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If your host has more than one IP address, (for example, one ATM interface and one
Token-Ring interface), you must add one network interface for each IP address. The
TURBOWAYS 622 PCI MMF ATM Adapter supports multiple network interfaces.
Configuring with PVCs
Users must configure PVCs in ATM-attached hosts, gateways, and switches. For
environments requiring the transfer of several protocols over the same VCI or support
for inverse ARP (address resolution protocol) requests, LLC (logical link control)
encapsulation is provided. If LLC support is enabled, the system issues inverse ARP
requests on the VPI:VCI connection to automatically discover the destination's IP
address.
This request is issued every minute until the destination IP address is found. After the
destination IP address is found, inverse ARP requests are issued every 15 minutes to
verify that the connection has not changed. If automatic destination address discovery
by inverse ARP is either declined or not supported at the destination, the destination IP
address must be specified.
Networking with ATM SVCs
Networking with ATM SVCs (swiched virtual circuits) is different from networking with
ATM PVCs. PVCs are created by users during configuration of ATM-attached hosts,
gateways, and switches. These static connections remain established until they are
removed by configuration changes. To establish complete connectivity, a connection
must be configured and maintained from each node to every other node. This process
can become labor-intensive as the number of connections grows rapidly with the
addition of nodes. Using SVCs avoids this complexity.
An IP subnet using SVCs consists of an ATM switch, an ARP server, and ARP clients.
During network initialization, endpoints automatically open signaling channels to obtain
their 20-byte ATM address from the switch. Using the ARP server and ATM address
provided by the user at the time of configuration, clients open a connection with the
subnet's ARP server and register both their IP and ATM addresses.
Note: Each subnet requires one ATM ARP server. When a client station needs to
Changing ATM Adapter Characteristics
The TURBOWAYS 622 PCI MMF ATM Adapter's characteristics are automatically set
during system boot, and these settings are designed to provide optimum performance.
If you are an experienced user and want to change the adapter characteristics, use the
instructions in this section.
20
Installation and Using Guide
transmit to another station, the ARP server is called. If the destination's IP
address is registered with the server, the destination's ATM address is resolved.
The caller now has the destination ATM address and requests a connection to
that station through the ATM switch. The switch creates a VPI:VCI connection
from the caller to the destination.
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