🚀 go-pugleaf

DECNET ethernet addresses ...

>>>We also hear rumours that AA-00-04-... machines may under some
>>>circumstances use AA-00-03-<same thing>.
>> 
>> I've never seen this - maybe a DEC expert knows?
> 
>   Who, me? Well, if you insist...
> 

Well, its not me, but I want to point you to rfc1060 if you are interested.

>   AA-00-03-... is the hardware address on the older DEC interfaces, such as
> the DEUNA. It is changed to AA-00-04-... when DECnet is started, just as on

Nearly. aa:00:03:... has been a global physical address. aa:00:04:... 
is the logical address for systems running DECNET. Today, there are only very 
few of those who have aa:00:03:... addresses - I didn't find any on our net.

> the other boards. I don't know why DEC changed to 08-00-2B-... when they came
> out with the newer interfaces. Perhaps people were being confused by the -03-
> vs. -04-?

To my knowledge, the 08:00:2b:... adresses are given to DEC Hardware not
running DECNET. All our Terminal Servers, for example, have such an address. 


It might be interesting to know that DEC has also aa:00:00 to aa:00:02
reserved, but the rfc claims these addresses to be obsolete. 
The address 08:00:58 is reserved for decsystem-20. So far, the hardware 
id addresses. Now, the multicast addresses: 

   Address                 type    explanation

   09-00-2B-00-00-00       6009?   DEC MUMPS?
   09-00-2B-00-00-01       8039?   DEC DSM/DTP?
   09-00-2B-00-00-02       803B?   DEC VAXELN?
   09-00-2B-00-00-03       8038    DEC Lanbridge Traffic Monitor (LTM)
   09-00-2B-00-00-04       ????    DEC MAP End System Hello?
   09-00-2B-00-00-05       ????    DEC MAP Intermediate System Hello?
   09-00-2B-00-00-06       803D?   DEC CSMA/CD Encryption?
   09-00-2B-00-00-07       8040?   DEC NetBios Emulator?
   09-00-2B-00-00-0F       6004    DEC Local Area Transport (LAT)
   09-00-2B-00-00-1x       ????    DEC Experimental
   09-00-2B-01-00-00       8038    DEC LanBridge Copy packets (All bridges)
   09-00-2B-01-00-01       8038    DEC LanBridge Hello packets (All local
                                       bridges)
                                       1 packet per second, sent by the
                                       designated LanBridge
   09-00-2B-02-00-00       ????    DEC DNA Level 2 Routing Layer routers?
   09-00-2B-02-01-00       803C?   DEC DNA Naming Service Advertisement?
   09-00-2B-02-01-01       803C?   DEC DNA Naming Service Solicitation?
   09-00-2B-02-01-02       803E?   DEC DNA Time Service?
   09-00-2B-03-xx-xx       ????    DEC default filtering by bridges?
   09-00-2B-04-00-00       8041?   DEC Local Area System Transport (LAST)?
   09-00-2B-23-00-00       803A?   DEC Argonaut Console?

   AB-00-00-01-00-00       6001    DEC Maintenance Operation Protocol (MOP)
                                   Dump/Load Assistance
   AB-00-00-02-00-00       6002    DEC Maintenance Operation Protocol (MOP)
                                   Remote Console
                                   1 System ID packet every 8-10 minutes,
                                   by every:
                                   DEC LanBridge
                                   DEC DEUNA interface
                                   DEC DELUA interface
                                   DEC DEQNA interface (in a certain mode)
   AB-00-00-03-00-00       6003    DECNET Phase IV end node Hello packets
                                   1 packet every 15 seconds, sent by
                                   each DECNET host
   AB-00-00-04-00-00       6003    DECNET Phase IV Router Hello packets
                                   1 packet every 15 seconds, sent by the
                                   DECNET router
   AB-00-00-05-00-00       ????    Reserved DEC 
   through
   AB-00-03-FF-FF-FF
   AB-00-03-00-00-00       6004    DEC Local Area Transport (LAT) - old
   AB-00-04-00-xx-xx       ????    Reserved DEC customer private use
   AB-00-04-01-xx-yy       6007    DEC Local Area VAX Cluster groups
                                   System Communication Architecture (SCA)



If you need to know even more than that, you should try to get hold of 
the FRC document I was citing above. The multicast addresses have been 
taken directly from there. 

Regards 
Reinhard