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11-24
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
Chapter 11 Configuring Advanced BGP
Configuring Advanced BGP
Disabling Capabilities Negotiation
You can disable capabilities negotiations to interoperate with older BGP peers that do not support
capabilities negotiation.
To disable capabilities negotiation, use the following command in neighbor configuration mode:
Configuring eBGP
This section includes the following topics:
• Disabling eBGP Single-Hop Checking, page 11-24
• Configuring eBGP Multihop, page 11-25
• Disabling a Fast External Fallover, page 11-25
• Limiting the AS-path Attribute, page 11-25
Disabling eBGP Single-Hop Checking
You can configure eBGP to disable checking whether a single-hop eBGP peer is directly connected to
the local router. Use this option for configuring a single-hop loopback eBGP session between directly
connected switches.
To disable checking whether or not a single-hop eBGP peer is directly connected, use the following
command in neighbor configuration mode:
Command Purpose
nexthop route-map
name
Example:
switch(config-router-af)# nexthop
route-map nextHopLimits
Specifies a route map to match the BGP next-hop
route to. The name can be any case-sensitive
alphanumeric string up to 63 characters.
Command Purpose
dont-capability-negotiate
Example:
switch(config-router-neighbor)#
dont-capability-negotiate
Disables capabilities negotiation. You must
manually reset the BGP sessions after configuring
this command.
Command Purpose
disable-connected-check
Example:
switch(config-router-neighbor)#
disable-connected-check
Disables checking whether or not a single-hop
eBGP peer is directly connected. You must
manually reset the BGP sessions after using this
command.
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