[zebra 22904] Re: can't setsockopt IP_ADD_MEMBERSHIP No buffer space available

If you have lots of interfaces, you may be hitting the limit on group 
memberships.
You can increase it with:

sysctl -w net.ipv4.igmp_max_memberships=X

where "X" is something bigger than it is now (printing with "sysctl 
net.ipv4.igmp_max_memberships")

                                +-DLS