MONDO@EGFRCUVX.BITNET (KHALED A. HADI) (03/26/91)
Hi...
I have 2 questions regarding the use of EARN/BITNET line
to do IP (INTERNET connection).
A friend told me that I need a Datacompressors and Cisco.
Well I'd appreciate some information on the above equip. and software
needed like Vendors, addresses, ..... etc
|-----| |------|
IP CISCO--9.6-| Data| |Data | --9.6 IP--- CISCO
|compressor ------9.6 ----------|Compressor
NJE/BSC EARN--9.6-| | | | --9.6 BSC - EARN
|-----| |------|
The second question is it possible to use SNA instead of that BSC
together with the IP since we have plans to go SNA instead of
BSC due to the poor performance of that BSC.
*We are using VAX 11/780 and DMF32 synch-port
VMS 5.3 and Jnet 3.4 + PMDF 3.1
Thanks in advance.
Khaled A. Hadi
MONDO@EGFRCUVX.BITNET
---------------------
Supreme Council of Univ.,
Foreign Relations Coordination Unit,
Computer Center,
Cairo Univ., Giza, Egypt.
TEL: 202+735405
FAX: 202+728174Daniel.Karrenberg@cwi.nl (Daniel Karrenberg) (03/26/91)
Khaled, it might be worthwhile to consider running NJE (EARN) over IP in your case. I do not know if your EARN host can be upgraded to do this easily (and cheaply). If it can be done this would be much easier to manage in my opinion. Daniel
kla@kampi.hut.fi (Kimmo Laaksonen) (03/27/91)
In article <33651@boulder.Colorado.EDU> Daniel.Karrenberg@cwi.nl (Daniel Karrenberg) writes: > it might be worthwhile to consider running NJE (EARN) over IP in your case. > I do not know if your EARN host can be upgraded to do this easily > (and cheaply). If it can be done this would be much easier to manage > in my opinion. I don't know either, but most things are easier on the VAX Khaled has. Maybe JNET can be configured to use IP as "transport". Additional hardware & software needed are an Ethernet-interface card for the VAX (unless you already have that) & some TCP/IP package JNET runs with (commercial/non-commercial = expensive/cheap). Another solution I know JNET supports is NJE over DECNET. cisco can route DECNET, too (& many other protocols), simultaneously with IP. The NORDUNet backbone uses this method for EARN (NJE) traffic (with Nordic DECNET + SPAN/HEPNET as well, but that's plain DECNET). For this you'll need an Ethernet-interface in the VAX, too, and DECNET from DEC (even the cheapest end node version will do, with loss of some information, like the list of currently reachable DECNET nodes, but you'll get the same information out of the cisco router). If you can adopt either of these strategies, you don't need the Data Compressor. In the pure IP solution both NJE over IP and the other IP traffic share the same physical link between the ciscos. In the NJE over DECNET solution the ciscos will do the link sharing between IP and DECNET. However, it all depends on what's on the other side. If your current remote partner is a "real" IBM, your only solution is the device what you call a Data Compressor, because both BSC (or SNA (SDLC)) and cisco need their private channels, just like both had their own private lines. For BSC (or even SNA) 4800 bps (if you split your current "channel" half & half) is reasonable, but for IP it might be too little. My advice is to first ask your local telecom, if they can just change the modems. There are synchronous modems in the market (sorry, can't tell you any names) that support this kind of "channel splitting". However, I would also consider upgrading the modems, too, maybe to 64 Kbps (splitted 8 - 9.6 Kbps for the EARN BSC (SNA(SDLC)) link, and the rest for IP between the ciscos). ------------------------------------------------------------------------ Kimmo Laaksonen Internet: kla@hut.fi Helsinki University of Technology uucp: ..!mcsun!tut!santra!kla Computing Centre BITNET: KLA@FINGATE Otakaari 1, SF-02150 Espoo, Finland phone: int'l 358 0 451 4308