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Cisco Prime Network 4.0 User Guide
OL-29343-01
Chapter 25 Monitoring Mobile Technologies
LTE Networks
Table 25-54 IKEv2 IPSec Transform Set/IKEv2 Transform set Details
Field Description
Name The name of the transform set.
DH Group The Diffie-Hellman (DH) group for the transform set, which can be any one
of the following:
• 1—Configure Diffie-Hellman Group 1:768-bit MODP Group
• 14—Configure Diffie-Hellman Group 14:2048-bit MODP Group
• 2—Configure Diffie-Hellman Group 2:1024-bit MODP Group
• 5—Configure Diffie-Hellman Group 5:1536-bit MODP Group
This field defaults to 2—Configure Diffie-Hellman Group 2:1024-bit
MODP Group.
Note The DH group is used to determine the length of the base Prime
numbers used during the key exchange process in IKEv2. The
cryptographic strength of any key derived, depends in part, on the
strength of the DH group upon which the prime numbers are based.
Cipher The appropriate encryption algorithm and encryption key length for the
IKEv2 IKE security association, which can be any one of the following:
• 3des-cbc
• aes-cbc-128
• aes-cbc-256
• des-cbc
• Null
This field defaults to AESCBC-128.
HMAC The Hash Message Authentication Code (HMAC) for the IKEv2 IPSec
transform set,which can be any one of the following:
• aes-xcbc-96
• md5-96
• sha1-96
• sha2-256-128
• sha2-384-192
• sha2-512-256
This field defaults to sha1-96.
Note HMAC is a type of message authentication code calculated using a
cryptographic hash function in combination with a secret key to
verify both data integrity and message authenticity. A hash takes a
message of any size and transforms it into a message of fixed size
(the authenticator value), which is truncated and transmitted.