Enterasys atx Betriebsanweisung
1-8
Introduction
With an innovative, multiple RISC processor architecture, the
ATX’s Packet Processing Engine is capable of filtering and
forwarding at full line speed. Further, the ATX’s protocol-
independence and high performance allow for transparent, plug-
and-play network operation. The ATX offers all the benefits of
interconnecting LANs across a backbone with an increase in
performance over existing bridges.
ATX’s Packet Processing Engine is capable of filtering and
forwarding at full line speed. Further, the ATX’s protocol-
independence and high performance allow for transparent, plug-
and-play network operation. The ATX offers all the benefits of
interconnecting LANs across a backbone with an increase in
performance over existing bridges.
1.6.1 Netbios Name Caching
The ATX provides the capability of transforming certain Netbios
broadcast frames into non-broadcast frames. The specific frames
handled by Netbios Name Caching are those which seek to locate
another netbios station. These include Datagrams, Name Query,
and Name Recognized frames. For Netbios Name Caching to
function, it must be enabled on all ports for which Netbios traffic
exists.
broadcast frames into non-broadcast frames. The specific frames
handled by Netbios Name Caching are those which seek to locate
another netbios station. These include Datagrams, Name Query,
and Name Recognized frames. For Netbios Name Caching to
function, it must be enabled on all ports for which Netbios traffic
exists.
When the ATX receives any of these frames and Netbios Name
Caching is enabled on the port the frame was received on, the ATX
will identify the frame as a special Netbios Name Caching frame.
Once identified, a couple of actions takes place. First, the ATX
learns the Source Netbios name, the MAC address of the source
workstation, which port the station lives on and any applicable RIF
information. Second, the ATX determines if the destination
Netbios name has been learned. If the Netbios name is learned,
then the ATX replaces the broadcast address with the learned
unicast address, constructs an appropriate RIF is applicable, and
directs the frame to the appropriate port.
Caching is enabled on the port the frame was received on, the ATX
will identify the frame as a special Netbios Name Caching frame.
Once identified, a couple of actions takes place. First, the ATX
learns the Source Netbios name, the MAC address of the source
workstation, which port the station lives on and any applicable RIF
information. Second, the ATX determines if the destination
Netbios name has been learned. If the Netbios name is learned,
then the ATX replaces the broadcast address with the learned
unicast address, constructs an appropriate RIF is applicable, and
directs the frame to the appropriate port.
The ATX posseses name caching, the ability to reduce the amount
of broadcasts of certain Netbios session initialization frames.
Name Caching works by using certain frames (Name_Query
request and Name_Recognized response) within the Netbios
architeture to identify workstation names and their respective
hardware MAC address. Once the ATX identifies a workstation
and its hardware MAC address, the workstation no longer needs
to flood broadcasts to locate a particular destination on the
network; the ATX replaces the broadcast address with the learned
of broadcasts of certain Netbios session initialization frames.
Name Caching works by using certain frames (Name_Query
request and Name_Recognized response) within the Netbios
architeture to identify workstation names and their respective
hardware MAC address. Once the ATX identifies a workstation
and its hardware MAC address, the workstation no longer needs
to flood broadcasts to locate a particular destination on the
network; the ATX replaces the broadcast address with the learned