Nortel 2350 Installation And Basic Configuration Manual page 104

104 Configuring a 2370, 2360, or 2380 Switch for Basic Service
Because distributed APs are not directly attached to a WSS, they require additional support from the network
in order to function. Information on the booting and operation sequence for Distributed APs is covered in the
"Configuring AP Access Points" chapter of the Nortel Mobility System Software Configuration Guide.
• Power—PoE must be provided on one of the Ethernet connections to the AP. Be sure to utilize a PoE
injection device that has been tested by Nortel. Providing PoE on both of the Ethernet connections (if the
AP has two) allows for redundant PoE.
• DHCP—A Distributed AP uses TCP/IP for communication, and relies on DHCP to obtain IP parameters.
Therefore, DHCP services must be available on the subnet that the AP is connected to. DHCP must
provide the following parameters to the AP:
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IP address
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Domain name
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DNS server address
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Gateway address
Optionally, the Offer message can also contain a list of WSS IP addresses or hostnames, in the
option 43 field of the DHCP message.
• DNS—If the intermediate network between the WSS and Distributed AP includes one or more IP routers,
create a NORTEL.mynetwork.com or wlan-switch.mynetwork.com entry on the DNS server. The entry
needs to map one of these names to the system IP address of the switch. If the subnet contains more than
one WSS in the same Mobility Domain, you can use the system IP address of any of the switches. (For
redundancy, you can create more than one DNS entry, and map each entry to a different WSS in the
subnet.)
The DNS entry allows the AP to communicate with a WSS that is not on the AP's subnet. If the
AP is unable to locate a WSS on the subnet it is connected to, the AP sends DNS requests to
both NORTEL and wlan-switch, where the DNS suffix for mynetwork.com is learned through
DHCP.
●
If only NORTEL is defined in DNS, the AP contacts the WSS whose IP address is returned
for NORTEL.
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If only wlan-switch is defined in DNS, the AP contacts the WSS whose IP address is
returned for wlan-switch.
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If both NORTEL and wlan-switch are defined in DNS, the AP contacts the WSS whose IP
address is returned for NORTEL. The AP ignores the IP address returned for wlan-switch.
●
If both NORTEL and wlan-switch are 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.
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