
Configuring IP Exterior Gateway Protocols (BGP and EGP)
4-6
308628-15.0 Rev 00
Negotiating the BGP Version
BGP peers negotiate the version of BGP that they will use to exchange routing
information. If you enable both BGP-3 and BGP-4, the router first attempts to use
BGP-4. If the BGP peer is not a BGP-4 speaker, the router uses BGP-3.
By default, BGP considers BGP-4 as both the minimum and maximum acceptable
version for negotiation.
You can use the BCC or Site Manager to specify BGP-3 as the minimum or
maximum acceptable version.
Using the BCC
To specify the minimum version, go to a BGP peer prompt
(for example,
box; ip;
/jointfilesconvert/97454/bgp; peer/2.2.2.2/2.2.2.3
) and
enter:
min-version
<
version>
version
is either
/jointfilesconvert/97454/bgp3
or
/jointfilesconvert/97454/bgp4
(default).
To specify the maximum version, go to a BGP peer prompt
(for example,
box; ip;
/jointfilesconvert/97454/bgp; peer/2.2.2.2/2.2.2.3
) and
enter:
max-version
<
version>
version
is either
/jointfilesconvert/97454/bgp3
or
/jointfilesconvert/97454/bgp4
(default).
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