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Operational modes
H P Velocity protects and optimizes data flows between H P thin clients and HP Velocity enabled
virtual desktops or terminal services servers. It provides three operational modes:
Protect, Monitor, and Off.
Protect mode
Protect mode is the default and recommended operational mode. In this mode, HP Velocity
provides session establishment, H P Velocity-protected flow statistics, packet loss protection,
WiFi optimization, and latency mitigation.
Monitor mode
In Monitor mode, H P Velocity monitors for packet loss and continuously profiles the end-toend
network conditions over established flows. This mode disables all H P Velocity network
optimizers and is useful for acquiring baseline network characteristics.
Off mode
In Off mode, H P Velocity passes all network flows transparently and does not perform any
monitoring or optimization.
Establishing a connection
An H P Velocity-protected connection is established over four steps (Figure 1):
• Initialization
• Beaconing
• Handshaking
• Protected state
Figure 1. Establishing a connection
Initialization
During initialization, H P Velocity-enabled endpoints start streaming data transparently. No
optimizations are performed.
H P Velocity Server Side Deployment Guide 10
HP Velocity functional overview Establishing a connection
Beaconing
Once an H P Velocity-enabled endpoint detects that a bidirectional network path is available, it
periodically modifies packet headers (both IP and TCP) in a seamless way to advertise itself to
other HP Velocity-enabled endpoints (Figure 2).
IP headers can contain both IP ID-based beacons (using an option value of 0x420B) and IP
Option-based beacons (using an option value of 0x880477FB). TCP flows can use TCP
Option-based beacons (using an option value of 0x01 No-Operation and seven sets of End of
Option Lists 00000000000000).
Once an HP Velocity-enabled endpoint processes enough beacons on a network flow to
discover that another H P Velocity-enabled endpoint is at the other end, handshaking occurs.