18 Nov
2019
18 Nov
'19
8:42 a.m.
-----Original Message-----
From: cctalk <cctalk-bounces at classiccmp.org> On Behalf Of Grant Taylor via
cctalk
Sent: 18 November 2019 16:22
To: cctalk at classiccmp.org
Subject: Re: 3270 controller simulation
On 11/18/19 2:56 AM, Dave Wade via cctalk wrote:
Yes the second. So it only works with SNA .
Whilst not what you are looking for some one has
been working on
supporting CISCO SDLC encapsulation in Hercules.
Are they working on Cisco's SDLC line protocol and / or physical
(serial) interface?
So this allows real 3270's to connect to
Hercules from a 3174 with
only SDLC ports by going via a CISCO router with an SDLC port.
Or is this more like this:
[3270]---(coax)---[3174]===(SDLC)===[Cisco]---Ethernet---[Hercules]
In that the Cisco translates from the physical SDLC circuit to Ethernet and
maybe does a protocol conversion to send things into Hercules across standard
Ethernet? Meaning that the Cisco becomes a fancy remote SDLC interface that
Hercules communicates with?
I've been pontificating DLSw coming out of OS/390 running in Hercules / on my
P/390-E to a Cisco and leveraging DLSw support to connect SNA
(802.2 SNAP) to clients downstream.
This seems similar but is integrating an SDLC link to a 3174.
Yes its DLSw. Was demonstrated at the recent DEC Legacy event..
I wonder if
you could do the reverse. So go TN5250 into a Cisco and
then emerge as SDLC....
Hum. I thought the TN5250 (and TN3270) was the 5250 (3270) protocol over
TelNet. As such, I don't think a 5250 (3270) terminal can speak the TN5250
(TN3720) protocol at all. Instead, they need some sort of physical device that
they can connect to that will gateway from <whatever> physical w/ 5250 (3270)
protocol to any IP network with
TN5250 (TN3270).
So, do any Cisco devices have twinax (?) interfaces for 5250 (or coax for 3270)?
I know that older & larger Cisco gear has the
Channel Interface Processor that
can attach to Bus & Tag channels from a mainframe and convert from TN3270
(I presume TN5250) to the physical B&T interface and necessary protocols
there over for the mainframe. But that's decidedly going the opposite
direction.
Perhaps ~> hopefully I'm just ignorant of other solutions from Cisco, or anyone
else, that will do what is desired. I believe the *Remote* 3174 (et al.) is one of
these devices from IBM. IBM's "Enterprise Extender"
comes to mind too. But I don't know what sort of down stream equipment that
connects to.
This is where I miss the old IBM offerings cataloge
--
Grant. . . .
unix || die
Dave