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LoveNoodles's avatar
LoveNoodles
Icon for Altocumulus rankAltocumulus
Jan 23, 2010

GTM sync

Hi There;

 

 

Could someone kindly assist. I am planning to synch a GTM to an existing group, now the scenario is this:

 

 

I have 3 GTMs already in a synch group with synch group name called "default" on each of the 3 GTMs. I have a unconfigured GTM ready to be synched to the synch group with synch group name called "default" also.

 

 

Now i can recall that the synch group name "default" has to be changed to another name before i synch the unconfigured GTM. But i am not sure on which GTM i should change the synch group "default" name.

 

 

Do i change it on the unconfigured GTM (the GTM that has to be synched) ?

 

 

Do i change it on all three of the already synched GTMs?

 

 

Or do i change it on one of the 3 already synched GTMs, the GTM chosen to do the gtm_add command against?

 

 

I can recall that if changed on the incorrect GTM, then the unconfigured GTM will synch its config to the synch group, therefore wiping out the existing configs on the already synched 3 GTMs.

 

 

On a aecond note, is it essential to create a new self certificate and key on the unconfigured GTM before synching and exchanging certificates?

 

 

Therefore if anyone can point me the right direction it would be very much appreciated.

 

 

Many thanks
config
design
  • The_Bhattman's avatar
    The_Bhattman
    Icon for Nimbostratus rankNimbostratus
    Jan 26, 2010
    I think your best bet is to call F5 support to answer your questions.

     

     

     

    Bhattman
  • Sly_85819's avatar
    Sly_85819
    Icon for Nimbostratus rankNimbostratus
    Jan 21, 2011
    Here is what I would do based on the F5 implementation guide:

     

    1. Add the new GTM under "servers" in one of the GTM's. This will make sure that keys are exchanged *** MAKE SURE SYNC IS DISABLED ON THE NEW BOX **

     

    1. Remove devices from sync group first

     

    2. Make sure they are independent and you don't see any sync session going good. Might be good to run "tail -f /var/log/gtm" in the background for messages

     

    3. Change sync group on one of the running device say "A" (with current config) to "new name"

     

    4. Run "gtm_add A" on the other devices (excluding new GTM). This will fetch the config from "A" including sync group. Check syslogs etc. to make sure that all device are in the sync group. Create a test server and make sure that it is reflecting on other GTM's too [optional but a simple check]

     

    5. Run "gtm_add A" on the new GTM which will also fetch the config and I hope will get the sync conf too.

     

     

    ** From my experience I had seen that if you break the sync group and add the devices back to the same group, it doesnt work. Somehow it doesnt like the same name. I ended up configuring new sync group. I didnt get satisfactory answer from support as why it did not work :-) **

     

     

    ALL THE BEST! Make sure you backup the config before the activity and dont enable sync settings on the new GTM without "gtm_add" first
  • Cholito_15468's avatar
    Cholito_15468
    Icon for Nimbostratus rankNimbostratus
    Mar 08, 2012
    Hi goga

     

     

    This solution

     

    http://support.f5.com/kb/en-us/products/big-ip_gtm/manuals/product/gtm_lc_impl_guide_10_1/solgl_adding_second_gtm.html999916

     

  • Cholito_15468's avatar
    Cholito_15468
    Icon for Nimbostratus rankNimbostratus
    Mar 21, 2012
    you need is to rename the main group.

     

    and then perform gtm_add IP_gtm02 IP_gtm03