3Com 3CRWX120695A, Configuration Manual

Page: 190 / 728

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ONFIGURING
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OINTS
Static IP Address Configuration for Distributed MAPs
In cases where DHCP is not available, you can manually assign IP address
information to a Distributed MAP. This information is configured through
the CLI.
You can configure the following information for a Distributed MAP:
a IP address, subnet mask, default gateway router, and whether the
configured static IP address information is enabled for the MAP.
b The IP address of a suitable WX switch for the MAP to use as a boot
device.
c The fully qualified domain name of a WX switch to use as a boot
device, and the IP address of a DNS server used to resolve the WX
switch’s name.
These items are referred to by letter in the description of how the MAP
contacts a WX switch in “How a Distributed MAP Contacts a WX Switch
(Statically Configured Address)” on page 193. If the MAP does not have
static IP address information configured, or its static IP configuration is
disabled, then the MAP obtains its IP address through DHCP.
Contacting a WX
Switch
After the MAP has an IP address, it attempts to contact a WX switch on
the network. The method used for contacting a WX switch depends on
whether the MAP’s IP address was obtained through DHCP or was
configured statically.
How a Distributed MAP Contacts a WX Switch (DHCP-Obtained
Address)
1 If the DHCP Offer message contained WX IP addresses or fully qualified
hostnames in the Option 43 field, the MAP proceeds as follows:
„
If the DHCP Offer message contained one or more IP addresses in the
Option 43 field, the MAP sends a unicast Find WX message to each
address. The process skips to step 6.
„
If the DHCP Offer message contained one or more hostnames in the
Option 43 field, the MAP sends DNS Requests to the DNS server for
the IP addresses of the hosts, then sends a unicast Find WX message
to each address. The process skips to step 6.
This method requires DNS address records on the DNS server that map
the hostnames to the WX IP addresses.