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RobertOliveira_'s avatar
RobertOliveira_
Nov 28, 2016

GTM- Load balancing methods & physical cabling

The load balancing methods used for the GTM/DNS to determine which VIP to hand the request to- such as RTT, Packet rate, etc (for Wide IP) Does the F5 need to be cabled to public facing internet? Or can the F5 perform these checks being cabled behind-let's say a Nexus 7k?? My thought process is that for the F5 to check those metrics such as packet rate, RTT- the F5 would need to be connected directly to the internet to get accurate readings- No? Or can these metrics still be checked with the F5 being cabled directly to a pair of Core 7k's?

 

thanks! Rob

 

application delivery
BIG-IP
BIG-IP DNS

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  • Vijay_E's avatar
    Vijay_E
    Icon for Cirrus rankCirrus
    Nov 28, 2016

    GTM needs to have a public IP configured as "Listener". A client in the internet should be able to access the GTM Listener Public IP in order to resolve DNS queries. You can have the GTM behind switches/routers as long as you provide a way for the GTM to have a public IP as a listener. This listener IP can also be a private IP address as long as you have a public IP NAT for the private IP.