topic Re: DEC LAT in Operating System - OpenVMS

DEC LAT

steve maher — Wed, 16 Mar 2005 04:34:56 GMT

Hi,

I'm trying to analyse network traffic between a DEC repeater and a kilostream link without much luck.

The current setup is like this

DECSERVER 90m
| cat5
DECREPEATER
| cat5
DEC RouteAbout access E1
| x21
Kilsotream link

If we put a hub between the routeabout and the repeater we can't seem to sniff all the traffic with ethereal. All we get is a few spanning tree protocl messages (See attached, need ethereal to open).

We need a decent trace in order to work out if we can replace the kilostream with ADSL.

Any suggestions would be great on how to do this.

Thanks

Steve

Re: DEC LAT

Andy Bustamante — Wed, 16 Mar 2005 12:58:48 GMT

Ethereal doesn't support LAT capture and display. If you're using LAT as the network transport you won't be able to replace this circuit with an ADSL link, xDSL supports TCP/IP.

What you could do is bring up the xDSL link and migrate to TCP/IP protocols. You'll need TCP/IP (or the older UCX) on the VMS host.

Re: DEC LAT

Robert Gezelter — Wed, 16 Mar 2005 15:55:02 GMT

Steve,

I don't use Etherpeek, but I would check the Routeabout documentation carefully. Some protcol bridging products will only transfer some of the protcols present on the Ethernet link.

To be definitive, I would use a monitoring tool that captures bare packets (I carry around Etherpeek).

Hope that the above is helpful.

- Bob Gezelter, http://www.rlgsc.com

Re: DEC LAT

steve maher — Thu, 17 Mar 2005 03:41:24 GMT

Hi Guys,

I was afraid this was the case. Thanks for your help.

Steve

Re: DEC LAT

Tim Hughes_3 — Sun, 20 Mar 2005 18:33:44 GMT

LAT (Local Area Transport) is a broadcast protocol. It only operates on a local area network (Etherent/FDDI?). It is not routable.

There use to be a device called a TRANSLAN that would extend a LAN accross a WAN,

Tim