Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

3020 Concentrator Load balancing & Fault Tolerance

Hi friends,

Can 3020 model support both load-balancing and High-Availability??

Regards at same time?


Re: 3020 Concentrator Load balancing & Fault Tolerance


In VPN, you can either use load-balance or VRRP at any time.

Both load-balance and VRRP are meant for high-availability but with different function & perspective.

In high-availability, both VPN units are in operational mode with cluster members distribute the VPN tasks/processes equally.

In VRRP, only one VPN is active at any time to handle all VPN access/connectivity. Standby unit will not do anything until primary unit is down.



New Member

Re: 3020 Concentrator Load balancing & Fault Tolerance

In short, both load-balancing and VRRP (redundancy) cannot be configured at the same time.

Further, to help you choose, if your objective is to accommodate a lot of VPN tunnels (I am talking like hundreds of them), then use load-balancing. In this case, there is some amount of redundacy as well because when the master concentrator goes down, another concentrator in the cluster takes up the role and the clients can keep connecting.

If redundancy is all you are looking for and do not have hundreds of VPN connections, then use VRRP.