283
remote address: 2.2.3.1
Flow:
as defined in ACL 3101
[Inbound ESP SA]
SPI: 54321 (0x0000d431)
Transform set: ESP-ENCRYPT-AES-CBC-192 ESP-AUTH-SHA1
No duration limit for this SA
[Outbound ESP SA]
SPI: 12345 (0x00003039)
Transform set: ESP-ENCRYPT-AES-CBC-192 ESP-AUTH-SHA1
No duration limit for this SA
Configuring an IKE-based IPsec tunnel for IPv4 packets
Network requirements
As shown in Figure 87, establish an IPsec tunnel between Switch A and Switch B to protect data
flows between the switches. Configure the IPsec tunnel as follows:
• Specify the encapsulation mode as tunnel, the security protocol as ESP, the encryption
algorithm as AES-CBC-192, and the authentication algorithm as HMAC-SHA1.
• Set up SAs through IKE negotiation.
Figure 87 Network diagram
Configuration procedure
1. Configure Switch A:
# Configure an IP address for VLAN-interface 1.
<SwitchA> system-view
[SwitchA] interface vlan-interface 1
[SwitchA-Vlan-interface1] ip address 2.2.2.1 255.255.255.0
[SwitchA-Vlan-interface1] quit
# Configure an ACL to identify data flows between Switch A and Switch B.
[SwitchA] acl number 3101
[SwitchA-acl-adv-3101] rule 0 permit ip source 2.2.2.1 0 destination 2.2.3.1 0
[SwitchA-acl-adv-3101] quit
# Create an IPsec transform set named tran1.
[SwitchA] ipsec transform-set tran1
# Specify the encapsulation mode as tunnel.
[SwitchA-ipsec-transform-set-tran1] encapsulation-mode tunnel
# Specify the security protocol as ESP.
[SwitchA-ipsec-transform-set-tran1] protocol esp
# Specify the ESP 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
Internet
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Switch A
Switch B
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