Update-time (bgp) – Brocade Network OS Command Reference v4.1.0 User Manual

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Network OS Command Reference

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update-time (BGP)

Configures the interval at which BGP next-hop tables are modified.

Synopsis

update-time sec

no update-time sec

Operands

sec

Update time in seconds. Range is from 0 through 30. Default is 5 seconds.

Defaults

This option is disabled.

Command Modes

BGP address-family IPv4 unicast configuration mode

Description

Use this command to configure the interval at which BGP next-hop tables are modified. BGP
next-hop tables should always have IGP (non-BGP) routes.

Usage Guidelines

The update time determines how often the device computes the routes (next-hops) in an RBridge.
Lowering the value set by the update-time command increases the convergence rate.

By default, the device updates the BGP4 next-hop tables and affected BGP4 routes five seconds
following IGP route changes. Setting the update time value to 0 permits fast BGP4 convergence for
situations such as a link failure or IGP route changes, starting the BGP4 route calculation in
sub-second time.

Use the no form of this command to restore the defaults.

NOTE

Use the advertisement-interval command to determine how often to advertise IGP routes to the
BGP neighbor.

Examples

To permit fast convergence:

switch(config)# rbridge-id 10

switch(config-rbridge-id-10)# router bgp

switch(config-bgp-router)# address-family ipv4 unicast

switch(config-bgp-ipv4u)# update-time 0