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Wireless AP: startup
Discovery and registration
Discover step 2: static IP address
You can specify a list of static IP addresses of the HiPath Wireless Controllers on your network.
On the Wireless AP Configuration screen "Static Configuration" tab, add the addresses to the
"Wireless Controller Search List".
Care must be taken when setting or changing these values. Wireless APs configured
statically will connect only to HiPath Wireless Controllers in the list. Improperly
configured Wireless APs will not be able to connect to a non-existent HiPath
Wireless Controller address and therefore will not be able to receive a corrected
Discovery step 3: the DHCP and unicast SLP solution
To use the DHCP and unicast SLP discovery method, you must ensure that the DHCP server
on your network supports Option 78 (DHCP for SLP RFC2610). The Wireless APs use this to
discover the HiPath Wireless Controller.
This solution takes advantage of two services that are present on most networks:
DHCP (Dynamic Host Configuration Protocol), the standard means of providing IP
addresses dynamically to devices on a network.
SLP (Service Location Protocol), a means of allowing client applications to discover
network services without knowing their location beforehand. Devices advertise their
services, using a Service Agent. In larger installations, a Directory Agent collects
information from Service Agents and creates a central repository (SLP RFC2608).
The HiPath Wireless Controller contains an SLP Service Agent that, when it starts up, queries
the DHCP server for Option 78 and if found, registers itself with the Directory Agent as service
type "siemens". The HiPath Wireless Controller contains a Directory Agent (slpd).
The Wireless AP queries DHCP servers for Option 78 in order to locate any Directory Agents.
The Wireless AP's SLP User Agent will then query the DAs for a list of "siemens" Service
Option 78 needs to be set for the subnets connected to the ports of the HiPath Wireless
Controller and the subnets connected to the Wireless APs. These should contain an identical
list of Directory Agent IP addresses.
Discovery step 4: the DNS solution
If no Directory Agent is found, or if it has no "siemens" Service Agents registered, the Wireless
AP will attempt to locate a HiPath Wireless Controller via DNS.
If you choose to use this method for discovery, place an "A" record in the DNS server for
"Controller.<domain-name>". The <domain-name> is optional, but if you use one, ensure that
it is listed with the DHCP server.
A31003-W1010-A100-1-7619, July 2005
HiPath Wireless Controller, Access Points and Convergence Software V3.0: User Guide