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Troubleshooting ip configurations – Allied Telesis AR300 SERIES ROUTER User Manual

Page 19

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A R 3 0 0 R O U T E R Q U I C K S T A R T G U I D E

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3 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 use the command:

TELNET 172.16.8.33

Note: We have used the Ethernet address in this example but you can
Telnet to any of the remote router’s assigned IP addresses.

Save the Configuration

Save the new dynamic configuration as a script, by entering
the command:

CREATE CONFIG=IPCONF.SCP

TROUBLESHOOTING IP CONFIGURATIONS

No Route Exists to the Remote Router

1 Wait for at least one minute to ensure that a RIP update has
been received.

2 Repeat steps 4 and 5 above. Check that the PPP link is
OPENED for both LCP and IP by entering the command:

SHOW PPP

The display should look like that shown above.

3 Try restarting the IP routing software (a warm restart), by
entering the command:

RESET IP

If the route still does not appear, contact your distributor or
reseller for assistance.

Telnet Fails

1 If Telnet to a router fails, check that the IP address you used
matches the one assigned to the router. Check that RIP is
configured correctly (steps 4 and 5 above). Check that the IP
Telnet server is enabled on each router, using the command:

SHOW IP

If the Telnet server is disabled, enable the Telnet server with
the command:

ENABLE IP TELNETSERVER

2 If Telnet into a host on the remote LAN fails, but works into
the remote router, check the IP address you are using is correct.
Check that both routers are gateways, not servers by typing:

SHOW IP

The “IP Packet Forwarding” field in the output should be set to
“Enabled”. The host’s TCP/IP software should be configured to
use the Head Office router as its gateway. Refer to the
documentation for the host TCP/IP software for more
information about configuring a gateway.

3 Contact your distributor or reseller for assistance.

Example output from the SHOW IP

ROUTE command for a basic TCP/IP

network.

Example output from the SHOW PPP

command for a basic TCP/IP network.

IP Routes

-------------------------------------------------------------------------------

Destination Mask Nexthop Interface Age

DLCI/Circ. Type Policy Protocol Metric Preference

-------------------------------------------------------------------------------

172.16.8.0 255.255.255.0 0.0.0.0 eth0 1382

- direct 0 interface 1 0

172.16.31.0 255.255.255.0 172.16.254.2 ppp0 71

- remote 0 rip 16 100

172.16.254.0 255.255.255.0 0.0.0.0 ppp0 1382

- direct 0 interface 1 0

-------------------------------------------------------------------------------

Name Enabled ifIndex Over CP State

-----------------------------------------------------------------------------

ppp0 YES 04 IPCP OPENED

isdn-roho LCP OPENED

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