HECnet September 2008

hecnet@lists.dfupdate.se

10 participants
44 discussions

by bqt＠softjar.se

Which all, in my eye, points to that klh10 decides to drop DECnet packets. Johnny Mark Abene wrote: I admit, the fact that LAT "just works" is very puzzling to me. Enabling debugging on dpni20 isn't very helpful, as I don't see evidence of anything failing. The thing just doesn't transmit any DECnet traffic over ethernet. I can SET HOST to my own machine, so I know at least in principle the protocol is up, however only locally. Johnny Billquist wrote: One important detail you left out Mark, is that LAT traffic is working fine from your klh10 machine. Do you see any of those multicast addresses? Otherwise I think that's a red herring. Since LAT works, we can really narrow things down quite a lot. Johnny Mark Abene skrev: So, as for my problem with Johnny's bridge, I discovered the write(2) to bridge 0 was failing because I was compiling and linking to an outdated libpcap. That was easily remedied and now I have DECnet traffic on my bridged-tap. Yay. However, the problem I detailed below is still plaguing me, and still after digging through klh10 source it remains a mystery. Apparently the DECnet multicast addresses are maintained in the emulated pdp10's memory, in a table called MCAT. This occurs in the dpni20's function eth_mcatset() which calls osn_ifmcset() in osdnet.c. Strangely, it thinks it's succeeding, and though the multicast addresses don't appear in "netstat -ani", a "vmstat -m | grep ether_multi" shows the in-use counter is incrementing each time, including when I add them manually with mtest. I highly suspect that the dpni20 driver is getting confused somewhere, since with the bridged-tap setup it maintains an internal "10-side" IP and MAC address which is not visible to the OS's interface table, and only manifests in the ARP table. Presently, klh10's "enaddr" command-line utility stopped giving errors on adding the requisite multicast addresses, but ether_multi is *not* incremented, and the warning enaddr: No EN addr in iftab for "tap0" is given, telling me that nothing is really happening. This is telling, since enaddr exercises the same functions in osdnet.c that the emulator itself uses. As a test I think I may try setting the dedicated interface to a real ethernet instead of the virtual tap, to see if I can resolve the multicast issues. At the moment this seems to be the show stopper. Mark Mark Abene wrote: I wanted to be doing a netstat -ani, (-g only shows multicast for ipv4/6), but the result is the same. None of the DECnet multicast addresses are being added, most notably (and absolutely necessary) are: ab:0:0:3:0:0 - type 6003 - for DECnet Phase IV end node Hello packets from each host, and ab:0:0:4:0:0 - type 6003 - for DECnet Phase IV router Hello packets from the router. I've tried adding these with both enaddr from KLH10 and FreeBSD's built-in "mtest", but both return errors. This seems to be a FreeBSD-specific problem which so far I'm unable to find the reason for. Mark Mark Abene wrote: Mark Abene wrote: I've actually made a new discovery... looking at "netstat -g", I'm seeing that none of the multicast addresses exist that DECnet uses and requires! This would explain why I don't see any DECnet traffic at all. I compiled KLH10's enaddr utility in an attempt to add the multicast addresses manually, and I get failures for all attempts... "SIOCADDMULTI failed - Can't assign requested address". My server's kernel wasn't built with multicast routing enabled, which is not a default. I'm wondering if this is the cause of the error. I'm going to do some further testing. Regards Mark Well I was mistaken about the multicast routing, that's only for doing DVMRP with mrouted (MBONE, etc). Local LAN multicast should work "out of the box" on FreeBSD. Still trying to track down why this is failing, since it's my primary candidate for DECnet not working...

15 years, 7 months

DECnet on KLH10

by phiber＠phiber.com

I admit, the fact that LAT "just works" is very puzzling to me. Enabling debugging on dpni20 isn't very helpful, as I don't see evidence of anything failing. The thing just doesn't transmit any DECnet traffic over ethernet. I can SET HOST to my own machine, so I know at least in principle the protocol is up, however only locally. Johnny Billquist wrote: One important detail you left out Mark, is that LAT traffic is working fine from your klh10 machine. Do you see any of those multicast addresses? Otherwise I think that's a red herring. Since LAT works, we can really narrow things down quite a lot. Johnny Mark Abene skrev: So, as for my problem with Johnny's bridge, I discovered the write(2) to bridge 0 was failing because I was compiling and linking to an outdated libpcap. That was easily remedied and now I have DECnet traffic on my bridged-tap. Yay. However, the problem I detailed below is still plaguing me, and still after digging through klh10 source it remains a mystery. Apparently the DECnet multicast addresses are maintained in the emulated pdp10's memory, in a table called MCAT. This occurs in the dpni20's function eth_mcatset() which calls osn_ifmcset() in osdnet.c. Strangely, it thinks it's succeeding, and though the multicast addresses don't appear in "netstat -ani", a "vmstat -m | grep ether_multi" shows the in-use counter is incrementing each time, including when I add them manually with mtest. I highly suspect that the dpni20 driver is getting confused somewhere, since with the bridged-tap setup it maintains an internal "10-side" IP and MAC address which is not visible to the OS's interface table, and only manifests in the ARP table. Presently, klh10's "enaddr" command-line utility stopped giving errors on adding the requisite multicast addresses, but ether_multi is *not* incremented, and the warning enaddr: No EN addr in iftab for "tap0" is given, telling me that nothing is really happening. This is telling, since enaddr exercises the same functions in osdnet.c that the emulator itself uses. As a test I think I may try setting the dedicated interface to a real ethernet instead of the virtual tap, to see if I can resolve the multicast issues. At the moment this seems to be the show stopper. Mark Mark Abene wrote: I wanted to be doing a netstat -ani, (-g only shows multicast for ipv4/6), but the result is the same. None of the DECnet multicast addresses are being added, most notably (and absolutely necessary) are: ab:0:0:3:0:0 - type 6003 - for DECnet Phase IV end node Hello packets from each host, and ab:0:0:4:0:0 - type 6003 - for DECnet Phase IV router Hello packets from the router. I've tried adding these with both enaddr from KLH10 and FreeBSD's built-in "mtest", but both return errors. This seems to be a FreeBSD-specific problem which so far I'm unable to find the reason for. Mark Mark Abene wrote: Mark Abene wrote: I've actually made a new discovery... looking at "netstat -g", I'm seeing that none of the multicast addresses exist that DECnet uses and requires! This would explain why I don't see any DECnet traffic at all. I compiled KLH10's enaddr utility in an attempt to add the multicast addresses manually, and I get failures for all attempts... "SIOCADDMULTI failed - Can't assign requested address". My server's kernel wasn't built with multicast routing enabled, which is not a default. I'm wondering if this is the cause of the error. I'm going to do some further testing. Regards Mark Well I was mistaken about the multicast routing, that's only for doing DVMRP with mrouted (MBONE, etc). Local LAN multicast should work "out of the box" on FreeBSD. Still trying to track down why this is failing, since it's my primary candidate for DECnet not working...

15 years, 7 months

DECnet on KLH10

by bqt＠softjar.se

One important detail you left out Mark, is that LAT traffic is working fine from your klh10 machine. Do you see any of those multicast addresses? Otherwise I think that's a red herring. Since LAT works, we can really narrow things down quite a lot. Johnny Mark Abene skrev: So, as for my problem with Johnny's bridge, I discovered the write(2) to bridge 0 was failing because I was compiling and linking to an outdated libpcap. That was easily remedied and now I have DECnet traffic on my bridged-tap. Yay. However, the problem I detailed below is still plaguing me, and still after digging through klh10 source it remains a mystery. Apparently the DECnet multicast addresses are maintained in the emulated pdp10's memory, in a table called MCAT. This occurs in the dpni20's function eth_mcatset() which calls osn_ifmcset() in osdnet.c. Strangely, it thinks it's succeeding, and though the multicast addresses don't appear in "netstat -ani", a "vmstat -m | grep ether_multi" shows the in-use counter is incrementing each time, including when I add them manually with mtest. I highly suspect that the dpni20 driver is getting confused somewhere, since with the bridged-tap setup it maintains an internal "10-side" IP and MAC address which is not visible to the OS's interface table, and only manifests in the ARP table. Presently, klh10's "enaddr" command-line utility stopped giving errors on adding the requisite multicast addresses, but ether_multi is *not* incremented, and the warning enaddr: No EN addr in iftab for "tap0" is given, telling me that nothing is really happening. This is telling, since enaddr exercises the same functions in osdnet.c that the emulator itself uses. As a test I think I may try setting the dedicated interface to a real ethernet instead of the virtual tap, to see if I can resolve the multicast issues. At the moment this seems to be the show stopper. Mark Mark Abene wrote: I wanted to be doing a netstat -ani, (-g only shows multicast for ipv4/6), but the result is the same. None of the DECnet multicast addresses are being added, most notably (and absolutely necessary) are: ab:0:0:3:0:0 - type 6003 - for DECnet Phase IV end node Hello packets from each host, and ab:0:0:4:0:0 - type 6003 - for DECnet Phase IV router Hello packets from the router. I've tried adding these with both enaddr from KLH10 and FreeBSD's built-in "mtest", but both return errors. This seems to be a FreeBSD-specific problem which so far I'm unable to find the reason for. Mark Mark Abene wrote: Mark Abene wrote: I've actually made a new discovery... looking at "netstat -g", I'm seeing that none of the multicast addresses exist that DECnet uses and requires! This would explain why I don't see any DECnet traffic at all. I compiled KLH10's enaddr utility in an attempt to add the multicast addresses manually, and I get failures for all attempts... "SIOCADDMULTI failed - Can't assign requested address". My server's kernel wasn't built with multicast routing enabled, which is not a default. I'm wondering if this is the cause of the error. I'm going to do some further testing. Regards Mark Well I was mistaken about the multicast routing, that's only for doing DVMRP with mrouted (MBONE, etc). Local LAN multicast should work "out of the box" on FreeBSD. Still trying to track down why this is failing, since it's my primary candidate for DECnet not working... -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

15 years, 7 months

DECnet on KLH10

by phiber＠phiber.com

So, as for my problem with Johnny's bridge, I discovered the write(2) to bridge 0 was failing because I was compiling and linking to an outdated libpcap. That was easily remedied and now I have DECnet traffic on my bridged-tap. Yay. However, the problem I detailed below is still plaguing me, and still after digging through klh10 source it remains a mystery. Apparently the DECnet multicast addresses are maintained in the emulated pdp10's memory, in a table called MCAT. This occurs in the dpni20's function eth_mcatset() which calls osn_ifmcset() in osdnet.c. Strangely, it thinks it's succeeding, and though the multicast addresses don't appear in "netstat -ani", a "vmstat -m | grep ether_multi" shows the in-use counter is incrementing each time, including when I add them manually with mtest. I highly suspect that the dpni20 driver is getting confused somewhere, since with the bridged-tap setup it maintains an internal "10-side" IP and MAC address which is not visible to the OS's interface table, and only manifests in the ARP table. Presently, klh10's "enaddr" command-line utility stopped giving errors on adding the requisite multicast addresses, but ether_multi is *not* incremented, and the warning enaddr: No EN addr in iftab for "tap0" is given, telling me that nothing is really happening. This is telling, since enaddr exercises the same functions in osdnet.c that the emulator itself uses. As a test I think I may try setting the dedicated interface to a real ethernet instead of the virtual tap, to see if I can resolve the multicast issues. At the moment this seems to be the show stopper. Mark Mark Abene wrote: I wanted to be doing a netstat -ani, (-g only shows multicast for ipv4/6), but the result is the same. None of the DECnet multicast addresses are being added, most notably (and absolutely necessary) are: ab:0:0:3:0:0 - type 6003 - for DECnet Phase IV end node Hello packets from each host, and ab:0:0:4:0:0 - type 6003 - for DECnet Phase IV router Hello packets from the router. I've tried adding these with both enaddr from KLH10 and FreeBSD's built-in "mtest", but both return errors. This seems to be a FreeBSD-specific problem which so far I'm unable to find the reason for. Mark Mark Abene wrote: Mark Abene wrote: I've actually made a new discovery... looking at "netstat -g", I'm seeing that none of the multicast addresses exist that DECnet uses and requires! This would explain why I don't see any DECnet traffic at all. I compiled KLH10's enaddr utility in an attempt to add the multicast addresses manually, and I get failures for all attempts... "SIOCADDMULTI failed - Can't assign requested address". My server's kernel wasn't built with multicast routing enabled, which is not a default. I'm wondering if this is the cause of the error. I'm going to do some further testing. Regards Mark Well I was mistaken about the multicast routing, that's only for doing DVMRP with mrouted (MBONE, etc). Local LAN multicast should work "out of the box" on FreeBSD. Still trying to track down why this is failing, since it's my primary candidate for DECnet not working...

15 years, 7 months

GORVAX MULTINET tunnel and CHIMPY's bridge are moving IPs soon

by bob＠jfcl.com

I'll be out today, but I'll change it for you when I get back tonight. Bob -----Original Message----- From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] On Behalf Of Sampsa Laine Sent: Saturday, September 13, 2008 3:43 AM To: hecnet at Update.UU.SE Subject: Re: [HECnet] GORVAX MULTINET tunnel and CHIMPY's bridge are moving IPs soon Argh, My DNS wasn't set up correctly so the IP addresses in my previous message were all wrong: - CHIMPY's bridge remains on 78.86.123.26 port 4711/UDP - GORVAX's MULTINET tunnel has been moved to 78.86.123.31, port 700/UDP Sampsa PS: The original address for GORVAX's MULTINET tunnel will work as well until I confirm everyone can connect to the new address. On 13 Sep 2008, at 11:36, Sampsa Laine wrote: Well it would impolite to just turn off the old tunnel wouldn't it, so I've left both port redirections on for now :) Can you try try to speak to GORVAX's new address in which case I can turn off the port forward on the old one. Sampsa On 13 Sep 2008, at 04:17, Bob Armstrong wrote: - GORVAX's tunnel will be on port 700/UDP on address 78.86.120.236 (gvax.sampsa.com). Are you sure? LEGATO appears to be talking to GORVAX now, on 78.86.123.26. Bob

15 years, 7 months

GORVAX MULTINET tunnel and CHIMPY's bridge are moving IPs soon

by sampsa＠mac.com

Argh, My DNS wasn't set up correctly so the IP addresses in my previous message were all wrong: - CHIMPY's bridge remains on 78.86.123.26 port 4711/UDP - GORVAX's MULTINET tunnel has been moved to 78.86.123.31, port 700/UDP Sampsa PS: The original address for GORVAX's MULTINET tunnel will work as well until I confirm everyone can connect to the new address. On 13 Sep 2008, at 11:36, Sampsa Laine wrote: Well it would impolite to just turn off the old tunnel wouldn't it, so I've left both port redirections on for now :) Can you try try to speak to GORVAX's new address in which case I can turn off the port forward on the old one. Sampsa On 13 Sep 2008, at 04:17, Bob Armstrong wrote: - GORVAX's tunnel will be on port 700/UDP on address 78.86.120.236 (gvax.sampsa.com). Are you sure? LEGATO appears to be talking to GORVAX now, on 78.86.123.26. Bob

15 years, 7 months

GORVAX MULTINET tunnel and CHIMPY's bridge are moving IPs soon

by sampsa＠mac.com

Well it would impolite to just turn off the old tunnel wouldn't it, so I've left both port redirections on for now :) Can you try try to speak to GORVAX's new address in which case I can turn off the port forward on the old one. Sampsa On 13 Sep 2008, at 04:17, Bob Armstrong wrote: - GORVAX's tunnel will be on port 700/UDP on address 78.86.120.236 (gvax.sampsa.com). Are you sure? LEGATO appears to be talking to GORVAX now, on 78.86.123.26. Bob

15 years, 7 months

GORVAX MULTINET tunnel and CHIMPY's bridge are moving IPs soon

by bob＠jfcl.com

- GORVAX's tunnel will be on port 700/UDP on address 78.86.120.236 (gvax.sampsa.com). Are you sure? LEGATO appears to be talking to GORVAX now, on 78.86.123.26. Bob

15 years, 7 months

GORVAX MULTINET tunnel and CHIMPY's bridge are moving IPs soon

by sampsa＠mac.com

Gentlemen, I've finally figured out how to make more use of my range of static IPs so GORVAX and CHIMPY will be changing IP addresses: - CHIMPY's bridge will be on port 4711/UDP on address 78.86.123.29 (chimpy.sampsa.com) - GORVAX's tunnel will be on port 700/UDP on address 78.86.120.236 (gvax.sampsa.com). Sorry about any inconvenience. Sampsa

15 years, 7 months

DECnet on KLH10

by phiber＠phiber.com

I wanted to be doing a netstat -ani, (-g only shows multicast for ipv4/6), but the result is the same. None of the DECnet multicast addresses are being added, most notably (and absolutely necessary) are: ab:0:0:3:0:0 - type 6003 - for DECnet Phase IV end node Hello packets from each host, and ab:0:0:4:0:0 - type 6003 - for DECnet Phase IV router Hello packets from the router. I've tried adding these with both enaddr from KLH10 and FreeBSD's built-in "mtest", but both return errors. This seems to be a FreeBSD-specific problem which so far I'm unable to find the reason for. Mark Mark Abene wrote: Mark Abene wrote: I've actually made a new discovery... looking at "netstat -g", I'm seeing that none of the multicast addresses exist that DECnet uses and requires! This would explain why I don't see any DECnet traffic at all. I compiled KLH10's enaddr utility in an attempt to add the multicast addresses manually, and I get failures for all attempts... "SIOCADDMULTI failed - Can't assign requested address". My server's kernel wasn't built with multicast routing enabled, which is not a default. I'm wondering if this is the cause of the error. I'm going to do some further testing. Regards Mark Well I was mistaken about the multicast routing, that's only for doing DVMRP with mrouted (MBONE, etc). Local LAN multicast should work "out of the box" on FreeBSD. Still trying to track down why this is failing, since it's my primary candidate for DECnet not working...

15 years, 7 months

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HECnet September 2008