Dell EMC Configuration Guide for the S3100 Series 9.14.2.4

Route-refresh

This section explains how the soft-reconfiguration and route-refresh works. Soft-reconfiguration has to be configured explicitly for a neighbor unlike route refresh, which is automatically negotiated between BGP peers when establishing a peer session.

The route-refresh updates will be sent, only if the neighbor soft-reconfiguration inbound command is not configured in a BGP neighbor and when you do a soft reset using clear ip bgp {neighbor-address | peer-group-name} soft in command.

If the neighbor soft-reconfiguration inbound command is already configured in the BGP neighbor, the route refresh updates will not be sent. If you want to use route-refresh updates instead, remove the neighbor soft-reconfiguration inbound configuration and do a hard reset once, using clear ip bgp {* | as-number | ipv4| ipv6 | neighbor-address | peer-group-name} command. If you remove neighbor soft-reconfiguration inbound configuration for an individual neighbor (not part of peer-group), it is sufficient to do a hard reset only for the individual neighbor. If the neighbor is part of a peer-group and when neighbor soft-reconfiguration inbound is removed from the peer group, you need to do a hard reset for the peer-group.

If neighbor soft-reconfiguration inbound command is not configured ever in the router, then doing a soft reset is enough for the route-refresh updates to be sent.