Configuring DHCPv6 service requirements

Syntax:

ipv6 nd ra managed–config–flag

no ipv6 nd ra managed–config–flag

ipv6 nd ra other–config–flag

no ipv6 nd ra other–config–flag

managed–config–flag : Controls the M-bit setting in RAs the router transmits on the current VLAN. Enabling the M-bit directs clients to acquire their IPv6 addressing and ND host configuration information for the current VLAN interface from a DHCPv6 server.

  • When the M-bit is enabled, receiving hosts ignore the other–config–flag (O-bit) setting described below.

  • When the M-bit is disabled (the default), receiving hosts expect to receive their IPv6 addressing and ND configuration settings from the RA unless the O-bit is enabled.

other–config–flag : Ignored unless the M-bit (above) is disabled in RAs. Controls the O-bit in RAs the router transmits on the current VLAN.

Enabling the O-bit while the M-bit is disabled directs hosts on the VLAN to acquire their ND configuration settings from a DHCPv6 server and their global unicast prefixes from the RA.

The no form of either command turns off (disables) the setting for that command in RAs.

NOTE:

In the default configuration, both the M-bit and the O-bit are disabled, and a host receiving the RA must acquire its prefix and ND configuration from the RA itself and not from a DHCPv6 server.

Default for both settings: Disabled