update-time

Configures the interval at which BGP next-hop tables are modified. BGP next-hop tables should always have IGP (non-BGP) routes.

Syntax

update-time sec

no update-time sec

Command Default

This option is disabled.

Parameters

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

Modes

BGP address-family IPv4 unicast configuration mode

BGP address-family IPv6 unicast configuration mode

BGP address-family IPv4 unicast VRF configuration mode

BGP address-family IPv6 unicast VRF configuration mode

Usage Guidelines

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

The update time determines how often the device computes the routes (next-hops). 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 subsecond time.

Note

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

Examples

This example sets the BGP4+ update-time interval to 30.

device# configure terminal
device(config)# router bgp
device(config-bgp-router)# address-family ipv6 unicast vrf red
device(config-bgp-ipv6u-vrf)# update-time 30