Guidelines And Limitations For Bgp; Default Settings; Configuring Advanced Bgp; Configuring Bgp Session Templates - Cisco Nexus 3000 Series Configuration Manual

Guidelines and Limitations for BGP

S e n d d o c u m e n t c o m m e n t s t o n e x u s 3 k - d o c f e e d b a c k @ c i s c o . c o m
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Guidelines and Limitations for BGP
BGP has the following configuration guidelines and limitations:
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Default Settings

Table 6-1
Table 6-1
Parameters
BGP feature
keep alive interval
hold timer

Configuring Advanced BGP

This section describes how to configure advanced BGP and includes the following topics:
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Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, NX-OS Release 5.0(3)U1(1)
6-10
You must explicitly configure an address family under a neighbor for the BGP session
establishment.
The dynamic AS number prefix peer configuration overrides the individual AS number
configuration inherited from a BGP template.
If you configure a dynamic AS number for prefix peers in an AS confederation, BGP establishes
sessions with only the AS numbers in the local confederation.
BGP sessions created through a dynamic AS number prefix peer ignore any configured eBGP
multihop time-to-live (TTL) value or a disabled check for directly connected peers.
Configure a router ID for BGP to avoid automatic router ID changes and session flaps.
Use the maximum-prefix configuration option per peer to restrict the number of routes received and
system resources used.
Configure the update-source to establish a session with eBGP multihop sessions.
Specify a BGP route map if you configure redistribution.
Configure the BGP router ID within a VRF.
If you decrease the keepalive and hold timer values, the network might experience session flaps.
lists the default settings for BGP parameters.
Default BGP Parameters
Configuring BGP Session Templates, page 6-11
Configuring BGP Peer-Policy Templates, page 6-13
Configuring BGP Peer Templates, page 6-16
Configuring Prefix Peering, page 6-18
Configuring BGP Authentication, page 6-19
Resetting a BGP Session, page 6-20
Chapter 6
Default
disabled
60 seconds
180 seconds
Configuring Advanced BGP