3Com Switch 5500-EI User Manual

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Setting Up Your Switch 59
CAUTION: To protect your switch from unauthorized access, you must
change all three default passwords as soon as possible, even if you do not
intend to actively manage your switch. For more information on the
default user names and changing the default passwords, see
“Changing
the Default Passwords” on page 73.
IP Configuration You can use one of the following methods to provide IP information to
your switch. This step is essential if you wish to manage your switch over
the network.
Manual IP Configuration
When you configure the IP information, the switch retains that
information that you enter until you change it again.
You should use the Manual IP configuration method if:
■ you do not have a DHCP or BootP server on your network
■ you want to remove the risk of the IP address ever changing
■ your DHCP or BootP server does not allow you to allocate static IP
addresses. Static IP addresses are necessary to ensure that the switch is
always allocated the same IP information.
For most installations, 3Com recommends that you manually configure
the switch’s IP information. This makes management simpler and more
reliable since it does not depend on a DHCP or BootP server. It also
eliminates the risk of the IP address changing.
To manually enter the switch’s IP information, refer to the section entitled
“Manually Configuring the IP Information” section on page 61.
Automatic IP Configuration using DHCP
By default, the switch automatically attempts to acquire its IP address
from a DHCP server on the network. If you are using this method, make
sure your DHCP server assigns the switch a static IP address so that you
know what that IP address will be at all times.
If you do not know what the IP address is and it will be difficult to
manage your switch. Most DHCP servers allow static IP address
configurations. Refer to your DHCP server documentation for
instructions.
10014925-AD_S5500_GSG.book Page 59 Thursday, August 16, 2007 12:29 PM

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