ip prefix-list A permit 0.0.0.0/0 ge 32 The above statement will match only hosts. ip prefix-list B permit 128.0.0.0/2 ge 17 The above statement will match Any subnet in a class B address space. ip prefix-list C permit 0.0.0.0/0 le 32 The above statement will match all routes. ip prefix-list D permit 0.0.0.0/0 The above statement will match… Read More »
BGP is an Exterior Gateway Routing Protocol and BGP is used for exchanging the routing information between the auto system numbers. Let’s look into some of the BGP’s basic features. BGP Keypoints..! BGP is a Path Vector Protocol. BGP is an open standard protocol. BGP is an exterior gateway routing protocol and it is designed for inter-AS domain… Read More »
BGP is an exterior gateway routing protocol and it is used to exchange the routes or prefixes between the AS Numbers on the internet. Before I go ahead let me tell you 3 RFCs to read and also you can read Jeff Doyles TCP/IP Vol-2, This book is one of my favorite and very easy to understand.RFC4271RFC4276RFC4277 Before… Read More »
The Bogon filtering can be done by using static or dynamic. The disadvantage of static filtering is you have to update your filtering list on a daily basis because the bogon lists change according to the allocation of prefixes by the internet registry. As the bogon lists are very large in number it’s very difficult to configure all… Read More »
The bogon Prefixes are the type of Prefixes that are not routable on the global internet or you can say these prefixes even do not exist on the internet so these Prefixes are not allocated by IANA or any of your local internet registry (Such as AFRINIC, ARIN, APNIC, LACNIC,RIPE NCC etc etc.). A packet routed over the… Read More »
In this post we will be talking about the BGP community in real-world for manipulating the incoming traffic of your ASN, As we know that most of the large Content providers have their predefined community value, and based on that community value they implement their inbound and outbound traffic policy.So you as an ISP customer need to signal… Read More »
