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O/S Deployment Thread, FOG server has stopped multicasting in Technical; We have been successfully running a FOG server under Fedora 10, and finding it most useful to be able to ...
  1. #1

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    FOG server has stopped multicasting

    We have been successfully running a FOG server under Fedora 10, and finding it most useful to be able to multicast an image to a suite of PC's

    Recently, FOG has stopped multi-casting, although it will still work fine in uni-cast mode.

    We have made no changes to our netowrk infrastructure as far as I can see.

    Has anyone any sggestions as to why this has occured

    Cheers

    Iain

  2. #2

    Geoff's Avatar
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    Run the following command:

    Code:
    cat /proc/net/igmp
    and post the output.

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    Code:
    Idx     Device    : Count Querier       Group    Users Timer    Reporter
    
    1       lo        :     0      V3
    
                                    010000E0     1 0:00000000               0
    
    2       eth0      :     4      V2
    
                                    FB0000E0     1 0:00000000               0
    
                                    010000E0     1 0:00000000               0
    Does that tell you much?

  4. #4

    Geoff's Avatar
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    ok. What happens when you do:

    Code:
    ping -c1 224.0.0.1

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    I get 1 packet sent and 1 received. - strangely it's one of our photocopiers that has sent the reply

    Code:
    PING 224.0.0.1 (224.0.0.1) 56(84) bytes of data.
    64 bytes from 192.168.3.100: icmp_seq=1 ttl=255 time=0.308 ms
    
    --- 224.0.0.1 ping statistics ---
    1 packets transmitted, 1 received, 0% packet loss, time 0ms
    rtt min/avg/max/mdev = 0.308/0.308/0.308/0.000 ms
    Last edited by imunro01; 4th August 2009 at 08:14 AM.

  6. #6

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    Ok, can you run that command again and change the count to two? Late nights cause typos :P

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    Code:
    PING 224.0.0.1 (224.0.0.1) 56(84) bytes of data.
    64 bytes from 192.168.3.100: icmp_seq=1 ttl=255 time=0.475 ms
    64 bytes from 192.168.3.122: icmp_seq=1 ttl=255 time=0.677 ms (DUP!)
    64 bytes from 192.168.3.126: icmp_seq=1 ttl=255 time=0.685 ms (DUP!)
    64 bytes from 192.168.3.121: icmp_seq=1 ttl=255 time=0.691 ms (DUP!)
    64 bytes from 192.168.3.124: icmp_seq=1 ttl=255 time=0.761 ms (DUP!)
    64 bytes from 192.168.3.125: icmp_seq=1 ttl=255 time=0.772 ms (DUP!)
    64 bytes from 192.168.3.123: icmp_seq=1 ttl=255 time=0.782 ms (DUP!)
    64 bytes from 192.168.3.109: icmp_seq=1 ttl=64 time=1.07 ms (DUP!)
    64 bytes from 192.168.3.113: icmp_seq=1 ttl=64 time=1.27 ms (DUP!)
    64 bytes from 192.168.3.119: icmp_seq=1 ttl=64 time=1.57 ms (DUP!)
    64 bytes from 192.168.3.4: icmp_seq=1 ttl=64 time=1.82 ms (DUP!)
    64 bytes from 192.168.3.80: icmp_seq=1 ttl=64 time=2.12 ms (DUP!)
    64 bytes from 192.168.3.14: icmp_seq=1 ttl=255 time=3.77 ms (DUP!)
    64 bytes from 192.168.3.107: icmp_seq=1 ttl=64 time=4.77 ms (DUP!)
    64 bytes from 192.168.3.22: icmp_seq=1 ttl=64 time=7.91 ms (DUP!)
    64 bytes from 192.168.3.4: icmp_seq=2 ttl=64 time=0.229 ms
    
    --- 224.0.0.1 ping statistics ---
    2 packets transmitted, 2 received, +14 duplicates, 0% packet loss, time 1001ms
    rtt min/avg/max/mdev = 0.229/1.838/7.915/1.971 ms

  8. #8

    Geoff's Avatar
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    Ok everything you got a ping back from is talking multicast. Check what switches they live on. This should hopefully narrow things down to one or more switches that are causing you problems.

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    Sorry to tag onto the end of this but my problem is relevant

    Ive now got most of my machines imaged using unicast (couldnt faff around with multicast for too long as they had to be done). Now that ive one ict suite left ive tried multicasting again.
    First problem was SQL password issues from the logs (reset root mysql pass and sorted that).
    I queued a multicast image for 30 pcs (all on the same HP switch, same HP PC/network card, igmp snooping enabled across all switches)

    They all boot from pxe, 'please wait' while they all prepare themselves, once all have got to this stage, 20 out of 30 PCs start on the next screen (the actual imaging) while the rest just stay on 'please wait'

    Ive ran through what Geoff suggested earlier and got the following:


    Code:
    root@hhfog:/opt/fog_0.27/bin# cat /proc/net/igmp
    Idx     Device    : Count Querier       Group    Users Timer    Reporter
    1       lo        :     1      V3
                                    010000E0     1 0:00000000               0
    2       eth0      :     1      V2
                                    010000E0     1 0:00000000               0
    
    root@hhfog:/opt/fog_0.27/bin# ping -c1 224.0.0.1
    PING 224.0.0.1 (224.0.0.1) 56(84) bytes of data.
    64 bytes from 192.168.250.10: icmp_seq=1 ttl=64 time=0.507 ms
    
    root@hhfog:/opt/fog_0.27/bin# ping -c2 224.0.0.1
    PING 224.0.0.1 (224.0.0.1) 56(84) bytes of data.
    64 bytes from 192.168.250.10: icmp_seq=1 ttl=64 time=0.283 ms
    64 bytes from 192.168.4.235: icmp_seq=1 ttl=255 time=0.379 ms (DUP!)
    64 bytes from 192.168.4.50: icmp_seq=1 ttl=64 time=0.463 ms (DUP!)
    64 bytes from 192.168.4.13: icmp_seq=1 ttl=64 time=0.524 ms (DUP!)
    64 bytes from 192.168.4.27: icmp_seq=1 ttl=64 time=0.617 ms (DUP!)
    64 bytes from 192.168.4.9: icmp_seq=1 ttl=64 time=0.621 ms (DUP!)
    64 bytes from 192.168.8.233: icmp_seq=1 ttl=64 time=0.784 ms (DUP!)
    64 bytes from 192.168.9.101: icmp_seq=1 ttl=64 time=1.03 ms (DUP!)
    64 bytes from 192.168.250.17: icmp_seq=1 ttl=64 time=1.11 ms (DUP!)
    64 bytes from 192.168.250.11: icmp_seq=1 ttl=64 time=1.12 ms (DUP!)
    64 bytes from 192.168.250.18: icmp_seq=1 ttl=64 time=1.12 ms (DUP!)
    64 bytes from 192.168.250.22: icmp_seq=1 ttl=64 time=1.12 ms (DUP!)
    64 bytes from 192.168.250.16: icmp_seq=1 ttl=64 time=1.15 ms (DUP!)
    64 bytes from 192.168.250.21: icmp_seq=1 ttl=64 time=1.15 ms (DUP!)
    64 bytes from 192.168.250.26: icmp_seq=1 ttl=64 time=1.16 ms (DUP!)
    64 bytes from 192.168.250.24: icmp_seq=1 ttl=64 time=1.19 ms (DUP!)
    64 bytes from 192.168.250.14: icmp_seq=1 ttl=64 time=1.20 ms (DUP!)
    64 bytes from 192.168.250.12: icmp_seq=1 ttl=64 time=1.34 ms (DUP!)
    64 bytes from 192.168.250.13: icmp_seq=1 ttl=64 time=1.36 ms (DUP!)
    64 bytes from 192.168.250.20: icmp_seq=1 ttl=64 time=1.60 ms (DUP!)
    64 bytes from 192.168.250.15: icmp_seq=1 ttl=64 time=1.84 ms (DUP!)
    64 bytes from 192.168.3.240: icmp_seq=1 ttl=64 time=6.93 ms (DUP!)
    64 bytes from 192.168.250.10: icmp_seq=2 ttl=64 time=0.252 ms
    
    --- 224.0.0.1 ping statistics ---
    2 packets transmitted, 2 received, +21 duplicates, 0% packet loss, time 1000ms
    rtt min/avg/max/mdev = 0.252/1.235/6.933/1.281 ms
    Subnet mask is 255.255.0.0
    192.168.4.x - all hp printers
    192.168.3.240 - hp printer
    192.168.8.233 - netgear wag102 wireless access point (have various ones of these around school, must be left on somewhere)
    192.168.9.101 - KCORP lifestyle wireless router (used as access point only)
    192.16.250.x - HP switches

    HP Printers have ipx/spx & appletalk turned off.

    Now its found these are replying, what am I supposed to do about it? or is this normal?

    Its also doing about 100MB/minute, where 10x unicast were doing about 700MB/minute (1gbit server)

    See multicast logs on next post (too long!)
    Last edited by Frazer; 20th August 2009 at 01:24 PM. Reason: changed '20 out of 30pcs' from 75%

  10. #10

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    multicast.log
    Code:
    root@hhfog:/opt/fog_0.27/bin# tail -n20 /opt/fog/log/multicast.log
    [08-20-09 12:51:22 pm]  * [08-20-09 12:51:22 pm] Checking if I am the group manager.
    [08-20-09 12:51:22 pm]  * [08-20-09 12:51:22 pm] I am the group manager.
    [08-20-09 12:51:32 pm]  * [08-20-09 12:51:32 pm] Checking if I am the group manager.
    [08-20-09 12:51:32 pm]  * [08-20-09 12:51:32 pm] I am the group manager.
    [08-20-09 12:51:42 pm]  * [08-20-09 12:51:42 pm] Checking if I am the group manager.
    [08-20-09 12:51:42 pm]  * [08-20-09 12:51:42 pm] I am the group manager.
    [08-20-09 12:51:52 pm]  * [08-20-09 12:51:52 pm] Checking if I am the group manager.
    [08-20-09 12:51:52 pm]  * [08-20-09 12:51:52 pm] I am the group manager.
    [08-20-09 12:52:02 pm]  * [08-20-09 12:52:02 pm] Checking if I am the group manager.
    [08-20-09 12:52:02 pm]  * [08-20-09 12:52:02 pm] I am the group manager.
    [08-20-09 12:52:12 pm]  * [08-20-09 12:52:12 pm] Checking if I am the group manager.
    [08-20-09 12:52:12 pm]  * [08-20-09 12:52:12 pm] I am the group manager.
    [08-20-09 12:52:22 pm]  * [08-20-09 12:52:22 pm] Checking if I am the group manager.
    [08-20-09 12:52:22 pm]  * [08-20-09 12:52:22 pm] I am the group manager.
    [08-20-09 12:52:32 pm]  * [08-20-09 12:52:32 pm] Checking if I am the group manager.
    [08-20-09 12:52:32 pm]  * [08-20-09 12:52:32 pm] I am the group manager.
    [08-20-09 12:52:42 pm]  * [08-20-09 12:52:42 pm] Checking if I am the group manager.
    [08-20-09 12:52:42 pm]  * [08-20-09 12:52:42 pm] I am the group manager.
    [08-20-09 12:52:52 pm]  * [08-20-09 12:52:52 pm] Checking if I am the group manager.
    [08-20-09 12:52:52 pm]  * [08-20-09 12:52:52 pm] I am the group manager.
    multicast.log.udpcast.2
    Code:
    At the start of imaging:
    
    root@hhfog:/opt/fog_0.27/bin# tail -n20 /opt/fog/log/multicast.log.udpcast.2
    New connection from 192.168.2.27  (#23) 00000009
    New connection from 192.168.2.28  (#24) 00000009
    New connection from 192.168.2.29  (#25) 00000009
    New connection from 192.168.2.30  (#26) 00000009
    New connection from 192.168.2.26  (#27) 00000009
    New connection from 192.168.2.16  (#28) 00000009
    New connection from 192.168.2.21  (#29) 00000009
    Starting transfer: 00000009
    Timeout notAnswered=[0,1,2,3,4,5,13,21,26,27] notReady=[0,1,2,3,4,5,13,21,26,27] nrAns=20 nrRead=20 nrPart=30 avg=96993
    Timeout notAnswered=[0,1,2,3,4,5,13,21,26,27] notReady=[0,1,2,3,4,5,13,21,26,27] nrAns=20 nrRead=20 nrPart=30 avg=96993
    Timeout notAnswered=[0,1,2,3,4,5,13,21,26,27] notReady=[0,1,2,3,4,5,13,21,26,27] nrAns=20 nrRead=20 nrPart=30 avg=96993
    Timeout notAnswered=[0,1,2,3,4,5,13,21,26,27] notReady=[0,1,2,3,4,5,13,21,26,27] nrAns=20 nrRead=20 nrPart=30 avg=96993
    Timeout notAnswered=[0,1,2,3,4,5,13,21,26,27] notReady=[0,1,2,3,4,5,13,21,26,27] nrAns=20 nrRead=20 nrPart=30 avg=96993
    Timeout notAnswered=[0,1,2,3,4,5,13,21,26,27] notReady=[0,1,2,3,4,5,13,21,26,27] nrAns=20 nrRead=20 nrPart=30 avg=96993
    Timeout notAnswered=[0,1,2,3,4,5,13,21,26,27] notReady=[0,1,2,3,4,5,13,21,26,27] nrAns=20 nrRead=20 nrPart=30 avg=96993
    Timeout notAnswered=[0,1,2,3,4,5,13,21,26,27] notReady=[0,1,2,3,4,5,13,21,26,27] nrAns=20 nrRead=20 nrPart=30 avg=96993
    Timeout notAnswered=[0,1,2,3,4,5,13,21,26,27] notReady=[0,1,2,3,4,5,13,21,26,27] nrAns=20 nrRead=20 nrPart=30 avg=96993
    Timeout notAnswered=[0,1,2,3,4,5,13,21,26,27] notReady=[0,1,2,3,4,5,13,21,26,27] nrAns=20 nrRead=20 nrPart=30 avg=96993
    Timeout notAnswered=[0,1,2,3,4,5,13,21,26,27] notReady=[0,1,2,3,4,5,13,21,26,27] nrAns=20 nrRead=20 nrPart=30 avg=96993
    Timeout notAnswered=[0,1,2,3,4,5,13,21,26,27] notReady=[0,1,2,3,4,5,13,21,26,27] nrAns=20 nrRead=20 nrPart=30 avg=96993
    
    20% into imaging while a few PCs did not start:
    
    root@hhfog:/opt/fog_0.27/bin# tail -n20 /opt/fog/log/multicast.log.udpcast.2
    bytes=  5 713 744 400 re-xmits=3739162 ( 95.2%) slice=0032  73 709 551 615 -  19
    Timeout notAnswered=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] notReady=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] nrAns=0 nrRead=0 nrPart=20 avg=87
    bytes=  5 713 790 992 re-xmits=3739198 ( 95.2%) slice=0032  73 709 551 615 -  24
    Timeout notAnswered=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] notReady=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] nrAns=0 nrRead=0 nrPart=20 avg=92
    bytes=  5 713 837 584 re-xmits=3739234 ( 95.2%) slice=0032  73 709 551 615 -  15
    Timeout notAnswered=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] notReady=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] nrAns=0 nrRead=0 nrPart=20 avg=93
    bytes=  5 713 930 768 re-xmits=3739311 ( 95.2%) slice=0032  73 709 551 615 -  15
    Timeout notAnswered=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] notReady=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] nrAns=0 nrRead=0 nrPart=20 avg=100
    bytes=  5 714 070 544 re-xmits=3739384 ( 95.2%) slice=0032  73 709 551 615 -  15
    Timeout notAnswered=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] notReady=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] nrAns=0 nrRead=0 nrPart=20 avg=95
    bytes=  5 714 117 136 re-xmits=3739420 ( 95.2%) slice=0032  73 709 551 615 -  20
    Timeout notAnswered=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] notReady=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] nrAns=0 nrRead=0 nrPart=20 avg=102
    bytes=  5 714 210 320 re-xmits=3739480 ( 95.2%) slice=0032  73 709 551 615 -   7
    Timeout notAnswered=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] notReady=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] nrAns=0 nrRead=0 nrPart=20 avg=94
    bytes=  5 714 256 912 re-xmits=3739512 ( 95.2%) slice=0032  73 709 551 615 -  24
    Timeout notAnswered=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] notReady=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] nrAns=0 nrRead=0 nrPart=20 avg=114
    bytes=  5 714 350 096 re-xmits=3739553 ( 95.2%) slice=0032  73 709 551 615 -  15
    Timeout notAnswered=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] notReady=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] nrAns=0 nrRead=0 nrPart=20 avg=103
    bytes=  5 714 396 688 re-xmits=3739589 ( 95.2%) slice=0032  73 709 551 615 -  23
    Timeout notAnswered=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] notReady=[6,7,8,9,10,11,12,14,15,16,17,18,19,20,22,23,24,25,28,29] nrAns=0 nrRead=0 nrPart=20 avg=97
    Maybe a mod could move this to OS Deployment?
    Last edited by Frazer; 20th August 2009 at 01:36 PM.

  11. #11

    Geoff's Avatar
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    moved!

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