Administrator Guide

Defaults Enabled.
Command Modes ROUTER BGP
Command
History
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.2.1.0 Introduced on the E-Series ExaScale.
7.4.1.0 Introduced
Usage
Information
The bgp log-neighbor-changes command appears in the show config command output.
Related
Commands
show config – views the current configuration.
bgp non-deterministic-med
Compare MEDs of paths from different autonomous systems.
C9000 Series
Syntax
bgp non-deterministic-med
To return to the default, use the no bgp non-deterministic-med command.
Defaults Disabled (that is, paths/routes for the same destination but from different ASs do not have their MEDs
compared).
Command Modes ROUTER BGP
Command
History
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.2.1.0 Introduced on the E-Series ExaScale.
7.4.1.0 Introduced
Usage
Information
In non-deterministic mode, paths are compared in the order in which they arrive. This method can lead to
the system choosing different best paths from a set of paths, depending on the order in which they are
received from the neighbors because MED may or may not get compared between adjacent paths. In
Deterministic mode (no bgp non-deterministic-med), the system compares MED between
adjacent paths within an AS group because all paths in the AS group are from the same AS.
When you change the path selection from deterministic to non-deterministic, the path selection for
existing paths remains deterministic until you enter the clear ip bgp command to clear existing paths.
bgp recursive-bgp-next-hop
Enable next-hop resolution through other routes learned by BGP.
C9000 Series
Syntax
bgp recursive-bgp-next-hop
To disable next-hop resolution, use the no bgp recursive-bgp-next-hop command.
448 Border Gateway Protocol