Dell N3200-ON Networking N-Series Switches User Guide version 6.8.0 - Page 1359

decision process applies outbound policy to routes in the local RIB and determines the status of aggregate routes. Active aggregates and individual routes that pass outbound policy are placed in an Adj-RIB-Out specific to each update group, and UPDATE messages are sent to communicate the routes to neighbors. Figure 38-1. BGP Decision Process Update Update RX Network routes Pass redist yes Policy? Best route changes Next-hop resolution RTO AdjRIB-In AcceptRIB-In DEC PROC P1 (inbound policy, calc local pref) DEC PROC P2 (best route selection) Loc-RIB DEC PROC P3 (outbound policy, incl. aggregation) Adj-RIB AOduj-tRIBOAdujt-RIBOut Update BGP Route Selection Dell Networking BGP uses the following route selection rules in order from 1 to N: 1 Prefer the route with the higher local preference 2 Prefer a locally-originated route over a non-locally originated route 3 Prefer the route with the shorter AS Path 4 Prefer the route with the lower ORIGIN. IGP is better than EGP is better than INCOMPLETE. BGP 1359