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3Com Router 5000 and Router 6000 v2.41
Module Guide
Chapter 3
Multifunctional Interface Modules (Router 5000)
3-15
3.4 NDEC Module
3.4.1 Introduction
Network Data Encryption Module (NDEC) supports IPSec protocol and speeds up the
encryption of IP packets by means of hardware, featuring high performance and high
reliability.
When NDEC module is inserted, the main board of the router handles IP packet
forwarding and implements the VPN with encryption features, and then the NDEC will
complete the task of encryption.
3.4.2 Appearance
The appearance of NDEC module is shown in the following figure.
Figure 3-20 NDEC
3.4.3 Interface Attributes
The interface attributes of NDEC are given in the following table:
Table 3-8 Interface attributes of NDEC
Attribute Description
Protocol supported IPSec
The maximum number of concurrent IPSec
connections
100
Hardware algorithm
1) Key algorithm (DES, 3DES, AES, QC5, Blowfish,
Cast-128, SkipJack)
2) Authentication algorithm (MD5, SHA-1 hash
algorithm)