Allied Telesis AT-WA7500 - Manual (Page 118)

5 - Configuring the Spanning Tree
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‰ One IP multicast address can be used to create a practically
unlimited number of tunnels to remote IP subnets. For help, see
Using One IP Multicast Address for Multiple IP Tunnels on
page 119.
Once you have configured the IP tunnels, the root access point sends IP
hello messages to each IP address in its IP address list. An IP tunnel is
automatically established when an access point on a remote IP subnet
receives this hello message. This access point then transmits IP hello
messages on its subnet so that other access points on the same subnet
that do not receive hello messages can also attach to the spanning tree.
To create a unicast IP tunnel
1. Make sure that end devices that will roam between the root IP subnet
and the remote IP subnet have IP addresses from the root IP subnet
and have their default router set the same as the root access point.
There are no address restrictions for non-IP end devices.
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 109.
4. On the access point at the endpoint of the IP tunnel, set the Mode
parameter to Listen.
5. On the root access point, select IP Tunnels then 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, select Frame Type Filters. If you have end devices
communicating using IP, set these DIX filters to Pass:
‰ DIX-IP-TCP Ports
‰ DIX-IP-UDP Ports
‰ DIX-IP-Other Protocols
‰ DIX-IPX Sockets
‰ DIX-Other EtherTypes