ip Probes

The ip probes are described in the following table.

Table 11-48 List of ip Probes

Probe	Description
send	Fires when the kernel network stack sends an ip packet.
receive	Fires when the kernel network stack receives an ip packet.
drop-in	Fires when the kernel network stack drops an incoming ip packet.
drop-out	Fires when the kernel network stack drops an outgoing ip packet.
address-add	IP address added to the system.
address-delete	IP address removed from the system.
address-state-change	IP interface state (flags) change.
route-add	IP route added.
route-change	IP route changed.
route-delete	IP route removed.
route-losing	IP route is failing or Kernel suspects partitioning.
route-miss	Route lookup failed on this address.
route-redirect	Use different route.

These probes trace packets on physical interfaces and also packets on loopback interfaces that are processed by ip. An IP packet must have a full IP header to be visible by these probes.

Note:

Loopback tcp packets on Oracle Solaris may be processed by tcp fusion, a performance feature that by-passes the ip layer. These fused packets will not be visible using the ip:::send and ip:::receive probes. They are typically all loopback tcp packets after the tcp handshake.