DECnet copy takes hours, FTP takes minutes

[Piet Timmers_1]

When I do TCPIP SHOW DEV/PORT=399 (or 102) I only get result on the local node. On two other nodes in the network I have no result.

I have done a little test, using 3 nodes, node-1, the local node, and node-2 and node-3 as remote nodes. In the original situation, it takes a very long time to copy a file from node-1 to node-2, but see my test results:

Copy from to

node-1 -> node-2 332 seconds
node-1 -> node-3 9 seconds

Node-2 -> node-1 3 seconds
node-2 -> node-3 10 seconds

Node-3 -> node-1 10 seconds
Node-3 -> node-2 9 seconds

As extra I dit not a normal copy, but a "GET", so on node-2 get the file from node-1. Time 86 seconds.

Still a lot of questions.

[Volker Halle]

Piet,

the fact that there is no session to TCPIP ports 399 or 102 on the remote node, while your DTSEND session is running, proves that you're running DECnet-OSI TP4 transport. This is also in line with the 'bad performance' behaviour due to lost PDUs.

Please consider to think of this problem as 'lost packets' instead of 'bad performance'.

You need to find the DECnet-OSI routing path from your local node (node-1) to the remote nodes (node-2 and node-3 for comparison).

Does MC NCL SHOW ROUTING CIRC ADJ * ALL see any DECnet routers (on either node-1, -2 or -3) ?

If this is a plain extended (bridged) LAN, you could do MOP loopback tests. If it's not, we need to take into account any routers in the path as well.

You could try to create an ASCII diagram of your network and add it as an attached .TXT file - use pseudo node names.

Volker.

[Volker Halle]

Piet,

if you make any progress or are able to solve this problem, could you please describe (in generic terms) what you've found to be the problem.

Thanks,

Volker.

[Piet Timmers_1]

For everybody; the moment I can solve this problem I will make a message here with what I have done.

Piet

[Piet Timmers_1]

It is a sad day.

Our node with networking problems is rebooted due to external cause.

The sad thing is that the problem is gone!!

With DTSend I now get a "normal" result, just like the other nodes.

So, I still do not know what caused the problem, but it is now very difficult to find out.

Sorry, I have to close this thread.
Thanks for everybody helping me to solve the problem.

Piet