BGP Next Hop attribute

Every time a route announcement crosses an AS boundary, the Next Hop attribute is changed to the IP address of the border router that announced the route.

AS 6431

AT&T Research

135.207.0.0/16

Next Hop = 12.125.133.90

AS 7018

AT&T

AS 12654

RIPE NCC

RIS project

12.125.133.90

12.127.0.121

135.207.0.0/16

Next Hop = 12.127.0.121

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