Chapter 1: Network Adapter Card Overview
38
adapter card to process tagged traffic from up to 16 different VLANs. The
protocol is described in Chapter 9, “AT-MUX Multiple VLAN Protocol” on
page 157.
Note
The AT-MUX protocol is compatible with Microsoft Windows 2000,
2003, and XP operating systems. You cannot use this protocol with
any other operating system.
The following briefly outlines the behavior of a network adapter card when
handling tagged and untagged VLAN traffic:
An adapter where no VIDs have been assigned accepts and transmits
only untagged packets. (An untagged packet does not contain a
header tag and, consequently, lacks VLAN identification.) The adapter
discards any tagged packets that arrive on the port.
An adapter where at least one VID has been assigned accepts only
those tagged packets with header tags that match the assigned VIDs.
The adapter discards all untagged packets as well as any tagged
packets with VIDs that do not match the VIDs assigned to the card.
Operating
Statistics and the
AT-Stat Utility
The AT-Stat utility can used to configure a card’s operating specifications
and display operating statistics. Functions include:
Displaying performance statistics, such as the number of packets sent
and received by a network adapter card.
Displaying the number of packet errors, such as CRC errors and
alignment errors.
Configuring the IP address, subnet mask, and gateway address.
Pinging another network device.
Performing a throughput test.
For instructions, refer to Chapter 8, “AT-Stat Utility” on page 133.
Note
The AT-Stat utility is compatible with Microsoft Windows 2000,
2003, and XP operating systems. This utility cannot be used with
any other operating system.
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