HECnet

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15559 discussions

by marc＠bluevine.net

Must be some problem with either of the nodes then, because normally the adjacency will come up, when the end node starts receiving the router hellos. Can you monitor the Ethernet with a protocol analyzer? You should see the hellos from both nodes. I think I can try this. The setup is a bit more complicated than I'd like. One more thing to check: you might have some equipment filtering multicast packets on the Ehternet. Like e.g. a routing switch. Also firewalls (software in a PC) might do that. I assume you run the Personal Alpha on a PC. It's Personal Alpha running on a virtualized Windows XP guest running on an ESXi host. In comparison, the VAX is running on a virtualized Ubuntu guest running on the same ESXi host. Since networking seems to be working on the VAX, I'm thinking that it has something to do with the way Personal Alpha does its networking. I wonder whether it's not getting some of the multicasts. --Marc

16 years, 2 months

Need help with DECnet routing

by uusimaki＠exdecfinland.org

Marc Chametzky wrote: Have you checked that node DUSTY is sending its router hello packets on the Ethernet circuit? Does node LULU receive the router hellos from node DUSTY? I do have "Hello timer = 15" on DUSTY. I do have connectivity between LULU and DUSTY, but now I wonder whether it's full connectivity. Perhaps there's a problem with Personal Alpha's network emulation. It may not be receiving all of the packets. What does node LULU indicate as the adjacency? It should be node DUSTY unless you have another Level 1 (with higher priority) or Level 2 router on the same circuit. When I do a "SHOW CIRC SVA-0 STAT" on LULU, I don't see any adjacent node. --Marc . Must be some problem with either of the nodes then, because normally the adjacency will come up, when the end node starts receiving the router hellos. Can you monitor the Ethernet with a protocol analyzer? You should see the hellos from both nodes. One more thing to check: you might have some equipment filtering multicast packets on the Ehternet. Like e.g. a routing switch. Also firewalls (software in a PC) might do that. I assume you run the Personal Alpha on a PC.

16 years, 2 months

Need help with DECnet routing

by marc＠bluevine.net

How are you trying to connect? Do you have an up-to-date node list on LULU? I did copy the node list from DUSTY so LULU can connect by name. --Marc

16 years, 2 months

Need help with DECnet routing

by marc＠bluevine.net

Have you checked that node DUSTY is sending its router hello packets on the Ethernet circuit? Does node LULU receive the router hellos from node DUSTY? I do have "Hello timer = 15" on DUSTY. I do have connectivity between LULU and DUSTY, but now I wonder whether it's full connectivity. Perhaps there's a problem with Personal Alpha's network emulation. It may not be receiving all of the packets. What does node LULU indicate as the adjacency? It should be node DUSTY unless you have another Level 1 (with higher priority) or Level 2 router on the same circuit. When I do a "SHOW CIRC SVA-0 STAT" on LULU, I don't see any adjacent node. --Marc

16 years, 2 months

Need help with DECnet routing

by marc＠bluevine.net

LULU, on the other hand, can only connect to DUSTY. It can't connect to LEGATO. Hmm. What makes you think this? I ask because LEGATO can connect to LULU (I just tried it a minute ago), so it is working at least one way. That is strange... I saw your connection attempt, but my attempts to contact LEGATO don't work as well: $ set host legato %SYSTEM-F-UNREACHABLE, remote node is not currently reachable When I look in NCP, I see something that doesn't look right. NCP>show node legato Node Volatile Summary as of 6-APR-2009 12:06:19 Node State Active Delay Circuit Next node Links 2.1 (LEGATO) SVA-0 0 I would expect that the next node should be 2.210 (DUSTY), but it doesn't know how to get there. --Marc

16 years, 2 months

Need help with DECnet routing

by uusimaki＠exdecfinland.org

Marc Chametzky wrote: I have my new system, LULU, up and it's connected via Ethernet on the same network segment as DUSTY. LULU is a non-routing end node. DUSTY is "TYPE ROUTING IV" and has two circuits, TCP-0-0 to LEGATO and QNA-0 for the local network. DUSTY has connectivity to both LEGATO (and the rest of HECnet) and also to LULU. LULU, on the other hand, can only connect to DUSTY. It can't connect to LEGATO. I thought that DUSTY, being a routing node, would route packets between its two circuits, but that appears not to be the case. I tried setting DUSTY up as an area router, thinking that making it a level 2 router would permit LULU's packets to go through DUSTY, but that didn't seem to work either. What should I do in order to get DUSTY to route the packets from LULU to the rest of HECnet? --Marc . Have you checked that node DUSTY is sending its router hello packets on the Ethernet circuit? Does node LULU receive the router hellos from node DUSTY? What does node LULU indicate as the adjacency? It should be node DUSTY unless you have another Level 1 (with higher priority) or Level 2 router on the same circuit.

16 years, 2 months

Need help with DECnet routing

by healyzh＠aracnet.com

How are you trying to connect? Do you have an up-to-date node list on LULU? SET HOST LEGATO or SET HOST 2.1 Zane On Mon, 6 Apr 2009, Marc Chametzky wrote: LULU, on the other hand, can only connect to DUSTY. It can't connect to LEGATO. Hmm. What makes you think this? I ask because LEGATO can connect to LULU (I just tried it a minute ago), so it is working at least one way. That is strange... I saw your connection attempt, but my attempts to contact LEGATO don't work as well: $ set host legato %SYSTEM-F-UNREACHABLE, remote node is not currently reachable When I look in NCP, I see something that doesn't look right. NCP>show node legato Node Volatile Summary as of 6-APR-2009 12:06:19 Node State Active Delay Circuit Next node Links 2.1 (LEGATO) SVA-0 0 I would expect that the next node should be 2.210 (DUSTY), but it doesn't know how to get there. --Marc

16 years, 2 months

Need help with DECnet routing

by bob＠jfcl.com

Marc Chametzky wrote DUSTY is "TYPE ROUTING IV" and has two circuits, TCP-0-0 to LEGATO and QNA-0 for the local network. DUSTY has connectivity to both LEGATO (and the rest of HECnet) and also to LULU. This is the way it should be. I tried setting DUSTY up as an area router, thinking that making it a level 2 router would permit LULU's packets to go through DUSTY, but that didn't seem to work either. An area router isn't necessary since all your nodes (and LEGATO too) are in the same area. LULU, on the other hand, can only connect to DUSTY. It can't connect to LEGATO. Hmm. What makes you think this? I ask because LEGATO can connect to LULU (I just tried it a minute ago), so it is working at least one way. Bob

16 years, 2 months

Need help with DECnet routing

by marc＠bluevine.net

I have my new system, LULU, up and it's connected via Ethernet on the same network segment as DUSTY. LULU is a non-routing end node. DUSTY is "TYPE ROUTING IV" and has two circuits, TCP-0-0 to LEGATO and QNA-0 for the local network. DUSTY has connectivity to both LEGATO (and the rest of HECnet) and also to LULU. LULU, on the other hand, can only connect to DUSTY. It can't connect to LEGATO. I thought that DUSTY, being a routing node, would route packets between its two circuits, but that appears not to be the case. I tried setting DUSTY up as an area router, thinking that making it a level 2 router would permit LULU's packets to go through DUSTY, but that didn't seem to work either. What should I do in order to get DUSTY to route the packets from LULU to the rest of HECnet? --Marc

16 years, 2 months

New service on CHIMPY - Emulated Altair Z80 running MP/M

by sampsa＠mac.com

Guys, just in case any of you fancy a play, I've installed MP/M II V2.1 on a SIMH Altair Z80 emulator. It's accessible through CHIMPY by logging in as ALTAIR. There are a number of floppy drives (write locked) and a hard drive (writeable) as follows: A: System Disk B: Multiplan C: VEDIT D: WordStar E: Games I: Writeable hard drive. Let me know how it's working!. Sampsa

16 years, 2 months

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