Руководство По Обслуживанию для Cisco Cisco Packet Data Gateway (PDG)
Generally Available 06-30-2010
Peer-to-Peer Features in Release 9.0
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Peer-to-Peer Features in Release 9.0
This section provides information for new features in the inline Peer-to-Peer support.
Dynamic P2P Signature Updates
P2P traffic detection is tricky because most of the P2P protocol details are proprietary, and
the protocol characteristics change frequently. As these P2P standards are proprietary, there
is a tight coupling between the peers too (all the peers need to understand the protocols).
Since P2P detection depends heavily on the known traffic characteristics the detection can
suffer if the P2P protocol changes, if some existing traffic characteristics were not known
(new use case scenarios), if one P2P traffic characteristic matches with another P2P traffic
(false positives), and if there are flaws (bugs) in the detection logic. Whenever such
degradation in P2P detection logic is identified, the P2P detection logic must be enhanced to
improve the detection accuracy.
the protocol characteristics change frequently. As these P2P standards are proprietary, there
is a tight coupling between the peers too (all the peers need to understand the protocols).
Since P2P detection depends heavily on the known traffic characteristics the detection can
suffer if the P2P protocol changes, if some existing traffic characteristics were not known
(new use case scenarios), if one P2P traffic characteristic matches with another P2P traffic
(false positives), and if there are flaws (bugs) in the detection logic. Whenever such
degradation in P2P detection logic is identified, the P2P detection logic must be enhanced to
improve the detection accuracy.
In the earlier releases, the P2P detection logic was part of the ST-chassis software load
(ST16/ST40 software), to continue to detect new traffic patterns based on the changing
traffic characteristics, operators needed to upgrade the complete software with the updated
detection logic.
(ST16/ST40 software), to continue to detect new traffic patterns based on the changing
traffic characteristics, operators needed to upgrade the complete software with the updated
detection logic.
This release supports dynamic upgrades of the P2P detection logic (signatures) alone on an
active ST16/ST40 without warranting a full software upgrade, and hence without a software
restart or reboot. This is implemented through signature files.
active ST16/ST40 without warranting a full software upgrade, and hence without a software
restart or reboot. This is implemented through signature files.
I
MPORTANT
This release supports dynamic signature upgrades for the following P2P protocols:
Bittorrent, DirectConnect, eDonkey, Gnutella, Skype, Yahoo
Bittorrent, DirectConnect, eDonkey, Gnutella, Skype, Yahoo
For more information, see the Peer-to-Peer Detection Administration Guide.
P2P Protocols Detection Support
With release 9.0, the system supports detection of the following P2P protocols:
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GTalk
●
Voice
●
Non-voice
●
ooVoo
With release 9.0, the system supports enhanced detection accuracy, for charging purposes,
for the following P2P protocols:
for the following P2P protocols:
●
GTalk
●
Voice
●
Non-voice
●
Mute