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Riverstone Networks RS Switch Router User Guide Release 8.0 11-15
IP Routing Configuration Guide Configuring Router Discovery
On systems that support IP multicasting, router advertisements are sent to the ‘all-hosts’ multicast address 224.0.0.1
by default. You can specify that broadcast be used, even if IP multicasting is available. When router advertisements
are sent to the all-hosts multicast address or an interface is configured for the limited broadcast address
255.255.255.255, the router advertisement includes all IP addresses configured on the physical interface. When router
advertisements are sent to a net or subnet broadcast, then only the address associated with the net or subnet is included.
To start router discovery on the RS, enter the following command in Configure mode:
The
rdisc start
command lets you start router discovery on the RS. When router discovery is started, the RS
multicasts or broadcasts periodic router advertisements on each configured interface. The router advertisements
contain a list of addresses on a given interface and the preference of each address for use as the default route on the
interface. By default, router discovery is disabled.
The
rdisc add address
command lets you define addresses to be included in router advertisements. If you
configure this command, only the specified hostname(s) or IP address(es) are included in the router advertisements.
For example::
By default, all addresses on the interface are included in router advertisements sent by the RS. The
rdisc add
interface
command lets you enable router advertisement on an interface. For example::
If you want to have only specific addresses included in router advertisements, use the
rdisc add address
command
to specify those addresses.
The
rdisc set address
command lets you specify the type of router advertisement in which the address is included
and the preference of the address for use as a default route. For example, to specify that an address be included only
in broadcast router advertisements and that the address is ineligible to be a default route:
The
rdisc set interface
command lets you specify the intervals between the sending of router advertisements
and the lifetime of addresses sent in a router advertisement. To specify the maximum time between the sending of
router advertisements on an interface:
rs(config)# rdisc start
rs(config)# rdisc add address 10.10.5.254
rs(config)# rdisc add interface rs4
rs#(config) rdisc set address 10.20.36.0 type broadcast preference
ineligible
rs#(config) rdisc set interface rs4 max-adv-interval 1200