User's Manual

Table Of Contents
SPEEDLAN 8500 Series Installation and Operation User Guide
6-8 Bridging Setup
Interface Threshold
This setting determines the maximum number of broadcast or multicast packets that can
occur during a one-second period before a storm is declared for the assigned interface.
Once it is determined that a storm is occurring, any additional broadcast or multicast
packets received on that interface will be denied until the storm is determined to be over.
The storm will be determined to be over once a one-second period has occurred with no
broadcast or multicast packets received on that interface. The settings for broadcast packets
and multicast packets are configured independently.
Preset Button
This button sets the broadcast and multicast storm thresholds to the recommended values.
These values have been determined to offer good protection without interfering with the
operation of the typical network. These values may need to be tuned for your particular
network.
Tunnel Partners Button
Click Tunnel Partners to encapsulate Ethernet packets received from the local interface in an IP/
UDP packet and then send them to one or more tunnel partners. Tunneling can be used to set up
virtual Ethernet networks. In the General Setup dialog box, if the Remote Bridging using IP
Tunnels is enabled, Tunnel Partners can be set up. This dialog box specifies the IP addresses of
each of the IDU/routers that are to participate in the tunnel group. Specify the addresses of all
the IDUs that are participating in the tunnel group but DO NOT specify the IP addresses on
this IDU.
Encrypt IDU Tunnel Packets
If purchased, a IDU (from Wave Wireless) may contain a special software-encryption algo-
rithm that is distinct from the optional SPEEDLAN encryption chip on the IDU. If Data
Encryption is enabled on the General Setup dialog box and if an Encryption Key is set up in
the Data Encryption menu, enabling encryption here will cause all Ethernet packets trans-
mitted to tunnel partners to be encrypted and encapsulated inside IP packets. The IP packet
itself cannot be encrypted because industry-standard IP routers, like those on the Internet,
would not be able to forward the encrypted packets.