Cisco Cisco Packet Data Gateway (PDG) Documentation Roadmaps
New In This Release
▀ Peer-to-Peer Features
▄ Cisco ASR 5000 Series Product Overview
OL-22937-01
Peer-to-Peer Features
This section provides information for new features for in-line 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.
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 earlier releases, the P2P detection logic was part of the chassis software load, 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.
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 chassis without
warranting a full software upgrade, and hence without a software restart or reboot. This is implemented through
signature files.
warranting a full software upgrade, and hence without a software restart or reboot. This is implemented through
signature files.
Important:
This release supports dynamic signature upgrades for the following P2P protocols:
Bittorrent, DirectConnect, eDonkey, Gnutella, Skype, Yahoo.
P2P Protocols Detection Support
With release 9.0, the system supports detection of the following P2P protocols:
GTalk
Voice
Non-voice
ooVoo
With release 9.0, the system supports enhanced detection accuracy, for charging purposes, for the following P2P
protocols:
protocols:
GTalk
Voice
Non-voice
Mute
ooVoo