Example: Configuring main-mode IKE with pre-shared key authentication

As shown in Figure 124, configure an IKE-based IPsec tunnel between Switch A and Switch B to secure the communication between the switches.

• Configure the two switches to use the default IKE proposal for the IKE negotiation.

• Configure the two switches to use the pre-shared key authentication method for the IKE negotiation.

1. Make sure Switch A and Switch B can reach each other.

2. Configure Switch A:

   # Configure an IP address for VLAN-interface 1.

   <SwitchA> system-view
   [SwitchA] interface vlan-interface 1
   [SwitchA-vlan-interface1] ip address 1.1.1.1 255.255.0.0
   [SwitchA-vlan-interface1] quit
   

   # Configure IPv4 advanced ACL 3101 to identify the traffic from Switch A to Switch B.

   [SwitchA] acl advanced 3101
   [SwitchA-acl-ipv4-adv-3101] rule 0 permit ip source 1.1.1.1 0 destination 2.2.2.2 0
   [SwitchA-acl-ipv4-adv-3101] quit
   

   # Create an IPsec transform set named tran1.

   [SwitchA] ipsec transform-set tran1
   

   # Set the packet encapsulation mode to tunnel.

   [SwitchA-ipsec-transform-set-tran1] encapsulation-mode tunnel
   

   # Use the ESP protocol for the IPsec transform set.

   [SwitchA-ipsec-transform-set-tran1] protocol esp
   

   # Specify the encryption and authentication algorithms.

   [SwitchA-ipsec-transform-set-tran1] esp encryption-algorithm aes-cbc-192
   [SwitchA-ipsec-transform-set-tran1] esp authentication-algorithm sha1
   [SwitchA-ipsec-transform-set-tran1] quit
   

   # Create an IKE keychain named keychain1.

   [SwitchA] ike keychain keychain1
   

   # Specify 12345zxcvb!@#$%ZXCVB in plain text as the pre-shared key to be used with the remote peer at 2.2.2.2.

   [SwitchA-ike-keychain-keychain1] pre-shared-key address 2.2.2.2 255.255.0.0 key simple 12345zxcvb!@#$%ZXCVB
   [SwitchA-ike-keychain-keychain1] quit
   

   # Create an IKE profile named profile1.

   [SwitchA] ike profile profile1
   

   # Specify IKE keychain keychain1.

   [SwitchA-ike-profile-profile1] keychain keychain1
   

   # Configure a peer ID with the identity type as IP address and the value as 2.2.2.2/16.

   [SwitchA-ike-profile-profile1] match remote identity address 2.2.2.2 255.255.0.0
   [SwitchA-ike-profile-profile1] quit
   

   # Create an IKE-based IPsec policy entry. Specify the policy name as map1 and set the sequence number to 10.

   [SwitchA] ipsec policy map1 10 isakmp
   

   # Specify the remote IP address 2.2.2.2 for the IPsec tunnel.

   [SwitchA-ipsec-policy-isakmp-map1-10] remote-address 2.2.2.2
   

   # Specify ACL 3101 to identify the traffic to be protected.

   [SwitchA-ipsec-policy-isakmp-map1-10] security acl 3101
   

   # Specify IPsec transform set tran1 for the IPsec policy.

   [SwitchA-ipsec-policy-isakmp-map1-10] transform-set tran1
   

   # Specify IKE profile profile1 for the IPsec policy.

   [SwitchA-ipsec-policy-isakmp-map1-10] ike-profile profile1
   [SwitchA-ipsec-policy-isakmp-map1-10] quit
   

   # Apply IPsec policy map1 to VLAN-interface 1.

   [SwitchA] interface vlan-interface 1
   [SwitchA-Vlan-interface1] ipsec apply policy map1
   

3. Configure Switch B:

   # Configure an IP address for VLAN-interface 1.

   <SwitchB> system-view
   [SwitchB] interface Vlan-interface1
   [SwitchB-Vlan-interface1] ip address 2.2.2.2 255.255.0.0
   [SwitchB-Vlan-interface1] quit
   

   # Configure IPv4 advanced ACL 3101 to identify the traffic from Switch B to Switch A.

   [SwitchB] acl number 3101
   [SwitchB-acl-adv-3101] rule 0 permit ip source 2.2.2.2 0 destination 1.1.1.1 0
   [SwitchB-acl-adv-3101] quit
   

   # Create an IPsec transform set named tran1.

   [SwitchB] ipsec transform-set tran1
   

   # Set the packet encapsulation mode to tunnel.

   [SwitchB-ipsec-transform-set-tran1] encapsulation-mode tunnel
   

   # Use the ESP protocol for the IPsec transform set.

   [SwitchB-ipsec-transform-set-tran1] protocol esp
   

   # Specify the encryption and authentication algorithms.

   [SwitchB-ipsec-transform-set-tran1] esp encryption-algorithm aes-cbc-192
   [SwitchB-ipsec-transform-set-tran1] esp authentication-algorithm sha1
   [SwitchB-ipsec-transform-set-tran1] quit
   

   # Create an IKE keychain named keychain1.

   [SwitchB]ike keychain keychain1
   

   # Specify 12345zxcvb!@#$%ZXCVB in plain text as the pre-shared key to be used with the remote peer at 1.1.1.1.

   [SwitchB-ike-keychain-keychain1] pre-shared-key address 1.1.1.1 255.255.0.0 key simple 12345zxcvb!@#$%ZXCVB
   [SwitchB-ike-keychain-keychain1] quit
   

   # Create an IKE profile named profile1.

   [SwitchB] ike profile profile1
   

   # Specify IKE keychain keychain1

   [SwitchB-ike-profile-profile1] keychain keychain1
   

   # Configure a peer ID with the identity type as IP address and the value as 1.1.1.1/16.

   [SwitchB-ike-profile-profile1] match remote identity address 1.1.1.1 255.255.0.0
   [SwitchB-ike-profile-profile1] quit
   

   # Create an IKE-based IPsec policy entry. Specify the policy name as use1 and set the sequence number to 10.

   [SwitchB] ipsec policy use1 10 isakmp
   

   # Specify the remote IP address 1.1.1.1 for the IPsec tunnel.

   [SwitchB-ipsec-policy-isakmp-use1-10] remote-address 1.1.1.1
   

   # Specify ACL 3101 to identify the traffic to be protected.

   [SwitchB-ipsec-policy-isakmp-use1-10] security acl 3101
   

   # Specify IPsec transform set tran1 for the IPsec policy.

   [SwitchB-ipsec-policy-isakmp-use1-10] transform-set tran1
   

   # Specify IKE profile profile1 for the IPsec policy.

   [SwitchB-ipsec-policy-isakmp-use1-10] ike-profile profile1
   [SwitchB-ipsec-policy-isakmp-use1-10] quit
   

   # Apply IPsec policy use1 to VLAN-interface 1.

   [SwitchB] interface vlan-interface 1
   [SwitchB-Vlan-interface1] ipsec apply policy use1
   

# Initiate a connection between Switch A and Switch B to trigger IKE negotiation. After IPsec SAs are successfully negotiated by IKE, the traffic between the two switches is IPsec-protected.