Kbase 12212: LAN Fast Path with PROGRESS 6.2M and AS/400 can replace SNA
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
10/05/1998 |
|
LAN Fast Path with PROGRESS 6.2M and AS/400 can replace SNA
LAN Fast Path (LFP) is a new protocol for client/server communications
on the AS/400. It is an alternative to the SNA protocol that
PROGRESS/400 already supports.
LFP is supported by all PROGRESS clients enabled for the AS/400.
If you use LFP, you need: OS/400 V2R2, PROGRESS/400 v6.2M, and new
client software.
Compared to SNA, LFP with PROGRESS/400 significantly reduces the
amount of communications overhead created when doing client/server
computing against the AS/400. LFP consistently performs two to
two-and-a-half times faster (depending on the size of the CPU and the
type of application) than SNA. LFP is only available as a solution
for PROGRESS/400 users.
LFP eliminates the top five layers of the SNA Protocol Stack, thereby
reducing the number of protocol layers application data must pass
through from seven to only two. Standard SNA is utilized to monitor
the network connection for session termination.
Support for both LFP and the current SNA protocol begins with Version
6.2M of PROGRESS/400. A PROGRESS client can use one or both protocols.
However, the SNA protocol is still needed when:
- APPN Routing is required.
- Neither Token Ring nor Ethernet networks are supported.
- The number of database connections required exceeds the number
of Service Access Points supported by a particular client
operating system (for example, 9 for MS-Windows, 16 for OS/2).
- Non-IBM products are used to provide connectivity.
PROGRESS clients enabled for the AS/400 can be attached to
one or multiple AS/400's using the SNA and/or LFP communications
protocols. LFP supports both Token Ring (802.5) and Ethernet (802.3).
It requires Version 2 Release 2 (V2R2) of OS/400 and a number of
Program Temporary Fixes (PTFs) from IBM.
Progress Software Technical Support Note # 12212