connect: No buffer space available Oct 18 12:21:03 vps kernel: printk: 177 messages suppressed. Oct 18 12:21:03 vps kernel: Neighbour table overflow. -

connect: No buffer space available Oct 18 12:21:03 vps kernel: printk: 177 messages suppressed. Oct 18 12:21:03 vps kernel: Neighbour table overflow.

ping test.com
connect: No buffer space available

/var/log/messages


Oct 18 12:21:03 vps kernel: printk: 177 messages suppressed.
Oct 18 12:21:03 vps kernel: Neighbour table overflow.


Solution in /etc/sysctl.conf:


net.ipv4.neigh.default.gc_thresh1 = 4096
net.ipv4.neigh.default.gc_thresh2 = 8192
net.ipv4.neigh.default.gc_thresh3 = 8192
net.ipv4.neigh.default.base_reachable_time = 86400
net.ipv4.neigh.default.gc_stale_time = 86400

 

Edit the thresh1,2,3 to higher values if it keeps happening, usually heavy network traffic/torrents will cause this to happen.


  • How Do you Open/Extract .WARC Internet Archive Files on Linux Ubuntu/Mint/Centos?
  • How To Disable htaccess inheritance or exclude a directory
  • root/home directory has ownership changed to the wrong user/owner mysteriously
  • mdadm and lvm how to completely disable and remove vg/pv/lv
  • sshd[10470]: Authentication refused: bad ownership or modes for directory /root
  • LG Phoenix 2 Escape Disable AT&T Phonebook/Contacts Error Message
  • mdadm frozen and doesn't realize array is dead/missing failed due to unplugged drives
  • Unable to mount location Failed to retrieve share list from server: No such file or directory solution
  • mdadm how to make inactive array active
  • ImageMagick how to trim white space automatically in Linux
  • curl: (1) Protocol "https not supported or disabled in libcurl"
  • Centos 5 OpenSSL does not support TLS 1.2 Apache Error
  • DRBD Split-brain solution
  • How to Properly Secure SSL/TLS Apache Settings against Heartbleed Poodle (TLS) Poodle (SSLv3) FREAK BEAST CRIME
  • K9 Mail Android Cannot See or View E-mails Disappear after reading - with Dovecot server. Solution
  • The folder contents could not be displayed connection refused - solution
  • Setting Up System for First Use... Please Wait... - WHMCS Installer
  • ERROR 2013 (HY000): Lost connection to MySQL server during query
  • if script bash check if socket file (mysql.sock) exists
  • ioncube loader install howto on PHP/Centos