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Hierarchy Level


Configure settings for a 6rd concentrator used to process IPv6 packets encapsulated in IPv4 packets.

The v6rd statement is supported only on the MS-DPC, MS-100, MS-400, and MS-500 line cards. The v6rd statement is not supported on MS-MPCs and MS-MICs.


ipv4-prefix—IPv4 prefix of the customer edge (CE) network

ipv6-prefix—IPv6 prefix of the 6rd domain.

mtu-v4 Maximum transmission unit (MTU), in bytes (576 through 9192), for IPv6 packets encapsulated into IPv4. If the final length is greater than the configured value, the IPv4 packet will be dropped.

address—IPv4 address of a softwire concentrator. This is an IPv4 address independent of any interface and on a different prefix.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 10.4.

Support added in Junos OS release 20.2R1 for the v6rd concentrator at the [edit services softwires softwire-types edit hierarchy for Next Gen Services on MX240, MX480, and MX860 routers.