Asus SL1200 - Manual (Page 146)

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Chapter 10 - Configuring VPN
ASUS SL1200
10.5.2.4 Establish Tunnel and Verify
• Start continuous ping from a host on the LAN behind ISR1 to a host
on the LAN behind ISR2. The first few pings would fail. After a few
seconds, The host on the LAN behind ISR1 should start getting ping
response.
• Ping from a host on the LAN behind ISR2 to a host on the LAN behind
ISR1. Ping should be successful.
• The ping might fail due to any of the following:
• The IP address of the host on the LAN behind ISR2 used in the ping
command may not be correct. Check and give the correct IP address.
• Default route is not configured for ISR1 or ISR2. Configure the default
routes as necessary.
• Firewall rules corresponding to VPN connection may not be
configured properly. If any of the network addresses is not correctly
configured, correct the parameters and apply the configuration.
• Local and remote network addresses may not be configured
correctly. The network addresses used in VPN connection rule are
192.168.11.0/255.255.255.0 and 192.168.12.0/255.255.255.0