Brocade Mobility 5181 Access Point Product Reference Guide (Supporting software release 4.4.0.0) User Manual
Page 426
412
Brocade Mobility 5181 Access Point Product Reference Guide
53-1002516-01
Configuring an IPSEC tunnel and VPN FAQs
B
•
Question 8: I am using a direct cable connection between my two VPN gateways for testing and
cannot get a tunnel established, yet it works when I set them up across another network or
router. Why?
The packet processing architecture of the access point VPN solution requires the WAN default
gateway to work properly. When connecting two gateways directly, you don't need a default
gateway when the two addresses are on the same subnet. As a workaround, point the access
point's WAN default gateway to be the other VPN gateway and vice-versa.
•
Question 9: I have setup my tunnel and the status still says 'Not Connected'. What should I do
now?
VPN tunnels are negotiated on an "as-needed" basis. If you have not sent any traffic between
the two subnets, the tunnel will not get established. Once a packet is sent between the two
subnets, the VPN tunnel setup occurs.
•
Question 10: I still can't get my tunnel to work after attempting to initiate traffic between the
two subnets. What now?
Try the following troubleshooting tips:
•
Verify you can ping each of the remote Gateway IP addresses from clients on either side.
Failed pings can indicate general network connection problems.
•
Pinging the internal gateway address of the remote subnet should run the ping through the
tunnel as well. Allowing you to test, even if there are no clients on the remote end.
•
Try re-setting the shared secret password on the access point.
•
Question 11: My tunnel works fine when I use the LAN-WAN Access page to configure my
firewall. Now that I use Advanced LAN Access, my VPN stops working. What am I doing wrong?
VPN requires certain packets to be passed through the firewall. Subnet Access automatically
inserts these rules for you when you do VPN. Advanced Subnet Access requires these rules to
be in effect for each tunnel.
•
An 'allow' inbound rule.