
Configuring DLSw Services
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Boundary Access Node
The Boundary Access Node (BAN) is an IBM router enhancement. BAN refers to
the RFC 1490 specification for Bridged SNA over Frame Relay. The associated
IBM NCP 7.3 enhancement is called the Boundary Node Identifier (BNI).
Since BAN carries the destination and source MAC addresses in the network
packets, this format carries more bits per packet and requires less configuration.
Standard BAN uses the Source Route Bridge frame format with local termination.
Bay Networks routers select BAN when you configure the Frame Relay network
with source route encapsulation.
DLSw Filtering
Bay Networks provides two prioritization mechanisms that affect DLSw traffic:
• DLSw prioritization
• Protocol prioritization
DLSw Prioritization
DLSw prioritization allows you to prioritize traffic within DLSw based on
predefined or user-defined fields. Examples of DLSw prioritization criteria
include
• Source and destination SAP. Use this field to assign NetBIOS traffic (SAP
0xF0) to a lower priority than SNA traffic.
• Source and destination MAC address. Use this field to provide host bound
traffic preference over other traffic.
• Any field in the SNA Transmission Header (TH) and Response/Request
Header (RH). Use this field to provide Class Of Service (COS) priority
preference.
You can also prioritize traffic based on any values within the headers and data
packets.
For detailed information about DLSw prioritization, refer to Chapter 6, “Using
DLSw Prioritization.”
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