Cookbook Configuration
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On the CLI, change the public IP address of the HQ router to a dynamic domain name.
branch(config)#no crypto isakmp key 0 ruijie address 192.168.2.1
branch(config)#crypto isakmp key 0 ruijie hostnameruijie.xicp.net
branch(config)#crypto map Gi0/6 20 ipsec-isakmp
branch(config-crypto-map)#no set peer 192.168.2.1
branch(config-crypto-map)#set peer ruijie.xicp.net
(2) Configure router A in the HQ.
a On the interface configuration page, click a WAN interface to configure it. Dynamic IP addresses can be
allocated in DHCP mode or obtained in dialup mode.