More information on DHCP flows on Netmania. If we do not see DHCP Offers coming from the DHCP server or no Acknowledgment packets to the AP's wired interface, then there is likely an upstream or DHCP server issue. Once you have downloaded a packet capture file, open it in Wireshark and use the filter “dhcp” to show DHCP packets.
Multiple captures and attempts are important to ensure you have a useful amount of data. This is helpful for determining whether DHCP Offers or Requests are passing through the access point.
Run a packet capture on the AP’s wired interface and initiate the connection from an affected client multiple times.Reduce the DHCP lease duration, if it is feasible to do so. Doing so may help clients experiencing DHCP addressing issues by freeing up more space in the addressing pool held by inactive devices.Create a test SSID in NAT mode and try to connect again with a client that is experiencing issues. This will help determine whether there are issues with local DHCP servers.The following steps can help to narrow down the scope of the issue: This is often caused because of a sudden increase in the number of clients using the network, so it's usually best to check for that first. My apologies for the long winded post but I wanted to be clear exactly how things were setup and what was / was not working so I'm not wasting peoples valuable time.An exhausted DHCP pool is the most common reason responsible for DHCP issues. If my assumption is correct exactly how and what do I need to configure to allow the GVPN connection to work to the fixed IP? I assume that I need to do some more setup, perhaps in Objects and / or Policies to allow the packets. If I look at the packet monitor I can see packets coming in from my client for port 500 that are being dropped. If I use the fixed IP address that I have specified in the X2 interface, in the peer list of the GVPN client the connection fails with "The peer is not responding to phase 1 ISAKMP requests" However, this only works if I use the dynamic IP allocated to the X2 interface in the peer list of the GVPN client I have set up the X2 interface to successfully connect to the Internet and, following Sonicwall documentation, have put one of my fixed IP addresses in the 'Specify IP Address' in the X2 interface.Īfter working through the Sonicwall documentation regarding setting up both Group VPN and the GVPN client I have a successful VPN tunnel between my client and the TZ670. The Internet connection is allocated a dynamic IP at the time the TZ670 connects, with the fixed IP addresses routed over that connection The Internet connection is BT Infinity FTTC & I have multiple fixed IP addresses assigned by BT So I have a TZ670 running the latest firmware 7.0.1-R1456. I'm a real newbie with sonicwall so please be gentle :-)
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