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85 lines
2.2 KiB
Plaintext
85 lines
2.2 KiB
Plaintext
DEBUG HINTS
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- Check the source is issuing multicast packets with TTL high enough
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to reach the recipients.
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- Check the multicast packets are not being dropped due to
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fragmentation problems.
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- Three easy options to test IGMPv3 joins from the receiver host:
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1) Configure pimd on the receiver host with "ip igmp join":
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interface eth0
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ip pim ssm
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ip igmp join 239.1.1.1 1.1.1.1
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2) Use test_igmpv3_join command-line utility (provided with qpimd):
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test_igmpv3_join eth0 239.1.1.1 1.1.1.1
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3) User the Stig Venaas' ssmping utility:
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ssmping -I eth0 1.1.1.1
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To see multicast responses with ssmping, you will need run on
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the host 1.1.1.1 either:
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a) Stig Venaas' ssmpingd command-line daemon
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OR
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b) qpimd built-in ssmpingd service:
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conf t
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ip ssmpingd 1.1.1.1
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- Using nepim to generate multicast stream from 1.1.1.1 to 239.1.1.1:
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Notices:
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a) The host unicast address 1.1.1.1 must be reachable from the
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receiver.
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b) nepim tool requires the receiver must be started *before* the
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sender.
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First: Start a receiver for that stream by running:
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nepim -q -6 -j 1.1.1.1+239.1.1.1@eth0
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(Remember of enabling both "ip pim ssm" and "ip igmp" under eth0.)
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Second: Start the sender at host 1.1.1.1.
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The following command generates a 100-kbps multicast stream for
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channel 1.1.1.1,239.1.1.1 with TTL 10 and 1000-byte payload per UDP
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packet (to avoid fragmentation):
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nepim -6 -M -b 1.1.1.1 -c 239.1.1.1 -T 10 -W 1000 -r 100k -a 1d
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SAMPLE DEBUG COMMANDS
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conf t
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int eth0
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ip pim ssm
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test pim receive hello eth0 192.168.0.2 600 10 111 1000 3000 0
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test pim receive join eth0 600 192.168.0.1 192.168.0.2 239.1.1.1 1.1.1.1
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show ip pim join
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INTEROPERABILITY WITH CISCO
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! Cisco IP Multicast command reference:
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! ftp://ftpeng.cisco.com/ipmulticast/Multicast-Commands
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!
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ip pim ssm default ! enable SSM mode for groups 232.0.0.0/8
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ip multicast-routing
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ip pim state-refresh disable
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no ip pim dm-fallback
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!
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interface FastEthernet0
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ip pim sparse-mode
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ip igmp version 3
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-x-
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