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2 Replies Latest reply: Jan 17, 2013 6:21 AM by Chuck1958 RSS

What is the eONS multicast IP address and should it be a pubic IP?

Chuck1958 Newbie
Currently Being Moderated
I've not been able to find much documentation on nodeaps. When I run this command...

srvctl config nodeapps

The output shows something called a "multicast IP address". What exactly is it for? Should it be a local (non-routable) IP address on my network, or should it be a public address?

Here is the output of the command. The last line is what bothers me...


VIP exists.:bisgora01
VIP exists.: /bisgora01-vip/10.128.99.52/255.255.255.128/Production
VIP exists.:bisgora02
VIP exists.: /bisgora02-vip/10.128.99.59/255.255.255.128/Production
GSD exists.
ONS daemon exists. Local port 6100, remote port 6200
eONS daemon exists. Multicast port 15429, multicast IP address 234.238.66.213, listening port 62040
  • 1. Re: What is the eONS multicast IP address and should it be a pubic IP?
    Sebastian Solbach (DBA Community) Guru
    Currently Being Moderated
    Hi,

    first of all eONS only exists in 11.2.0.1. It is removed in 11.2.0.2. so actually nothing to worry about.

    However GI itself uses multicast on the public and on the private interconnect.
    On public it is used by mdsnd to share the profile.xml if you change anything in the bootstack (like network parameters or ASM_DISKSTRING).
    On private it is used by mdsnd for the same (if there is a problem with multicast on the public) and in 11.2.0.2 for HAIP (redundant interconnect usage).

    Regards
    Sebastian
  • 2. Re: What is the eONS multicast IP address and should it be a pubic IP?
    Chuck1958 Newbie
    Currently Being Moderated
    My question is about what appears to be a public IP address for the "multicast" address. IOW it's not on the interconnect (192.168.x.x) nor is it an address on my corporate network (10.x.x.x). I thought 234.238.66.213 was a public IP address somewhere on the internet. I just discovered however that 234.x.x.x is a unicast address and as such is probably non-routable (still trying to confirm this). It guess it's something recent. The last time I checked on non-routable addresses they were as 10/8, 172.16/16, and 192.168/16. That was years ago though.

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