[HECnet] DECnet map, was Re: DECnet/Python

Fri Nov 5 10:22:27 PDT 2021

@Paul - found my post from 2019 - looks like I posted the Cisco Ping 
exchange to c.o.vms and made some folks grumpy: 
https://groups.google.com/g/comp.os.vms/c/8Yu7SNCu0es/m/dxS93LQDBgAJ

Here's the paste of that post:

It appears Cisco is sending out a "DNA NSP message: Link service message
(0x10)" to which the remote node is responding with "DNA NSP message:
Disconnect confirm (0x48)" with "Reason for disconnect: Unknown
(0x0029)", constituting one successful "Ping".

Can this exchange be done using the NCP command line on OpenVMS?

Ping source (Cisco Router) : 1.579 / AA-00-04-00-43-06
Ping target (OpenVMS/VAX 7.3): 29.100 / AA-00-04-00-64-74

----------------
Outgoing packet:
----------------
Frame 3: 116 bytes on wire (928 bits), 116 bytes captured (928 bits) on
interface 0
Interface id: 0 (vde-decnet-tap1)
Interface name: vde-decnet-tap1
Encapsulation type: Ethernet (1)
Arrival Time: Feb 21, 2019 17:39:27.947909852 UTC
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1550770767.947909852 seconds
[Time delta from previous captured frame: 0.626152916 seconds]
[Time delta from previous displayed frame: 0.626152916 seconds]
[Time since reference or first frame: 1.943204371 seconds]
Frame Number: 3
Frame Length: 116 bytes (928 bits)
Capture Length: 116 bytes (928 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ethertype:dec_dna]
Ethernet II, Src: DecLocal_00:43:06 (aa:00:04:00:43:06), Dst:
DecLocal_00:2f:06 (aa:00:04:00:2f:06)
Destination: DecLocal_00:2f:06 (aa:00:04:00:2f:06)
Address: DecLocal_00:2f:06 (aa:00:04:00:2f:06)
.... ..1. .... .... .... .... = LG bit: Locally administered
address (this is NOT the factory default)
.... ...0 .... .... .... .... = IG bit: Individual address
(unicast)
Source: DecLocal_00:43:06 (aa:00:04:00:43:06)
Address: DecLocal_00:43:06 (aa:00:04:00:43:06)
.... ..1. .... .... .... .... = LG bit: Locally administered
address (this is NOT the factory default)
.... ...0 .... .... .... .... = IG bit: Individual address
(unicast)
Type: DEC DNA Routing (0x6003)
DEC DNA Routing Protocol
Routing flags: 0x0e
.... .11. = Long data packet format: 0x3
.... 1... = Return to Sender Request: Yes
...0 .... = Packet on return trip: No
..0. .... = Intra-ethernet packet: No
.0.. .... = Discarded packet: No
Destination Address: DecLocal_00:64:74 (aa:00:04:00:64:74) (29.100)
Source Address: DecLocal_00:43:06 (aa:00:04:00:43:06) (1.579)
Next level 2 router: 0x00
Visit count: 0x01
Service class: 0x00
Protocol type: 0x00
DNA NSP message: Link service message (0x10)
Destination node: 0x7464
Source node: 0x0643
.... 0000 0000 0000 = Message number: 0
...0 .... .... .... = Delayed ACK allowed: No

---------------
Incoming packet
---------------
Frame 4: 60 bytes on wire (480 bits), 60 bytes captured (480 bits) on
interface 0
Interface id: 0 (vde-decnet-tap1)
Interface name: vde-decnet-tap1
Encapsulation type: Ethernet (1)
Arrival Time: Feb 21, 2019 17:39:28.069274170 UTC
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1550770768.069274170 seconds
[Time delta from previous captured frame: 0.121364318 seconds]
[Time delta from previous displayed frame: 0.121364318 seconds]
[Time since reference or first frame: 2.064568689 seconds]
Frame Number: 4
Frame Length: 60 bytes (480 bits)
Capture Length: 60 bytes (480 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ethertype:dec_dna]
Ethernet II, Src: DecLocal_00:2f:06 (aa:00:04:00:2f:06), Dst:
DecLocal_00:43:06 (aa:00:04:00:43:06)
Destination: DecLocal_00:43:06 (aa:00:04:00:43:06)
Address: DecLocal_00:43:06 (aa:00:04:00:43:06)
.... ..1. .... .... .... .... = LG bit: Locally administered
address (this is NOT the factory default)
.... ...0 .... .... .... .... = IG bit: Individual address
(unicast)
Source: DecLocal_00:2f:06 (aa:00:04:00:2f:06)
Address: DecLocal_00:2f:06 (aa:00:04:00:2f:06)
.... ..1. .... .... .... .... = LG bit: Locally administered
address (this is NOT the factory default)
.... ...0 .... .... .... .... = IG bit: Individual address
(unicast)
Type: DEC DNA Routing (0x6003)
DEC DNA Routing Protocol
Routing flags: 0x06
.... .11. = Long data packet format: 0x3
.... 0... = Return to Sender Request: No
...0 .... = Packet on return trip: No
..0. .... = Intra-ethernet packet: No
.0.. .... = Discarded packet: No
Destination Address: DecLocal_00:43:06 (aa:00:04:00:43:06) (1.579)
Source Address: DecLocal_00:64:74 (aa:00:04:00:64:74) (29.100)
Next level 2 router: 0x00
Visit count: 0x01
Service class: 0x00
Protocol type: 0x00
DNA NSP message: Disconnect confirm (0x48)
Destination node: 0x0643
Source node: 0x7464
Reason for disconnect: Unknown (0x0029)

On 11/5/21 1:12 PM, Paul Koning wrote:
>
>> On Nov 5, 2021, at 1:08 PM, Supratim Sanyal<supratim at riseup.net>  wrote:
>>
>> On 11/5/21 1:04 PM, Johnny Billquist wrote:
>>
>>> Probably the problem that Cisco equipment don't talk NICE. :-)
>>>
>> But they do respond to the peculiar Cisco "PING DECNET x.y" exchange, I owe Paul a wireshark of that exchange, will get on it!
> I hadn't thought of including that in the mapper, but you're right, that is a possible enhancement.
>
> 	paul
>
>
-- 
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