On one of our asterisk systems that is quite busy, we are seeing the
following from ‘netstat -s’:
17725210 packets received
36547 packets to unknown port received.
44017 packet receive errors
17101174 packets sent
RcvbufErrors: 44017 <--- this
When this number increases, we see SIP errors, and in particular
Qualify packets are lost, and temporarily disable handsets, causing
all sorts of minor chaos.
I have already tuned from the defaults of:
net.core.rmem_max = 131071
net.core.wmem_max = 131071
net.core.rmem_default = 111616
net.core.wmem_default = 111616
net.core.optmem_max = 10240
net.core.netdev_max_backlog = 1000
net.core.rmem_max = 1048575
net.core.wmem_max = 1048575
net.core.rmem_default = 1048575
net.core.wmem_default = 1048575
net.core.optmem_max = 1048575
net.core.netdev_max_backlog = 10000
with no luck.
Any more suggestions?