Nortel Networks 2300 manual Configuring AP access points

Configuring AP access points 233

●If the DHCP Ack message contained a list of WSS hostnames in DHCP option 43, the AP sends DNS Requests to the DNS server for the IP addresses of the switches, then sends a unicast Find WSS message to each address. The process continues with step 8.

Note. This method requires DNS address records on the DNS server that map the hostnames to the WSS IP addresses.

●If no WSS switches reply, the AP resends the Find WSS messages up to 11 more times. If no WSSs reply after all 12 attempts, the AP tries to find an WSS switch using the DNS server. The process continues with step 5.

5If the AP is unable to locate an WSS on the subnet it is connected to, and is unable to find an WSS based on DHCP option 43, the AP sends DNS requests to both NORTEL and wlan-switch, where the DNS suffix for mynetwork.com is learned through DHCP.

Note. You must configure a DNS address record on your DNS server for the WSS IP address. Otherwise, the DNS server cannot provide the WSS switch’s address to the AP.

6The DNS server replies with the system IP address of an WSS switch.

●If only NORTEL is defined in DNS, the AP sends a unicast Find WSS message to the WSS switch whose IP address is returned for NORTEL.

●If only wlan-switchis defined in DNS, the AP sends a unicast Find WSS message to the WSS switch whose IP address is returned for wlan-switch.

●If both NORTEL and wlan-switchare defined in DNS, the AP sends a unicast Find WSS message to the WSS switch whose IP address is returned for NORTEL. The AP ignores the IP address returned for wlan-switch.

●If both NORTEL and wlan-switchare defined in DNS, and the AP is unable to contact the IP address returned for NORTEL, the AP never contacts the IP address returned for wlan-switch. The AP does not boot.

7The AP sends Find WSS requests to the WSS IP addresses given by the DNS reply. If an WSS receives the Find WSS Request, the process continues with step 8.

However, if no WSS switches reply, the AP retries this method up to 11 more times:

●If no WSSs reply after all 12 attempts, the AP begins the process again with step 1 on the other AP port.

●If the other AP port does not have a link or the AP has only one port, the AP instead restarts, and begins the process again with step 1 on the same AP port.

8The WSS that receives the Find WSS request determines the best WSS for the AP to use, based on the bias settings for the AP on each switch. If more than one switch has high bias for the AP or all switches have the same bias, the WSS suggests the switch that has the highest capacity to add new active AP connections.

9The WSS sends a unicast Find WSS Reply message to the AP containing the system IP address of the best WSS switch to use.

10The AP sends a unicast message to the suggested WSS switch, to request a software image and configuration. If the AP does not receive a reply after 10 seconds, the AP reboots and starts the boot process over at step 1.

Nortel WLAN Security Switch 2300 Series Configuration Guide