Allied Telesis AT-WA7501 - Manual (Page 143)

AT-WA7500 and AT-WA7501 Installation and User’s Guide
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2. Make sure that the root access point and the access point at the
endpoint of the IP tunnel have the same LAN ID.
3. On the root access point, set the Mode parameter to Originate if Root.
For help configuring a root access point, see “About the Primary LAN
and the Root Access Point” on page 131.
4. On the access point at the endpoint of the IP tunnel, set the Mode
parameter to Listen.
5. On the root access point, click IP Tunnels > IP Addresses. Enter the IP
address or DNS name of the access point at the endpoint of the IP
tunnel.
6. On the root access point and the access point at the endpoint of the IP
tunnel, click Frame Type Filters. If you have end devices
communicating using IP, set these DIX filters to Pass:
ˆ DIX-IP-TCP Ports
ˆ DIX-IP-UDP Ports
ˆ DIX-IP-Other Protocols
ˆ DIX-IPX Sockets
ˆ DIX-Other EtherTypes
7. On the root access point and the access point at the endpoint of the IP
tunnel, click Predefined Subtype Filters.
If you have end devices communicating using IP, set these filters to
Pass:
ˆ DIX ARP
ˆ ICMP
8. Click Submit Changes to save your changes. To activate your
changes, from the menu bar click Save/Discard Changes, and then
click Save Changes and Reboot. For help, see “Saving Configuration
Changes” on page 45.
Using One IP
Multicast
Address for
Multiple IP
Tunnels
IP tunneling supports IP multicast and Internet Group Management
Protocol (IGMP). IP multicast provides an ideal way to distribute IP hello
messages. These hello messages are only forwarded to those IP subnets
and IP hosts (such as access points) that participate in the multicast
group. IP multicast has these advantages:
ˆ You do not have to know the unicast or directed broadcast IP
addresses in advance.
ˆ IP multicast provides better built-in redundancy than IP unicast,
because any access point can establish an IP tunnel.