DIGITAL GIGAswitch/Router User Reference Manual
67
Configuring Router Discovery
To display IP information, enter the following command in Enable mode:
Configuring Router Discovery
The router discovery server on the GSR periodically sends out router advertisements to
announce the existence of the GSR to other hosts. The router advertisements are multicast
or broadcast to each interface on the GSR on which it is enabled and contain a list of the
addresses on the interface and the preference of each address for use as a default route for
the interface. A host can also send a router solicitation, to which the router discovery
server on the GSR will respond with a unicast router advertisement.
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 and stop router discovery on the GSR, enter the following commands in
Configure mode:
Show ARP table entries.
arp show all
Show IP interface configuration.
interface show ip
Show all TCP/UDP connections
and services.
ip show connections [no-lookup]
Show configuration of IP interfaces.
ip show interfaces [
<interface-name>
]
Show IP routing table information.
ip show routes
Show ARP entries in routing table.
ip show routes show-arps
Show DNS parameters.
system show dns
Start router discovery.
rdisc start
Stop router discovery.
rdisc stop
