SNMP/No Bufferspace

[Larry Rosenman]

On 06/03/2019 12:23 pm, Eugene Grosbein wrote:
> 03.06.2019 22:56, Larry Rosenman wrote:
> 
>> I have a mrtg job that runs every 5 minutes on a FreeBSD-CURRENT box 
>> and gets this randomly:
>> 
>> SNMP Error:
>> send_query: No buffer space available
> 
> [skip]
> 
>> How can I debug this?
> 
> Your outgoing network interface stalls for some reason.
> Where is this traffic directed to? Some kind of VPN tunnel? Physical
> NIC that looses link?
> Some Wifi or mobile network?
> 
physical NIC on the same physical network (all Ubiquiti gear).


⌂66% [ler at borg.lerctr.org:~] $ ifconfig
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
	options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
	inet6 ::1 prefixlen 128
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
	inet 127.0.0.1 netmask 0xff000000
	groups: lo
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
bce0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 
0 mtu 1500
	options=c01bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,VLAN_HWTSO,LINKSTATE>
	ether a4:ba:db:29:66:95
	media: Ethernet autoselect (1000baseT <full-duplex>)
	status: active
	nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
bce1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=c01bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,VLAN_HWTSO,LINKSTATE>
	ether a4:ba:db:29:66:97
	media: Ethernet autoselect
	nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
bce2: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=c01bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,VLAN_HWTSO,LINKSTATE>
	ether a4:ba:db:29:66:99
	media: Ethernet autoselect
	nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
bce3: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=c01bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,VLAN_HWTSO,LINKSTATE>
	ether a4:ba:db:29:66:9b
	media: Ethernet autoselect
	nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 
1500
	ether 02:d7:b8:51:f2:00
	inet6 fe80::d7:b8ff:fe51:f200%bridge0 prefixlen 64 scopeid 0x6
	inet6 2600:1700:210:b180:d7:b8ff:fe51:f200 prefixlen 64 autoconf
	inet 192.168.200.4 netmask 0xfffffc00 broadcast 192.168.203.255
	id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
	maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
	root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
	member: bce0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
	        ifmaxaddr 0 port 2 priority 128 path cost 55
	groups: bridge
	nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
⌂68% [ler at borg.lerctr.org:~] $

bridge0 via bce0 to the "main-switch" . and all the
AP's,switches, etc.



-- 
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 214-642-9640                 E-Mail: ler at lerctr.org
US Mail: 5708 Sabbia Dr, Round Rock, TX 78665-2106