Date: Tue, 4 Jun 2019 01:09:39 +0700 From: Eugene Grosbein <eugen@grosbein.net> To: Larry Rosenman <ler@lerctr.org> Cc: Freebsd net <freebsd-net@freebsd.org>, owner-freebsd-net@freebsd.org Subject: Re: SNMP/No Bufferspace Message-ID: <feed38df-c85c-6643-8382-c12366576765@grosbein.net> In-Reply-To: <8dba5eaea800356d279eb81d7d8b2a30@lerctr.org> References: <fde5e5f1b69c85fd5c7a7ab12e3d7167@lerctr.org> <f2cdca32-2df1-7ad0-b5c1-cf3bc4905fa9@grosbein.net> <8dba5eaea800356d279eb81d7d8b2a30@lerctr.org>
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04.06.2019 0:49, Larry Rosenman wrote: > 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@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@borg.lerctr.org:~] $ > > bridge0 via bce0 to the "main-switch" . and all the > AP's,switches, etc. You should search system logs for possible link problems and check counters shown by "netstat -idnh" (errs/drop/coll). Also check counters by "netstat -m" for mbufs/mbuf clusters.
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