LTM+GTM at same box

Hi mabdrasol,

it can be done, no problem on using LTM and GTM on the same box. In regards to best practices, I would suggest you create the DNS configuration on your GTM devices, create listener with an IP address different to the current one serving the DNS request. Test extensively via dig/lookups and only when you are sure all is good, you perform the cutover re-pointing the NS records to the GTM's listeners.

Best Regards,

Oscar Pucheta

https://www.australtech.net

https://www.linkedin.com/in/npucheta/

Hi Oscar,

thanks for your replay

I'm confused here in this implementations as my f5 has below interfaces

-self IP (for LTM)

-floating IP (for LTM)

-HA IP

when I try to add GTM and LTM as a servers do I need to add more self IPs for GTM as I cant use same self IP for GTM and LTM.

Hi, The selfip belongs to the device itself, it doesn't matter if you are using LTM or GTM, so, just add the device once, with the non-floating selfip and that's it. If you have LTM provisioned and you want to discover the Virtual Servers, then enable Virtual Server Discovery

if the devices are in HA, add both non-floating self-ips one for each device. But still add only once, so lets say the HA pair has these two devices:

-ltm01

-ltm02

then add the HA pair with a name like this: ltm01-02 and use the non-floating self ip for each device. Important point is that even you have two devices, because they are in HA, you just add once.

Hello Oscar,

thanks for great tips.

now I have added

-F5 node with two self ips

-create listener ip

-create pool with existing LTM VS.

-create wideip with a record for this pool.

-use dig tool to test dns resolving using listening ip from internal lan and resolving worked fine.

now I need to use this test from WAN side but I have a confusion here

here is my design

remote user >>WAN>>NET Router>>FW>>F5 DNS>>F5 LTM>>server

how to map VIP private IP to Real IP?

listener IP is a private IP do I need to NAT it in internet firewall to real IP?

Yeah you have to NAT on the Internet FW.

I have nated the listener IP to real IP but when I try to dig from internet it give no response

DNS  ››  GSLB : Servers : Server List  ››  Virtual Servers

DNS VIP

Address :Real IP

Translation Address: private IP