We currrently have a 1gb link between S4 and External FW. We want to add a 10gb link and then remove the 1gb. The 10gb link is a different /30 ntwk. Can I add this as a second default route and when traffic starts using it I would remove the 1gb link. Will traffic automatically switch over since the link cost is lower. Trying to migrate without a hard cutover. OSPF environment.
thnks in advance