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192 CHAPTER 10: CONFIGURING MAP ACCESS POINTS
If only wlan-switch is defined in DNS, the MAP sends a unicast Find
WX message to the WX switch whose IP address is returned for
If both 3Com and wlan-switch are defined in DNS, the MAP sends a
unicast Find WX message to the WX switch whose IP address is
returned for 3Com. The MAP ignores the IP address returned for
If both 3Com and wlan-switch are defined in DNS, and the MAP is
unable to contact the IP address returned for 3Com, the MAP never
contacts the IP address returned for wlan-switch. The MAP does not
5 The MAP sends Find WX requests to the WX IP addresses given by the
DNS reply. If a WX receives the Find WX Request, the process continues
with step 6.
However, if no WX switches reply, the MAP repeatedly retries this
If still no WX switches reply, the MAP begins the process again,
starting with the procedure under “How a Distributed MAP Contacts
a WX Switch (DHCP-Obtained Address)” on page 190, on the other
If the other MAP port does not have a link or the MAP has only one
port, the MAP instead restarts, and begins the process again on the
same MAP port.
6 6 The WX that receives the Find WX request determines the best WX for
the MAP to use, based on the bias settings for the MAP on each switch. If
more than one switch has high bias for the MAP or all switches have the
same bias, the WX suggests the switch that has the highest capacity to
add new active MAP connections.
7 The WX sends a unicast Find WX Reply message to the MAP containing
the system IP address of the best WX switch to use.
8 The MAP sends a unicast message to the suggested WX switch, to
request an operational image. If the MAP does not receive a reply after
10 seconds, the MAP reboots and starts the boot process over.
If a MAP does not receive a reply to a DNS request or a request for an
operational image after one minute, the MAP starts the boot process over
with a new DHCP Discover message, this time from MAP port 2.