ping: sendto: No buffer space available

[Eugen Konkov]

Здравствуйте, Rudy.

check routing table and show which IP you ping.

Вы писали 24 сентября 2012 г., 19:20:28:


Rb> Sometimes when I try to ping a neighbor machine (plugged directly in 
Rb> with no switch involved), I get:

Rb> ping: sendto: No buffer space available
Rb> ping: sendto: No buffer space available

Rb> If I reset the interface  'ifconfig em1 down; ifconfig em1 up' the 
Rb> problem goes away.

Rb> The pings are:
Rb>   FreeBSD 8.3  em1   --> FreeBSD 9.0  em2
Rb> and I am seeing the issue on the FreeBSD 8.3 machine.  The box has 6GB
Rb> of free ram and is a quagga router.

Rb> What do I need to tune?

Rb> Thanks!

Rb> Rudy




Rb> # netstat -m
Rb> 10236/8454/18690 mbufs in use (current/cache/total)
Rb> 10234/5388/15622/262144 mbuf clusters in use (current/cache/total/max)
Rb> 10234/5382 mbuf+clusters out of packet secondary zone in use (current/cache)
Rb> 0/327/327/12800 4k (page size) jumbo clusters in use 
Rb> (current/cache/total/max)
Rb> 0/3070/3070/6400 9k jumbo clusters in use (current/cache/total/max)
Rb> 0/0/0/3200 16k jumbo clusters in use (current/cache/total/max)
Rb> 23027K/41827K/64854K bytes allocated to network (current/cache/total)
Rb> 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters)
Rb> 0/0/0 requests for jumbo clusters denied (4k/9k/16k)
Rb> 0/0/0 sfbufs in use (current/peak/max)
Rb> 0 requests for sfbufs denied
Rb> 0 requests for sfbufs delayed
Rb> 0 requests for I/O initiated by sendfile
Rb> 0 calls to protocol drain routines

Rb> # ifconfig em1
Rb> em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
Rb> options=4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC,VLAN_HWTSO>
Rb>          ether 00:25:90:56:60:7f
Rb>          inet 10.1.1.1 netmask 0xfffffffc broadcast 10.1.1.3
Rb>          media: Ethernet autoselect (1000baseT <full-duplex>)
Rb>          status: active



Rb> FreeBSD 8.3
Rb> ### loader.conf:
Rb> net.link.ifqmaxlen=1024
Rb> hw.em.rxd=1024
Rb> hw.em.txd=1024


Rb> ### sysctl.conf:
Rb> kern.timecounter.hardware=HPET

Rb> net.route.netisr_maxqlen=2048
Rb> net.inet.ip.intr_queue_maxlen=1024

Rb> kern.ipc.somaxconn=256
Rb> kern.random.sys.harvest.interrupt=0
Rb> kern.random.sys.harvest.ethernet=0

Rb> net.inet.raw.maxdgram=16384
Rb> net.inet.raw.recvspace=16384

Rb> net.inet.icmp.icmplim=1000
Rb> net.inet.ip.fastforwarding=1
Rb> kern.ipc.nmbclusters=262144
Rb> net.inet.icmp.drop_redirect=1

Rb> dev.em.0.rx_processing_limit=200
Rb> dev.em.1.rx_processing_limit=200
Rb> dev.em.2.rx_processing_limit=200
Rb> dev.em.3.rx_processing_limit=200

Rb> net.link.ether.inet.max_age=300
Rb> hw.intr_storm_threshold=9000

Rb> # Security
Rb> net.inet.ip.redirect=0
Rb> net.inet.ip.sourceroute=0
Rb> net.inet.ip.accept_sourceroute=0
Rb> net.inet.icmp.maskrepl=0




Rb> Not sure if it matters, but here are the tunings on the other box:

Rb> FreeBSD 9.0
Rb> ### loader.conf:
Rb> net.link.ifqmaxlen="512"

Rb> ### sysctl.conf:
Rb> net.inet.ip.fastforwarding=1
Rb> kern.ipc.nmbclusters=262144
Rb> kern.timecounter.hardware=HPET
Rb> net.inet.ip.rtminexpire=2
Rb> net.inet.ip.rtmaxcache=1024


Rb> dev.igb.0.rx_processing_limit=480
Rb> dev.igb.1.rx_processing_limit=480

Rb> net.inet.icmp.icmplim=1000
Rb> kern.random.sys.harvest.interrupt=0
Rb> kern.random.sys.harvest.ethernet=0

Rb> net.link.ether.inet.max_age=300

Rb> ##Sat Apr 21 00:06:48 PDT 2012
Rb> net.inet.ip.redirect=0
Rb> net.route.netisr_maxqlen=2048
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-- 
С уважением,
 Eugen                          mailto:kes-kes at yandex.ru