Allied Telesis AR700 SERIES Software Release 2.7.1 - Manual (Page 90)

90 AR700 Series Router User Guide
Software Release 2.7.1
C613-02047-00 REV A
3. Test the configuration.
Check the IP configuration using the following commands and then
functionally test the configuration by establishing a Telnet (remote access)
connection to the remote router.
To check the routes, enter the command (on either router):
show ip route
For each router, there should be a route to the LAN and PPP interfaces on
the local router and a route to the LAN interface on the remote router.
Test the PPP link between the two routers using the PING command on
each router to send ping packets to the router at the remote end of the PPP
link. On the Head Office router, enter the command:
ping 192.168.31.30
On the Remote Office router, enter the command:
ping 172.16.8.33
Within a few seconds the router will display a message like:
Echo reply 1 from 172.16.8.33 time delay 20 ms
indicating a response was received from the router at the remote end of the
PPP link.
To functionally test the connection between the two routers, use Telnet to
establish a connection to the remote router. Enter the following command
on the Head Office router to connect to the Remote Office router:
telnet 192.168.31.30
You will see the login screen for the Remote Office router. To connect from
the Remote Office router to the Head Office router, on the Remote Office
router, enter the command:
telnet 172.16.8.33
4. Save the configuration
To save the new dynamic configuration as a script, enter the command:
create config=ipconf.scp
Configuring IP Multicasting
IP multicasting is used to transmit packets to a group of hosts simultaneously
on a TCP/IP network or sub-network. Network bandwidth is saved because
files are transmitted as one data stream and are split apart by the router to the
target stations at the end of the path.
The multicast environment consists of senders (IP hosts), routers and switches
(intermediate forwarding devices) and receivers (IP hosts). Any IP host can
send packets to a multicast group, in the same way that they send unicast
packets to a particular IP host, by specifying its IP address. A host need not
belong to a multicast group in order to send packets to the multicast group.
Packets sent to a group address are only received by members of the group.
For multicasting to succeed, the router needs to know which of its interfaces
are directly connected to members of each multicast group. To establish this,
the router uses Internet Group Management Protocol (IGMP) for multicast
group management. IGMP is used between hosts and multicast routers and