Enterasys Networks CSX6000 - Manual (Page 240)

USER’S GUIDE
240 CyberSWITCH
M ULTIPLE MAC/IP A DDRESSES
For backup purposes, you may want to consider using the multiple MAC or multiple IP address
feature to set up redundant configurations to use in conjunction with encryption. In such
configurations, you must be sure that all CyberSWITCH nodes have the same or comparable
Security Associations. When multiple paths through different secure gateways exist, you must be
sure such paths are properly protected.
PPP C OMPRESSION
For IP Layer encryption:
We do not recommend using PPP compression if you anticipate a large percentage of encrypted
traffic across your network. PPP protocol runs at a lower layer than Internet Protocol; therefore, any
data compression performed on ESP datagrams is attempted after the packet has been encrypted.
Unfortunately, well-encrypted data is not compressible.
For Link Layer encryption:
PPP compression is available. This compression takes place before the actual encryption.