510 Software Group

set interfaces tunnel TXT dhcp-interface TXT

This sets the local-ip address of a tunnel to the IPv4 address obtained from an interface configured by dhcp.

set protocols static route IPV4NET dhcp-interface TXT
set protocols static table U32<1-200> route IPV4NET dhcp-interface TXT

This sets the next-hop IPv4 address of a static route to the IPv4 address of a router obtained from an interface configured by dhcp.