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Linux - Networking This forum is for any issue related to networks or networking.
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Old 06-09-2009, 05:13 AM   #1
LQ Newbie
Registered: Apr 2004
Location: India
Distribution: RedHat
Posts: 29

Rep: Reputation: 15
multicasting is not working on RHEL5

hi friends,

I was able to achieve multicast transmission and reception on RHEL4 (Red Hat Enterprise Linux 4) but the same thing i am not able to do it on RHEL5. I have followed all the procedures that are required at the OS level as well as at API level. but i am not able to get multicasted packets on RHEL5 system.
What changes do I have to make in RHEL5... pls suggest your ideas. bye

Kumara Swamy.
Old 06-09-2009, 09:39 AM   #2
Registered: Aug 2003
Location: Seattle
Distribution: ubuntu, lately
Posts: 182
Blog Entries: 1

Rep: Reputation: 35
sounds like you don't know where to start looking

this is what I would do:

1) verify that the multicast datagrams are reaching the system. use tcpdump, tshark, wireshark, etc.
2) verify that the mcast application is listening correctly with 'netstat -anup' (run as root when using '-p' flag)
3) check firewall settings


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