Original question at the bottom.
Got no reponses from the Tru64 Users Group. Had to go to Compaq.
Got the following response from Lee Parker:
-----------------------------
About once every 8 to 12 minutes, DLI sends a MOP_SYSID message
onto the wire, so bridges know where the machine is. Other than
that, they are not used. Input packets are dropped at the ethernet
layer if no IP addresses are configured, the rest of the packets
go to DLI where they are dropped. I suppose if there were lots of
broadcast packets on the LAN, then there could be some minor amount
of overhead having DLI deal with the dropped packets.. But in general,
it's not an overhead issue.
There's nothing that can be done to disable the sending of these
packets, short of removing the DLI option from the kernel (yes, it
is optional).
However, it appears that even when the DLI option has been removed
from the kernel, there are several other things that may try to
install it anyway. I just tried it on my v5 system and I believe
LAT requires it as well as the async port drivers.
-< yes, LAT requires DLI >-
------------------------------
Lee said he would file two change requests to engineering for a future mod
to the OS:
1) provide a method to turn off the MOP messages, tunable probably.
2) provide a method to restrict what device a nic can talk to.
THANKS LEE!
Jim
-----Original Message-----
From: Eiler, James A. [mailto:James.Eiler_at_alcoa.com]
Sent: Wednesday, January 31, 2001 6:56 PM
To: tru64-unix-managers_at_ornl. gov (E-mail)
Subject: How to stop Remote Console?
We've got a DS20 running v5.1. We've got one Network Interface Card talking
to our lan and another nic port direct connected to a device that we're
communicating with using TCP/IP protocol. The device is a slave - only
speaks when spoken to.
With a network "sniffer" we're able to see all of the packets going to/from
our slave device. On ten-minute intervals, we see a packet coming out of
the Alpha containing information as follows:
DEC_Console MOP RC ----- Maintenance Operation Remote Console Protocol
-------
We've disabled LAT to this port, so we know it isn't coming from that.
I've perused the archives and saw a posting from 06 Feb 1999, "Stopping DEC
Remote Console":
During a network audit, I discovered that we are still seeing
packets from Digital Unix machines (3.2C & 4.0D) for Ether Type=6002
(DEC Remote Console). These machines have lat unconfigured and
turned
off.
How do I turn of the remote console?
Looks like our problem exactly!
But the archives don't have the Summary to this question.
Anybody have any ideas?
Thanks.
Jim
Received on Wed Feb 07 2001 - 14:51:44 NZDT