Emulated node command exceptions

Almost all the commands that are available on a takeover node are available on an emulated node. Some commands, however, are either unavailable or behave differently in emulated mode.

Unavailable commands

The following commands are not available on an emulated node:

  • cf disable
  • cf enable
  • cf forcegiveback
  • cf forcetakeover
  • cf giveback
  • cf takeover
  • date
  • halt
  • ifconfig partner
  • ifconfig -partner
  • ifconfig mtusize
  • rdate
  • reboot
  • timezone

Commands with different behaviors

Command Difference in emulated mode
ifconfig interface
  • Displays emulated interface mappings based on the failed node's /etc/rc file rather than the takeover node interface mappings
  • Displays emulated interface names rather than the interface names of the takeover node
  • Displays only interfaces that have been configured, unlike the takeover node, which displays all interfaces, configured or not
mt Uses the tape devices on the takeover node because the failed node has no access to its tape devices
netstat -i Appends a plus sign (+) to shared interfaces

A shared interface is one that has two IP addresses assigned to it: an IP address for the node in which it physically resides and an IP address for its partner node in the HA pair

sysconfig Displays information only about the hardware that is attached to the takeover node

Does not display information about the hardware that is attached only to the failed node

For example, the disk adapter information that the partner sysconfig -r command displays is about the disk adapters on the takeover node.

uptime Displays how long the failed node has been down and the host name of the takeover node
aggr status Displays information only about the hardware that is attached to the takeover node

Does not display information about the hardware that is attached only to the failed node

For example, the disk adapter information that the partner aggr status -r command displays is about the disk adapters on the takeover node.