Dell Force10 Z9000, Reference Manual

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Usage
Information
In Non-Deterministic mode, paths are compared in the order in which they arrive. This method
can lead to FTOS 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
),
FTOS 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 the 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.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax bgp recursive-bgp-next-hop
To disable next-hop resolution, use the
no bgp recursive-bgp-next-hop
command.
Defaults Enabled
Command Modes ROUTER BGP
Command History
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 7.8.1.0 Introduced on the S-Series.
Version 7.7.1.0 Introduced on the C-Series.
Version 7.2.1.0 Introduced.
Usage
Information
This command is a knob to disable BGP next-hop resolution using BGP learned routes. During
the next-hop resolution, only the first route that the next-hop resolves through is verified for the
route’s protocol source and is checked if the route is learned from BGP or not.
The
clear ip bgp
command is required for this command to take effect and to keep the
BGP database consistent. Execute the
clear ip bgp
command right after executing this
command.
Related
Commands clear ip bgp – clears the ip bgp.
bgp regex-eval-optz-disable
Disables the Regex Performance engine that optimizes complex regular expression with BGP.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax bgp regex-eval-optz-disable
To re-enable optimization engine, use the
no bgp regex-eval-optz-disable
command.
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