HP A7533A - Brocade 4Gb SAN Switch Base, Administrator'S Manual

Page: 466 / 576

462 Configuring and monitoring FCIP extension services
The first step to configuring IPsec is to create a policy for IKE and a policy for IPsec. Once the policies have
been created, you assign the policies when creating the FCIP tunnel.
IKE negotiates SA parameters and authenticates the peer using the preshared key authentication method.
Once the two 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 re-created in order to change the parameters. You can delete and re-create 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 parameters listed in Table 93 are fixed and cannot be modified.
The parameters listed in Table 94 can be modified.
Creating an IKE and IPsec policy
For a complete description of the
policy
command, see the Fabric OS Command Reference .
1. Connect to the switch and log in using an account assigned to the admin role.
2. Enter the
policy
command to create IKE and IPsec policies:
policy --create type number [-enc encryption_method][-auth
authentication_algorithm] [-pfs off|on] [-dh DH_group] [-seclife secs]
Table 93 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
Table 94 Modifiable policy parameters
Parameter Description
Encryption Algorithm 3DES—168-bit key
AES-128—128-bit key (default)
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
Security association lifetime in seconds. A new key is
renegotiated before seconds expires. seconds must be between
28800 to 250000000 or 0. The default is 28800.
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