Forum Discussion

sose_86565's avatar
sose_86565
Icon for Nimbostratus rankNimbostratus
Jan 14, 2009

I think I may need GTM..

I have an F5 with Link Controller and LTM capabilities. My company has 2 ISP's. They want all VPN traffic to primarily run across on of those ISP's. I know I cannot control routing, but I think if the F5 is handling DNS, it can return DNS to point to ISP-A if it is online, or ISP-B is A is down.

 

 

So, DNS would be vpn.xyz.org

 

 

If ISP-A is online, vpn.xyz.org would return 12.55.55.3

 

But, if ISP-A was down, it would return an IP from ISP-B, 24.110.110.6

 

 

Can this be done without GTM?
config
design
  • dennypayne's avatar
    dennypayne
    Icon for Employee rankEmployee
    Jan 14, 2009
    As long as Link Controller is hosting those 2 IP's as virtual servers (1 on each link), you don't need GTM. This means of course that LC must be directly attached to those public IP networks in order to host those IP's.

     

     

    GTM is capable of handing out addresses that it does not host, so if LC is not directly connected to those networks, then yes you'll need GTM.

     

     

    Denny
  • sose_86565's avatar
    sose_86565
    Icon for Nimbostratus rankNimbostratus
    Jan 14, 2009
    Yes, the LC has links configured to connect directly to the routers for those two networks..

     

     

    I have the pool, virtual server, and wide IP configured. I think I am good to go with the proper weighting..
  • sose_86565's avatar
    sose_86565
    Icon for Nimbostratus rankNimbostratus
    Jan 14, 2009
    As this customer wants to set preference to certain inbound/outbound traffic with the ability to fail over to the other ISP if required, do you think it would make sense to make use of regions? Even though there is only one location, it might provide a good method of dividing up this traffic.