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Command Reference Guide
Global Configuration Mode Command Set
ipv6 unicast-routing
Use the ipv6 unicast-routing command to enable Internet Protocol version 6 (IPv6) unicast routing and
specify the router as an IPv6 neighbor. Use the no form of this command to disable the IPv6 routing
subsystem, remove any routing protocol entries from the IPv6 routing table, cease IPv6 routing functions,
and disable IPv6 unicast routing.
Syntax Description
No subcommands.
Default Values
By default, IPv6 unicast routing is disabled.
Command History
Release 18.1
Command was introduced.
Functional Notes
This ipv6 unicast-routing command functions similarly to the ip routing command for IPv4 services. In
order to enable IPv6 unicast routing, you must first configure interfaces to use IPv6 before IPv6
communication takes place. When IPv6 unicast routing is enabled globally, the router flag is set to 1 in
neighbor advertisement (NA) messages.
Using the no form of this command disables the IPv6 routing subsystem, removes any routing protocol
entries from the IPv6 route table, causes IPv6 routing functions to cease, and disables IPv6 unicast
routing. In addition, NA
messages are sent at each interface indicating the neighbor is no longer a router (router flag is set to 0),
and that the router is no longer the default router for any advertised prefixes. When IPv6 unicast routing is
disabled, the existing IPv6 configuration is retained, but no IPv6 packets are routed and no routing
resources are consumed.
If IPv6 unicast routing is not enabled, but an interface has IPv6 enabled, that interface may communicate
as an IPv6 host to other devices. If IPv6 packets are received that are not addressed to that interface, the
packets are dropped.
Usage Examples
The following example enables IPv6 unicast routing and specifies the router as an IPv6 neighbor:
(config)#ipv6 unicast-routing
60000CRG0-35E
Copyright © 2012 ADTRAN, Inc.
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