix list with the aggregate address defined ? or do i need to have 10 different rules on the prefix list to allow the /32's ?
note - im not summarizing anywhere to convert the /32's to /24's.. they are just plain /32's on BGP table..
------>One quick question.. Does the subnet mask defined in a prefix list be the same as the entries on a BGP table or routing table ?
No , It is not requried. The network in routing table & define prefix can be different.
----- >for eg if i have 10 * /32 routes on a particular router (10 different loopbacks), can i have a single prefix list with the aggregate address defined ? or do i need to have 10 different rules on the prefix list to allow the /32's ?
Yes you can have single prefix-list to define all 10 loopback address. But here you can't create single prefix with /32 for all of them. You have to create less than /32 . ( prefix-list xx seq 10 permit 10.x.x.x/24 ) or what ever you want.
In your senario if you wnat to filter teh router without aggregation the you should go with Distribution-list. Prefix list give you to play with prefix not with IP route.
Here you can get an good example.
prefix-list xx seq 10 permit 188.8.131.52/16 ge 18
The statement above allows any route announcement in the range of 184.108.40.206 - 220.127.116.11 but that announcement must have a length greater than 18 bits in the mask. This permits you to allow announcements in the range, but not an announcement equalling the entire range (/16), or even announcements of half the range (/17). Only announcments with a length "greater than or equal to" /18 will be permitted
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...