Linux/Unix

KVM + NIC Bonding

Posted on by Andy

If you want to know about NIC bonding combined with KVM usage, simply read the official KVM HOWTO. There are some known bugs with mode 0 and 6 (primarly used for load balancing), apparently the fix can be found on this page. For me to get the mode 1 (active-backup) working correctly i had to change the bonding config file as follows:

alias bond0 bonding
options bond0 miimon=100 mode=1 primary=eth0

and activate the STP protocol on the bridge. edit /etc/sysconfig/network-scripts/ifcfg-bridge0 and add

STP="on"

Broken pipe error on SSH session

Posted on by Andy

The "broken pipe" occurs when a SSH sessions times out. To resolve this you have 2 possibilities:

Server-Side (Linux):

  • open /etc/ssh/sshd_config
    # vim /etc/ssh/sshd_config
  • uncomment the lines:
    TCPKeepAlive Yes
    ClientAliveInterval 0 (change the 0 to 60, so every 60 seconds a keep alive packet is sent)
  • save the config
  • restart ssh server
    # service sshd restart

Client-Side (MacOSX/Linux):

  • open ~/.ssh/ssh_config (linux) or ~/.ssh/config (MacOSX)
  • add following lines:
    ServerAliveInterval 60 (send packet every 60 seconds)
  • save file