DEC LAT

[steve maher]

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

[Andy Bustamante · Accepted solution]

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.

[Robert Gezelter]

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

[steve maher]

Hi Guys,

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

Steve

[Tim Hughes_3]

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