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Frank_Sweetser_'s avatar
Frank_Sweetser_
Icon for Nimbostratus rankNimbostratus
Mar 17, 2009

Creating pools with mixed services in GTM?

I've gone through the GTM docs, but I still have a question. Assume that I have two LTM instances configured, where each one has a single VIP that services two different TCP ports, such as HTTPS and SIP. Good so far.

 

 

Now my problem is, on the same two F5 units, I also have GTM running, so how should I set up the pools? When adding virtual services, I can add the HTTPS and SIP virtual servers separately, but since GTM has no knowledge of what application the DNS request is being sent for, it has no way of knowing which virtual server the client is looking for. The services aren't equivalent, though, so any one virtual host being down should prevent that VIP from being returned, even if the other service is still answering.

 

 

So the question is, what's the best recommended practice for setting up GTM in this scenario?
config
design

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  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Mar 23, 2009
    if one shouldn't be available without the other you can either add the opposite monitor (sip to the https vip / https to the sip vip) to the pool at the LTM level and use the bigip monitor on the GTM, or if you serve the content separately for non-GTM use, you could add the https virtual server to the GTM pool and then apply a sip monitor to that pool so that GTM gets the https status from the LTM via the bigip monitor and checks the sip status itself.
  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Mar 24, 2009
    Or if you want to logically separate the services I'd think you could create separate A records so that serviceA.example.com can be resolved independent of serviceB.example.com.

     

     

    Aaron