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Dual ISPs and two redundant VPN tunnels on ASA 5520

Hi All,

  I have a requirement which sounds like this :

  - with two ISPs( of course different public IP subnets ) I will have two firewalls on which we will have to do 2 l2l VPN tunnels.

The VPNs will have to be redundant to each other and in case one of the links is congested , the traffic should switch through the other tunnel .

Has anyone done something like this?

Thanks,

Vlad

2 ACCEPTED SOLUTIONS

Accepted Solutions

Dual ISPs and two redundant VPN tunnels on ASA 5520

Hi Vlad,

To have redundant connections I would suggest the following link:

ASA/PIX 7.x: Redundant or Backup ISP Links Configuration Example

To know when the link is congested? I do not think it would be possible at all on the ASA, perhaps with IP SLA UDP Jitter but I think it is only supported on IOS Routers.

Analyzing IP Service Levels Using the IP SLAs UDP Jitter Operation

Thanks.

Portu.

Please rate any posts you find useful.

View solution in original post

Dual ISPs and two redundant VPN tunnels on ASA 5520

Hi Vlad,

Please let me know if you have any further questions about this post, otherwise please mark it as answered.

Thanks.

View solution in original post

2 REPLIES 2

Dual ISPs and two redundant VPN tunnels on ASA 5520

Hi Vlad,

To have redundant connections I would suggest the following link:

ASA/PIX 7.x: Redundant or Backup ISP Links Configuration Example

To know when the link is congested? I do not think it would be possible at all on the ASA, perhaps with IP SLA UDP Jitter but I think it is only supported on IOS Routers.

Analyzing IP Service Levels Using the IP SLAs UDP Jitter Operation

Thanks.

Portu.

Please rate any posts you find useful.

View solution in original post

Dual ISPs and two redundant VPN tunnels on ASA 5520

Hi Vlad,

Please let me know if you have any further questions about this post, otherwise please mark it as answered.

Thanks.

View solution in original post

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