Configuring Networking
IPv6
Cisco RV220W Administration Guide 47
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A host uses the information to learn the prefixes and parameters for auto-
configuration. Disabling this feature effectively disables auto-configuration,
requiring manual configuration of the IPv6 address, subnet prefix, and
default gateway on each device.
• Advertise Mode—Choose one of the following options:
- Unsolicited Multicast—Select this option to send Router Advertisement
messages to all interfaces in the multicast group. If you choose this
option, also enter the Advertise Interval, which is the interval at which
Router Advertisement messages are sent. Enter any value between 10
and 1800 seconds. The default is 30 seconds.
- Unicast only—Select this option to send Router Advertisement
messages only to well-known IPv6 addresses.
• RA Flags—Choose whether or not to use stateful configuration protocols.
When both flags are enabled, hosts obtain addresses and other information
through DHCPv6 or other methods (not router advertisements). When both
flags are disabled, hosts obtain addresses and other information through
router advertisements.
- Managed—When enabled, this flag instructs hosts to use an
administered /stateful configuration protocol (DHCPv6) to obtain stateful
addresses.
- Other—When enabled, this flag instructs hosts to use an administered/
stateful configuration protocol (DHCPv6) to obtain other, non-address
information, such as DNS server addresses.
• Router Preference—Choose Low, Medium, or High. This preference
metric is useful in a network topology in which multi-homed hosts have
access to multiple routers. This metric helps a host to choose an appropriate
router. If two routers are reachable, the one with the higher preference will be
chosen. These values are ignored by hosts that do not implement router
preference. The default setting is High.
• MTU—Enter the size of the largest packet that can be sent over the network.
The MTU (Maximum Transmission Unit) is used in Router Advertisement
messages to ensure that all nodes on the network use the same MTU value
when the LAN MTU is not well-known. The default setting is 1500 bytes. This
is the standard value for Ethernet networks. For PPPoE connections, the
standard is 1492 bytes. Unless your ISP requires a different setting, this
setting should not be changed.
• Router Lifetime—Enter the time in seconds that the Router Advertisement
messages will exist on the route. The default is 3600 seconds.
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