Many enterprise networks have existing MPLS circuits that connect locations. However if the MPLS goes down, the connection to a remote location is lost. MX Security Appliances can be placed in these networks to dynamically fail over to a VPN connection via a secondary Internet connection. This article describes how the Cisco Meraki Cloud manages the VPN tunnel based on the status of the Internet uplinks, and will illustrate the complete flow of traffic when the VPN is properly enabled and functioning.
Cisco systems, inc. Www.cisco.com 2 the specifications and information regarding the products in this manual are subject to change without notice. All statements, information, and recommendations in this manual are believed to be accurate but are presented without warranty of any kind, express or implied. You can find full information in hvere: https://uzefullinformation.blogspot.com/2017/04/fix-error-56-cisco-system-inc-vpn.html.
General Network Design and Considerations
Error 56: The Cisco Systems, Inc. VPN Service has not been started. Please start this service and try again. Of course the service is started; so that's not very helpful. It's been working for years (two years), but today i go to use it and it's borken. Cisco VPN client software is somehow missing something to be able to work on Window10 OS. Luckily, that missing thing is available in SonicWALL Global VPN Client software. So, to fix the issue, we need to install SonicWALL Global VPN Client software first and install Cisco VPN client just after that. Here is the link to download SonicWALL. How to Install Cisco VPN Client on Windows 10 (New installations or O/S upgrades) The instructions below are for new or clean Windows 10 installations. Users who just upgraded to Windows 10 from an earlier Windows version, will need to first uninstall their SonicWALL VPN Client & Cisco VPN client, then proceed with the instructions below.
There are a few high level concepts to mention before getting into the details of network design:
- The MX at the branch location must use the Internet connection of HQ to send its management traffic to the Cloud while the MPLS is in use. With this in mind, the MPLS routers at the branch locations must have a route for Internet bound traffic. For client devices, you can use Flow preferences on the Branch MX to direct Internet bound traffic out the ISP at the branch.
- MXes need to form a VPN over the MPLS connection because unsolicited inbound traffic is dropped. VPN between the two sites resolves this issue.
- If the MPLS fails, the Branch MX will switch to its secondary Internet connection and the MXes will establish a tunnel over VPN.
MPLS Setup in Detail
Diagram of traffic flow when VPN is established over the MPLS Circuit.
Detailing the Flow of VPN Traffic
- Host at Branch location wants to talk to host at HQ.
- SRC IP 172.16.0.10 > DST IP 10.0.5.20.
- Host routes traffic to its default Gateway (Branch MX).
- Branch MX has a VPN tunnel built for that remote Subnet (10.0.5.0/24) thanks to the knowledge of the Cloud.
- Data is encapsulated and sent over the VPN tunnel to the HQ MX in Concentrator Mode.
- MX Concentrator decapsulates the packet and delivers it to its DST IP (10.0.5.20).
- HQ client computer (10.0.5.20) responds to the packet and sends it to its default gateway (HQ Firewall), since it doesn't know about the location of the Branch network.
- HQ Firewall receives the packet and knows that it must route all traffic with a DST network of 172.16.0.0/24 back to the MX Concentrator.
- You need a static route pointing all Remote networks to the MX Concentrator. Example Cisco IOS route statement: ip route 172.16.0.0 255.255.255.0 10.0.5.254.
- The MX concentrator has a tunnel established for the network ID of 172.16.0.0/24, so it encapsulates the traffic and sends it to the Branch MX.
- The Branch MX decapsulates the packet and delivers it to the DST host (172.16.0.10).
- This communication works the same way whether the MXes communicate over the MPLS or over their individual Internet connections.
Cisco Meraki VPN Registry
When the MX devices report to the Dashboard, the Dashboard records both the SRC IP address of the traffic and the Interface IP of the MX. Sometimes these addresses do not match. This is common when the Device is placed in 1-armed VPN Concentrator Mode. This means that the MX has a private IP address, and VPN traffic is forwarded to the hardware for encapsulation.
Below is a screenshot of the Security & SD-WAN > Monitor > Appliance status > Uplink page. Notice that the WAN IP is different from the Public IP address.
In the diagram above, the Branch MX is routing all traffic over the MPLS to the HQ firewall. The Dashboard bound traffic has the same SRC IP address (230.45.122.56) as the HQ MX Concentrator. However, the IP addresses of the Interfaces (10.0.5.254 and 192.168.1.2) are both local to their network, and those addresses are reported to the Dashboard as well.
Below is an example of VPN Registry and the IP addresses that the Cloud records.
In this example, the Dashboard knows that the two devices can’t form a VPN Tunnel through the same SRC IP address, so it will try the IP addresses of the Interfaces. The routing through the MPLS allows the MX devices to communicate using these Private IP addresses, and the tunnel is dynamically established.
Failover to Secondary ISP when MPLS Circuit is Not Available
If the MPLS goes down, the Branch MX will know that it lost connection to the Cloud and will fail over to its backup ISP connection. Once the MX is communicating with the Cloud again, the registry entry is updated.
Below is an example of the VPN Registry now that the Branch is communicating to the Cloud from a different public IP address.
The MX Concentrator will now establish the VPN to the Public IP address of the Branch MX.
Flow Preferences
Some users prefer to send Internet bound traffic out the secondary Internet connection at the branch location. You can add Flow Preferences under Security & SD-WAN >Configure > SD-WAN & traffic shaping. The MX will route the traffic according the most specific route. Since the VPN routes are more specific than the route of 0.0.0.0/0, the VPN traffic will go out the VPN Interface.
Below is a screenshot of Flow preferences that facilitate the desired traffic flow:
MX Site-to-site VPN allows remote sites to dynamically fail over to back up Internet Connections when an MPLS connection becomes unavailable. This can happen automatically since the MX harnesses the information that the Cloud knows about the devices.
Additional Resources
For a configuration that allows an existing MPLS link to fail-over to a site-to-site VPN connection, please refer to our documentation onMPLS failover to site-to-site VPN.
Troubleshooting
In this article, we will see how to install Cisco VPN client on Windows 10 Operating System and fix the issue that it cannot establish remote VPN connection.
- There are two problems actually occur about Cisco VPN client on Windows 10. The first problem is Cisco VPN client software is not able to to install on Windows 10 Operating System. Normally, we get the error message of “Error 27850. Unable to manager networking component. Operating system corruption may be preventing installation” at almost the final step of the installation process.
- The second problem occur accordingly after the installation is successfully done and we try to connect Cisco VPN client. The error message is “Secure VPN Connection terminated locally by the Cleint. Reason 442: Failed to enable Virtual Adapter error”.
- Cisco VPN client software is somehow missing something to be able to work on Window10 OS. Luckily, that missing thing is available in SonicWALL Global VPN Client software. So, to fix the issue, we need to install SonicWALL Global VPN Client software first and install Cisco VPN client just after that. Here is the link to download SonicWALL Global VPN. http://help.mysonicwall.com/Applications/vpnclient.
- After successfully install Cisco VPN client, we can remove SonicWALL Global VPN Client software in order to save system resources and prevent it from running further.
- When trying to establish remove VPN connection to VPN gateway in Windows 10 OS with Cisco VPN client, an error occur as in the problem description section above. To fix this issue, follow the following steps.
Step1: Open Windows Registry Editor by typing regedit in the run.
Step2: After that, browse in the Registry Key to the following path.
Step3: On DisplayName right-click and choose Modify.
– For Windows 10 32bit: modify the value data from “@oem8.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter” to “Cisco Systems VPN Adapter”.
– For Windows 10 64bit: modify the value data from “@oem8.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter for 64-bit Windows” to “Cisco Systems VPN Adapter for 64-bit Windows”. For our case is Windows 10 64bit OS.
Step4: Try to establish remote VPN connection with Cisco VPN client again. The connection should work as the following.
Cisco Global Vpn Client Download
Test ping to any IP in the remote LAN to make sure the Cisco VPN client is really working properly.
Cisco Systems Inc Vpn Service Missing Key
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