Specifications

IP Switching Commands
ipv6 cef distributed
ISW-79
Cisco IOS IP Switching Command Reference
May 2008
ipv6 cef distributed
To enable distributed Cisco Express Forwarding for IPv6 (dCEFv6), use the ipv6 cef distributed
command in global configuration mode. To disable dCEFv6, use the no form of this command.
ipv6 cef distributed
no ipv6 cef distributed
Syntax Description This command has no arguments or keywords.
Command Default dCEFv6 is disabled on the Cisco 7500 series routers and enabled on the Cisco 12000 series Internet
routers.
Command Modes Global configuration
Command History
Usage Guidelines The ipv6 cef distributed command is similar to the ip cef distributed command, except that it is
IPv6-specific.
Enabling dCEFv6 globally on the router by using the ipv6 cef distributed in global configuration mode
distributes the CEF processing of IPv6 packets from the Route Processor (RP) to the line cards of
distributed architecture platforms.
Note The ipv6 cef distributed command is not supported on the Cisco 12000 series Internet routers because
dCEFv6 is enabled by default on this platform.
Note To forward dCEFv6 traffic on the router, configure the forwarding of IPv6 unicast datagrams globally
on your router by using the ipv6 unicast-routing global configuration command, and configure an IPv6
address and IPv6 processing on an interface by using the ipv6 address interface configuration command.
Release Modification
12.0(22)S This command was introduced.
12.2(13)T This command was integrated into Cisco IOS Release 12.2(13)T.
12.2(14)S This command was integrated into Cisco IOS Release 12.2(14)S.
12.2(28)SB This command was integrated into Cisco IOS Release 12.2(28)SB.
12.2(25)SG This command was integrated into Cisco IOS Release 12.2(25)SG.
12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(33)SXH This command was integrated into Cisco IOS Release 12.2(33)SXH.