pimd/DEBUG

   1 DEBUG HINTS
   2
   3   - Check the source is issuing multicast packets with TTL high enough
   4     to reach the recipients.
   5
   6   - Check the multicast packets are not being dropped due to
   7     fragmentation problems.
   8
   9   - Three easy options to test IGMPv3 joins from the receiver host:
  10
  11     1) Configure pimd on the receiver host with "ip igmp join":
  12
  13        interface eth0
  14         ip pim ssm
  15         ip igmp join 239.1.1.1 1.1.1.1
  16
  17     2) Use test_igmpv3_join command-line utility (provided with qpimd):
  18
  19        test_igmpv3_join eth0 239.1.1.1 1.1.1.1
  20
  21     3) User the Stig Venaas' ssmping utility:
  22
  23        ssmping -I eth0 1.1.1.1
  24
  25        To see multicast responses with ssmping, you will need run on
  26        the host 1.1.1.1 either:
  27        a) Stig Venaas' ssmpingd command-line daemon
  28           OR
  29        b) qpimd built-in ssmpingd service:
  30           conf t
  31             ip ssmpingd 1.1.1.1
  32
  33   - Using nepim to generate multicast stream from 1.1.1.1 to 239.1.1.1:
  34
  35     Notices:
  36
  37     a) The host unicast address 1.1.1.1 must be reachable from the
  38     receiver.
  39
  40     b) nepim tool requires the receiver must be started *before* the
  41     sender.
  42
  43     First: Start a receiver for that stream by running:
  44
  45     nepim -q -6 -j 1.1.1.1+239.1.1.1@eth0
  46     (Remember of enabling both "ip pim ssm" and "ip igmp" under eth0.)
  47
  48     Second: Start the sender at host 1.1.1.1.
  49
  50     The following command generates a 100-kbps multicast stream for
  51     channel 1.1.1.1,239.1.1.1 with TTL 10 and 1000-byte payload per UDP
  52     packet (to avoid fragmentation):
  53
  54     nepim -6 -M -b 1.1.1.1 -c 239.1.1.1 -T 10 -W 1000 -r 100k -a 1d
  55
  56
  57
  58 SAMPLE DEBUG COMMANDS
  59
  60   conf t
  61    int eth0
  62     ip pim ssm
  63
  64   test pim receive hello eth0 192.168.0.2 600 10 111 1000 3000 0
  65   test pim receive join eth0 600 192.168.0.1 192.168.0.2 239.1.1.1 1.1.1.1
  66
  67   show ip pim join
  68
  69
  70 INTEROPERABILITY WITH CISCO
  71
  72   ! Cisco IP Multicast command reference:
  73   ! ftp://ftpeng.cisco.com/ipmulticast/Multicast-Commands
  74   !
  75   ip pim ssm default ! enable SSM mode for groups 232.0.0.0/8
  76   ip multicast-routing
  77   ip pim state-refresh disable
  78   no ip pim dm-fallback
  79   !
  80   interface FastEthernet0
  81    ip pim sparse-mode
  82    ip igmp version 3
  83
  84 -x-