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Dynamic Host Configuration Protocol

  • Support for DHCPv6 server address pool obtained for router advertisement (NFX Series)—

    When an NFX router functions as both the DHCPv6 client and server, the prefix information received from the WAN side through DHCP-prefix delegation (PD) needs to be divided. This prefix information is used in multiple LAN side interfaces for router advertisement or for DHCPv6 server address pools. Starting in Junos OS Release 24.2R1, NFX Series routers support consistent division of the received prefix into sub-prefixes by providing new optional configuration for router advertisement or for the DHCP local server.

    See dhcpv6-client.

  • Support for deferred negative acknowledgement (deferred-NAK) Starting in Junos OS 24.2R1 release, the existing JUNOS DHCPV4/V6 Server 'FORCENEW/RECONFIGURE support now also supports a "deferred-NAK" option, whereby if the DHCP client does not immediately respond to the FORCE-RENEW/RECONFIGURE request (or any of its subsequent limited retries), the subscriber session is left in place with full connectivity and the session gets flagged for “deferred-NAK”. This session state is maintained persistently across daemon restarts and GRES/ISSU events.​