Possible values are:
Type of Livetrace checkpoint. UNKNOWN - Unknown checkpoint. PORT_INPUT -
Received by a port on slowpath. The first slowpath checkpoint is encountered
when the packet enters a certain port. For a certain port, a series of
subsequent checkpoints is usually encountered after the packet traverses through
PORT_INPUT. PORT_OUTPUT - Forwarded to a port on slowpath. The last slowpath
checkpoint is encountered when the packet left a certain port. For a certain
port, a series of checkpoints is usually encountered before the packet traverses
through PORT_OUTPUT. SPOOFGUARD_INPUT - Received by slowpath Spoofguard service.
This checkpoint should be encountered either after the packet encounters
PORT_INPUT or before the packet encounters PORT_OUTPUT. SPOOFGUARD_OUTPUT -
Forwarded from slowpath Spoofguard service. This checkpoint should be
encountered after SPOOFGUARD_INPUT. SPOOFUGARD_DROP - Dropped by slowpath
Spoofguard service. This checkpoint should be encountered after
SPOOFGUARD_INPUT. DFW_INPUT - Received by slowpath DFW service. This checkpoint
should be encountered encountered either after the packet encounters PORT_INPUT
or before the packet encounters PORT_OUTPUT. This checkpoint should after
SPOOFGUARD related checkpoints, if they exist. DFW_OUTPUT - Forwarded from
slowpath DFW service. This checkpoint should be encountered after DFW_INPUT.
DFW_DROP - Dropped by slowpath DFW service.This checkpoint should be encountered
after DFW_INPUT. UPLINK_INPUT - Ingressed via an uplink port on slowpath. The
first slowpath checkpoint is encountered when the packet ingress from external
network via an uplink. UPLINK_OUTPUT - Egressed via an uplink port on slowpath.
The last slowpath checkpoint is encountered when the packet egress to external
network via an uplink. ENS_PORT_INPUT - Received by a port on ENS fastpath. The
first ENS fastpath checkpoint is encountered when the packet enters a certain
port. ENS_PORT_OUTPUT - Forwarded to a port on ENS fastpath. The last ENS
fastpath checkpoint is encountered when the packet left a certain port.
ENS_UPLINK_INPUT - Ingressed via an uplink port on ENS fastpath. The first ENS
fastpath checkpoint is encountered when the packet ingress from external network
via an uplink. ENS_UPLINK_OUTPUT - Egressed via an uplink port on ENS fastpath.
The last ENS fastpath checkpoint is encountered when the packet egress to
external network via an uplink. ENS_DFW_INPUT - Received by ENS fastpath DFW
service. This checkpoint should be encountered after ENS_PORT_INPUT.
ENS_DFW_OUTPUT - Forwarded from ENS fastpath DFW service. This checkpoint should
be encountered after ENS_DFW_INPUT. ENS_DFW_DROP - Dropped by ENS fastpath DFW
service. This checkpoint should be encountered after ENS_DFW_INPUT. ROUTER_DROP
- Dropped by slowpath router service. This checkpoint should be encountered
after PORT_INPUT.
This property may be present in responses from the server, but if it is present
in a request to server it will be ignored.