will forward packets destined to 1.0.0.0/8 via the interface / next-hop determined in the previous step.do a route-lookup to determine what egress interface and next-hop to use to send traffic to 120.0.4.17.determine that the next-hop for this network is 120.0.4.17.Network Next Hop Metric LocPrf Weight Pathįor example, if router needs to forward traffic destined to a device within 1.0.0.0/8 range, it will RPKI validation codes: V valid, I invalid, N Not found Origin codes: i - IGP, e - EGP, ? - incomplete X best-external, a additional-path, c RIB-compressed, R RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter, Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, CE1#show ip bgpīGP table version is 38, local router ID is 192.168.3.231 Router’s BGP table is populated with BGP routes and associated Next-Hop attributes.
#1 hop path update#
The NEXT_HOP is a well-known mandatory attribute that defines the IP address of the router that SHOULD be used as the next hop to the destinations listed in the UPDATE message.īasically, Next-Hop forces the router to do a recursive lookup in order to determine which egress interface should be used to send the packets out. RFC 4271 defined Next-Hop attribute as follows: What does it do? Should I use it on my network? What will happen if I forget to configure it? Today we’ll try to answer these questions. One of the common questions asked by people who begin their BGP journey is related to BGP ‘Next-Hop Self’ configuration option.
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