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4. Set up IPv6 Router Advertisement Daemon (RADVD)
IPv6 Router Advertisement Daemon (RADVD) broadcasts auto-configuration parameters and
responds to Router Solicitations from clients that are trying to configure. A Router Advertisement
message is issued periodically by a router or in response to a Router Solicitation message from a
host. These Router Advertisements tell a client whether to assign itself an IP address or obtain
one from a DHCPv6 server.
Command
Parameter
Description
Gateway(config)# ipv6 radvd
Enable Router Advertisement. This option
allows the router to reply to the Router
Solicitation messages.
Gateway(config)# ipv6 radvd
apply
Apply RADVD configurations.
Gateway(config)# ipv6 radvd
[unsolicited-multicast | unicast-
only]
[unsolicited-
multicast |
unicast-only]
Specify advertise mode. Unsolicited
Multicast indicates the router periodically
broadcasts Router Advertisement messages
and responds to Router Solicitations from
clients. Unicast Only indicates the router
only responds to Router Solicitations from
clients.
Gateway(config)# ipv6 radvd
interval [5-1800]
[5-1800]
Enter in seconds the delay between
broadcasts.
Gateway(config)# ipv6 radvd
ra-managed-flag
Enable to allow clients to obtain address
configuration information via Dynamic Host
Configuration Protocol (DHCPv6).
Gateway(config)# ipv6 radvd
ra-mtu [0 | 1200-1500]
[0 | 1200-1500] Enter the largest packet (in bytes) that can
be sent without fragmentation in the MTU
field. The MTU is determined by the ISP but
is normally 1500 bytes.
Gateway(config)# ipv6 radvd
ra-other-flag
Enable to allow clients to obtain other
configuration information via DHCPv6.
Gateway(config)# ipv6 radvd
rdnss
Enale to let IPv6 issued out by Router
Advertisement, including default gateway,
address assignment and DNS.
Gateway(config)# ipv6 radvd
router-lifetime [0 | 1800-9000]
[0 | 1800-9000] Enter (in seconds) how long a route created
by the Router Advertisement message
should remain valid in the Router Lifetime
field.
Gateway(config)# ipv6 radvd
router-preference [low |
medium | high]
[low | medium |
high]
Choose the preference from theRouter
Preference drop-down list to change the
preference of this router over other default
routers. The router preferences option is
used when multiple routers are available.
The hosts can choose the desired router that
helps them on suboptimal routing and can
also redirect the routes for the host.
No Command
Gateway(config)# no ipv6
radvd
Disable RADVD function.
Gateway(config)# no ipv6
Set advertise back to default.