avahi error: IP_ADD_MEMBERSHIP failed: No buffer space available

avahi error: IP_ADD_MEMBERSHIP failed: No buffer space available

[Ben Greear]

This is an FC5 64-bit system with 1GB RAM and dual-core Opteron.
When I create a bunch of virtual interfaces, I see this in
/var/log/messages.  The kernel is 2.6.16.16 plus my hacks.

At first look, it doesn't appear I actually need the avahi tool, so
I'm just going to disable it.  But, I thought someone might
want to be aware of the problem...

May 30 11:01:37 x64-1u avahi-daemon[2022]: Joining mDNS multicast group on inter
face eth2#16.IPv4 with address 172.1.2.18.
May 30 11:01:37 x64-1u avahi-daemon[2022]: Registering new address record for 17
2.1.2.18 on eth2#16.
May 30 11:01:37 x64-1u avahi-daemon[2022]: New relevant interface eth2#17.IPv4 f
or mDNS.
May 30 11:01:37 x64-1u avahi-daemon[2022]: Joining mDNS multicast group on inter
face eth2#17.IPv4 with address 172.1.2.19.
May 30 11:01:37 x64-1u avahi-daemon[2022]: IP_ADD_MEMBERSHIP failed: No buffer s
pace available
May 30 11:01:37 x64-1u avahi-daemon[2022]: Registering new address record for 17
2.1.2.19 on eth2#17.
May 30 11:01:37 x64-1u avahi-daemon[2022]: New relevant interface eth2#18.IPv4 f
or mDNS.
May 30 11:01:37 x64-1u avahi-daemon[2022]: Joining mDNS multicast group on inter
face eth2#18.IPv4 with address 172.1.2.20.
May 30 11:01:37 x64-1u avahi-daemon[2022]: IP_ADD_MEMBERSHIP failed: No buffer s
pace available

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

Re: avahi error: IP_ADD_MEMBERSHIP failed: No buffer space available

[Stefan Rompf]

Am Dienstag 30 Mai 2006 20:07 schrieb Ben Greear:

> May 30 11:01:37 x64-1u avahi-daemon[2022]: Joining mDNS multicast group on
> inter face eth2#18.IPv4 with address 172.1.2.20.
> May 30 11:01:37 x64-1u avahi-daemon[2022]: IP_ADD_MEMBERSHIP failed: No
> buffer s pace available

there is a configurable limit of system wide multicast memberships. As you're 
the guy who creates gazillions of VLAN interfaces, you will surely hit it. 
Check /proc/sys/net/ipv4/igmp_max_memberships. (This is also relevant for 
people running OSPF over many VLANs).

Stefan