Users Guide

BGP 1415
When processing list terms, a match for any term indicates a match and
processing stops.
Routing Policy Changes
When the user makes a routing policy configuration change, Dell EMC
Networking BGP automatically applies the new policy. Like any other
configuration change, routing policy changes are immediately saved in the
running configuration, as soon as the user enters the command.
Even though policy configuration changes are committed to the running
configuration immediately, they do not take operational effect until three
minutes after the last configuration change. The delay allows the user time to
make other configuration changes or correct any mistakes before the change
takes effect. If another event, such as receipt of an UPDATE message or a
neighbor established event triggers the decision process while waiting for the
three minutes to expire, then the decision process runs at the time of the
event using the old policy configuration. To immediately apply policy
changes, the clear ip bgp command can be issued to trigger an immediate soft
reset.
In response to a change to an outbound policy, BGP recomputes update group
membership and advertises updates to the affected peer to reflect the change
in policy.
In response to a change of an inbound policy, BGP schedules phase 1 of the
decision process. If the policy change is neighbor-specific, phase 1 only re-
evaluates routes received from that neighbor. If the change is global, phase 1
re-evaluates all routes. If an affected neighbor supports Route Refresh, BGP
sends a ROUTE REFRESH message to the neighbor, and applies the new
policy to the UPDATE messages received in response. If a neighbor does not
support Route Refresh, BGP applies the new policy to path information
previously received from the neighbor. As with outbound policy, inbound
policy changes are immediately committed to the running configuration but
do not take effect for three minutes. The soft reset is deferred for three
minutes to allow configuration changes to be finalized before they are
applied. The clear ip bgp command can be issued to trigger an immediate soft
reset, if desired.