![]() ![]() All neighbors within a peer group have the same outgoing policy (and thus the same NLRIs). The router would fail due to CPU and memory limits.Īll neighbors with identical outgoing policies would receive the same NLRIs. Imagine this for a RIB containing over 500.000 prefixes and a BGP process with hundreds of peers. For a router with 1000 prefixes and 10 neighbors this could lead to the generation of 10000 NLRIs, many of which would be duplicates of each other. CISCO ASR BGP SOFT RESET UPDATEOut of every prefix a NLRI would be created and these NLRIs would be put into updates (multiple packets if the update is large). Originally (before IOS 12.0) when a router needed to create updates for a neighbor it would scan its BGP table. Let’s start with the solution most people know. To explain the difference and the goals of both peer groups and templates we have to explore them both. But if that’s the case what are the peer groups used for? And what’s the difference between the two? This post will answer exactly those questions. These groups help you manage larger configurations, or at least that is what you’ve been told.īGP peer groups are not designed to manage large BGP configurations. Most people who have done a little more than basic BGP configuration have encountered BGP peer groups. ![]()
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