Using Synchronous Pass-Through
to Consolidate Synchronous Traffic
Routers and high-speed WAN links have been used to create corporate
internetworks. These internetworks connect LANs and provide communica-
tion among any systems and nodes attached to the LANs. There are many
devices, however, such as SNA 3270 and 3770 terminals in most corporate
networks, that are not connected to the extended LAN internetworks.
Instead, these devices are typically connected to a parallel network. Parallel
networks are expensive both for monthly connection charges and for
network support.
Synchronous pass-through (also called sync pass-through) is a new feature
of HP router software versions 5.70 and later that allows synchronous traffic
(HDLC, SDLC, LAPB) to be consolidated with LAN-to-LAN traffic on
HP-router-based internetworks. This application note describes how sync
pass-through works and examines several sync pass-through applications.
Figure 1 shows an extended LAN internetwork where sync pass-through is
used to connect synchronous interactive and printing terminals. Multiple
IBM 3174 cluster controllers in a multi-drop configuration are connected to
an IBM 3745 at site A over the extended LAN. Similarly, at site B, an HP 3000
running SNA IMF and SNA NRJE is connected to the IBM 3745 at site A
using sync pass-through over the extended LAN. Using sync pass-through, a
point-to-point circuit can be defined to convey synchronous traffic from one
location to another in the extended LAN.
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Содержание 600 Series
Страница 1: ...Hewlett Packard Series 200 400 and 600 Routers HP Routing Services and Applications ...
Страница 4: ......
Страница 5: ...1 Product Notes ...
Страница 6: ...Features of HP Routers Architecture and Technology Branch Office Routing Product Notes 1 2 ...
Страница 38: ...Architecture and Technology Software Control Path Architecture 1 34 ...
Страница 52: ...Branch Office Routing Future Directions 1 48 ...
Страница 53: ...2 Routing Services Notes ...
Страница 106: ...Bridging Service Traffic Prioritization 2 54 ...
Страница 158: ...Novell IPX Routing Service NetBIOS Protocol Support 2 106 ...
Страница 194: ...Data Compression for WAN Links Conclusion 2 142 ...
Страница 195: ...3 Application Notes and Case Studies ...
Страница 224: ...Improving Network Availability Application Recovery 3 30 ...
Страница 234: ...ISDN Wide Area Network Design Dry Creek Joint Elem School District Performance 3 40 ...
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