Netgear WC7520 Manual de usuario Pagina 52

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Access Point Discovery and Management
52
ProSafe 20-AP Wireless Controller WC7520
An access point needs to run at least its initial firmware release or a newer version. There
are no other firmware requirements for the access point to function with the wireless
controller.
Guidelines for the Autodiscovery Process Across Layer 3 Networks
In addition to the previous general guidelines, for the autodiscovery process to work across
Layer 3 networks, enable either one of the following options:
Multicast routing fo
r IP address 254.0.100.250 between the wireless controller and the
access points.
DHCP
option 43 (vendor-specific information) on the DHCP server. Specify the wireless
controller’s IP address in hexadecimal format to allow the access points to receive the
wireless controller’s IP address and to allow the DHCP server to assign IP addresses to
the access points. The hexadecimal address needs to be preceded by the
vendor-specific octets 02:04:.
To compose the address, start with 02:04: and then add each of the four address
oct
ets in hexadecimal format, separated by colons. For example:
192.168.33.27 in decimal format equals c0:a8:21:1b in hexadecimal format. After you
have adde
d the vendor-specific octets, the complete address is 02:04:c0:a8:21:1b.
The DHCP server on the wireless controller automatically enables DHCP option 43 with
it
s own IP address.
Requirements for Autodiscovery of Remote Access Points
The wireless controller can autodiscover remote access point over a site-to-site VPN
connection or behind a remote NAT router without a VPN connection. Make sure that the
configuration meets the following general guidelines.
Guidelines for the Autodiscovery Process of Remote Access Points
All standalone access points need to have SNMP and SSH enabled.
Th
e following ports need to be unblocked in the firewall at the site where the wireless
controller is located in order for the remote access points to communicate with the
wireless controller:
- TCP
port 22. Used by Secure Shell (SSH) and Secure Copy (SCP) for the transfer of
software images and large configuration files and for the transfer over a tunnel.
- UDP p
ort 69. Used by TFTP for software image upgrades of standalone access
points.
- UDP p
ort 123. Used by Network Time Protocol (NTP).
- UDP p
ort 138. Used by NetBIOS to resolve names.
- UDP p
ort 161. Used by the SNMP discovery process.
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