Allied Telesis AT-8700XL Series Switch - Manual (Page 81)

Maintenance and Troubleshooting 81
Software Release 2.6.1
C613-02030-00 REV B
Troubleshooting DHCP IP Addresses
Your switch is acting as a DHCP client
If your switch is acting as a DHCP client the switch should receive its IP
address dynamically. If your switch is not receiving an IP address, check that
the domain name and host name are correct.
Your switch is acting as a DHCP server
If your switch is not assigning IP addresses to a host, or hosts, on the subnet
perform this procedure:
1. Reboot the host machine, to force it to re-request IP settings.
2. Check the host’s TCP/IP settings.
In Microsoft® Windows™ 95/98, click Settings → Control Panel →
Network
. Select TCP/IP and click Properties. Click Obtain an IP address
automatically .
In Microsoft® Windows™ 2000, click Settings → Control Panel →
Network and Dial-up Connections
→ Local Area Connection →
Properties . Select Internet connection (TCP/IP) and click Properties. Click
Obtain an IP address automatically .
3. Check that the DHCP server has a large enough range of addresses. To
assign a range, enter the command:
CREATE DHCP RANGE
Using Trace Route for IP Traffic
You can use trace route to discover the route that packets pass between two
systems running the IP protocol. Trace route sends an initial UDP packets with
the Time To Live (TTL) field in the IP header set starting at 1. The TTL field is
increased by one for every subsequent packet sent until the destination is
reached. Each hop along the path between two systems responds with a TTL
exceeded packet and from this the path is determined. For more information
about trace route, see the Internet Protocol (IP) chapter in the AT-8700XL Series
Software Reference.
To initiate a trace route, enter the command:
TRACE [[IPADDRESS=]ipadd] [MAXTTL=number] [MINTTL=number]
[NUMBER=number] [PORT=port-number] [SCREENOUTPUT={YES|NO}]
[SOURCE=ipadd] [TIMEOUT=number] [TOS=number]
Any parameters not specified use the defaults configured with a previous
invocation of the command:
SET TRACE [[IPADDRESS=]ipadd] [MAXTTL=number] [MINTTL=number]
[NUMBER=number] [PORT=port-number] [SCREENOUTPUT={YES|NO}]
[SOURCE=ipadd] [TIMEOUT=number] [TOS=number]
As each response packet is received a message is displayed on the terminal
device from which the command was entered and the details are recorded. To
display the default configuration and summary information, enter the
command:
SHOW TRACE
To halt a trace route that is in progress, enter the command:
STOP TRACE