[Info-vax] DECserver/LAT across DECnet areas?

[Johnny Billquist]

On 2023-07-23 13:03, Scott Dorsey wrote:
> =?UTF-8?Q?Arne_Vajh=c3=b8j?=  <arne at vajhoej.dk> wrote:
>> On 7/22/2023 7:07 PM, Scott Dorsey wrote:
>>> LAT is not decnet.  Vaxcluster isn't decnet either.  LAT is its own protocol,
>>
>> Yes.
>> 0800 IPv4
>> 0806 ARP
>> 6001 MOP load
>> 6003 DECnet
>> 6004 LAT
>> 6007 SCA/LAVC
> 
> This is culturally very different than modern systems where everything is
> running IP and only what is on top of TCP or UDP is different.  In the
> early era of Ethernet, all kinds of different packet types could be found
> over the same Ethernet segment.  How they travelled from segment to segment
> (or didn't) varied depending on the environment and the protocol.  It was
> not unusual to find multiple buildings networked together with IP routers
> but which also had Appletalk routers running in parallel with the IP routers
> to carry Appletalk traffic as well as IP traffic.

Well. Not entirely true, but sortof. You still have (obviously) both ARP 
and IP (v4). But you also have things like RARP, IPv6, various VLAN 
stuff, MPLS, PTP, RDMA, and some other stuff.

So it's not like "it's all just IP".

   Johnny