HP StorageWorks Fabric OS 5.2.x administrator guide (5697-0014, November 2009)

Fabric OS 5.2.x administrator guide 373
IKE negotiates SA parameters and authenticates the peer using the preshared key authentication method.
Once the 2 phases of the negotiation are completed successfully, the actual encrypted data transfer can
begin.
IPSec policies are managed using the policy command.
You can configure up to 32 IKE and 32 IPSec policies. Policies cannot be modified; they must be deleted
and recreated in order to change the parameters. You can delete and recreate any policy as long as the
policy is not being used by an active FCIP tunnel.
Each FCIP tunnel is configured separately and may have the same or different IKE and IPSec policies as
any other tunnel. Only one IPSec tunnel can be configured for each GbE port.
IPSec parameters
When creating policies, the following parameters are fixed and cannot be modified:
The following parameters can be modified:
Figure 30 Fixed policy parameters
Parameter Fixed Value
IKE negotiation protocol Main mode
ESP Tunnel mode
IKE negotiation authentication method Preshared key
3DES encryption Key length of 168 bits
AES encryption Key length of 128 or 256
Figure 31 Policy parameters
Parameter Description
Encryption Algorithm 3DES—168-bit key
A ES -128 — 128 - bi t key ( d e fault)
AES-256—256-bit key
Authentication Algorithm SHA-1—Secure Hash Algorithm (default)
MD5—Message Digest 5
AES-XCBC—Used only for IPSec
Security Association lifetime in
seconds
The lifetime in seconds of the security association. If PFS is
enabled, a new IKE SA using new key material will be
negotiated before this value expires. Default is 28800 sec.
PFS (Perfect Forward Secrecy) Applies only to IKE policies. Choices are On/Off and
default is On.
Diffie-Hellman group Group 1—768 bits (default)
Group 14—2048 bits