4 Replies Latest reply on Nov 25, 2013 9:38 AM by rhusar

Question about multicast.address

jeryma Nov 20, 2013 4:21 AM

I use two virtual hosts which is created on vmware sphere . two vitual hosts ip can ping each other and firewall are all disabled.

But I set cluster infinispan on this two virtual hosts. but these two infinispan server can't connect each other by multicast.address.

what sholud I do with my virtual hosts or vmware sphere?

1. Re: Question about multicast.address

wdfink Nov 20, 2013 10:58 AM (in response to jeryma)

I'm not sure whether such vm blocks mcast addresses, if you use different sub-network the mcasts might be supressed.
You can use a JGroups test TestingJBoss to check the multicast between vm and host system and the two vm's
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2. Re: Question about multicast.address

rhusar Nov 20, 2013 11:14 AM (in response to wdfink)

+1

I think you need to refer to the VM manual to see how to enable multicast forwarding (and set routing and add filewall rule, etc). I also use tool called iptraf to quickly see if any multicast traffic is coming in.
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3. Re: Question about multicast.address

jeryma Nov 21, 2013 10:50 PM (in response to jeryma)

Hi，I still confuse about my multicast which it doesn't work .
netstat -gn:
IPv6/IPv4 Group Memberships
Interface       RefCnt Group
--------------- ------ ---------------------
lo              1      224.0.0.1
eth0            1      224.0.0.251
eth0            1      224.0.0.1
lo              1      ff02::1
eth0            1      ff02::fb
eth0            1      ff02::1:ff92:f58
eth0            1      ff02::1

ifconfig:
eth0      Link encap:Ethernet HWaddr 00:50:56:92:0F:58
          inet addr:10.19.222.51 Bcast:10.19.222.255 Mask:255.255.255.0
          inet6 addr: fe80::250:56ff:fe92:f58/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:60940441 errors:0 dropped:0 overruns:0 frame:0
          TX packets:50339425 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4473947703 (4.1 GiB) TX bytes:3143536495 (2.9 GiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:42419 errors:0 dropped:0 overruns:0 frame:0
          TX packets:42419 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:2121000 (2.0 MiB) TX bytes:2121000 (2.0 MiB)

----------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------

another machine netstat -gn:
lo              1      224.0.75.75
lo              1      224.0.0.1
eth0            1      224.0.75.75
eth0            1      228.8.8.8
eth0            1      224.0.0.251
eth0            1      224.0.0.1
lo              1      ff02::1
eth0            1      ff02::fb
eth0            1      ff02::1:ff92:f57
eth0            1      ff02::1

ifconfig:

eth0      Link encap:Ethernet HWaddr 00:50:56:92:0F:57
          inet addr:10.19.222.50 Bcast:10.19.222.255 Mask:255.255.255.0
          inet6 addr: fe80::250:56ff:fe92:f57/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:266661390 errors:0 dropped:0 overruns:0 frame:0
          TX packets:216892654 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:204846907912 (190.7 GiB) TX bytes:156641566435 (145.8 GiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:54211 errors:0 dropped:0 overruns:0 frame:0
          TX packets:54211 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:6290806 (5.9 MiB) TX bytes:6290806 (5.9 MiB)

firewall are all disabled.
what should I do?
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4. Re: Re: Question about multicast.address

rhusar Nov 25, 2013 9:38 AM (in response to jeryma)
Are you binding to IPv6? The loopback doesn't forward multicast.

Try this:
sudo route -A inet6 add FF01::1 dev lo

Also double check you run:
sudo service ip6tables stop

(maybe Non-definitive guide to Clustering AS7 over IPv6 might help a bit)
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