3Com 3CRWX120695A, 3CRWX440095A Configuration Manual page 124

124 C 6: C
HAPTER ONFIGURING
MAP A P
CCESS OINTS
Continuing the DHCP process, MAP sends a DHCP Request to one of the
DHCP servers that sent an Offer message, and receives an Ack from the
server. MAP then configures itself with the information contained in the
Offer message from that server.
3 MAP sends a Find WX message to UDP port 5000 on the subnet
broadcast address.
WX switches in the same IP subnet as the MAP receive the message
and respond with a Find WX Reply message.
If the MAP is configured as a Distributed MAP on a switch and the
connection bias is high, the WX switch immediately sends a Find
WX Reply message.
If the MAP is configured as a Distributed MAP on a switch but the
connection bias is low, that WX switch waits one second, then
sends a Find WX Reply message. The delay allows switches with
high bias for the MAP to respond first.
If a WX switch that receives the Find WX message does not have
the Distributed MAP in its configuration but another WX switch in
the same Mobility Domain does, the switch waits two seconds,
then sends a Find WX Reply message with the IP address of the
best switch to use. The determination of best switch is based on
the bias settings for the MAP on each switch and on the capacity
of each switch to add new active MAP connections.
The process skips to step 8.
If no WX switches are present on the IP subnet, the MAP does not
receive any Find WX Reply messages. The process continues with
step 4.
4 If the MAP is unable to locate a WX on the subnet it is connect to, the
MAP sends a DNS request for the IP address associated with the
hostname 3COMWX.domain-name.
You must configure a DNS address record on your DNS server for the WX
IP address. Otherwise, the DNS server cannot provide the WX switch's
address to the MAP.
5 The DNS server replies with the system IP address of a WX switch.
If only 3COMWX is defined in DNS, the MAP sends a unicast Find WX
message to the WX switch whose IP address is returned for 3COMWX.
6 The MAP sends a Find WX request to the WX IP address in the DNS reply.