Allied Telesis at-8700xl series switch manual Troubleshooting IP Configurations, Telnet Fails

80 AT-8700XL Series Switch User Guide

If PING to the end destination fails, PING intermediate network addresses. If you can successfully PING some network addresses, and not others, you can deduce which link in the network is down.

Note that if Network Address Translation (NAT) is configured on the remote switch,

PINGing devices connected to it may give misleading information.

For more information about using PING, see the Internet Protocol (IP) chapter in the AT-8700XL Series Software Reference.

Troubleshooting IP Configurations

Telnet Fails

1.If Telnet to switch fails

Check that the IP address you used matches the one assigned to the switch. To check that RIP is configured correctly, enter the command:

SHOW IP RIP

To check that the IP Telnet server is enabled on each switch, enter the command.

SHOW IP

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

ENABLE TELNETSERVER

2.If Telnet to host fails

If Telnet into a host on the remote LAN fails, but works into the remote switch, check that the IP address you are using is correct. To check that both switches are gateways, not servers, enter the command:

SHOW IP

The “IP Packet Forwarding” field in the output should be set to “Enabled”. Refer to the documentation for the host TCP/IP software for more information about configuring a gateway.

The host’s TCP/IP software should be configured to use the Head Office switch as its gateway. Refer to the documentation for the host TCP/IP software for more information about configuring a gateway.

3.Contact your authorised distributor or reseller for assistance

If problems persist, contact your authorised distributor or reseller for assistance.

Software Release 2.6.1 C613-02030-00 REV B