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aveharsha_30644's avatar
aveharsha_30644
Icon for Nimbostratus rankNimbostratus
Feb 03, 2017

iRule on GTM to allow a specific IP to a specific node

Hi,   I am kinda new to iRules. The scenario is we have GTM and LTM configured on BIG-IP and I want to allow traffic from one particular public IP to one of the 4 available servers (when he hits t...
application delivery
BIG-IP
big-ip gtm
big-ip ltm
developing irules for big-ip
iRules
  • Maneesh_72711's avatar
    Maneesh_72711
    Feb 04, 2017

    You need to understand it would never be the Client IP's which would be querying for Wide IP instead it would be the DNS servers from clients which will be querying for the wide IP.

     

    You can choose Topology based loadbalancing and try specific DNS Server to land go to specific DC, if you are sure about the DNS Servers configured on the clients.

     

    But again you want specific Source IP to talk to specific Server, hence best would be if possible to put all 4 server in a single pool and attach it to both the VIP's on LTM's and then put an i-rule which forces specific Source IP to talk to specific node.

     

    This approach would rule out GTM from the journey let GTM send to any of the DC and irule logic on the LTM takes care of the requirement.

     

Maneesh_72711's avatar
Maneesh_72711
Icon for Cirrostratus rankCirrostratus
Feb 04, 2017

You need to understand it would never be the Client IP's which would be querying for Wide IP instead it would be the DNS servers from clients which will be querying for the wide IP.

 

You can choose Topology based loadbalancing and try specific DNS Server to land go to specific DC, if you are sure about the DNS Servers configured on the clients.

 

But again you want specific Source IP to talk to specific Server, hence best would be if possible to put all 4 server in a single pool and attach it to both the VIP's on LTM's and then put an i-rule which forces specific Source IP to talk to specific node.

 

This approach would rule out GTM from the journey let GTM send to any of the DC and irule logic on the LTM takes care of the requirement.

 

  • aveharsha_30644's avatar
    aveharsha_30644
    Icon for Nimbostratus rankNimbostratus
    Feb 04, 2017

    Thank you Maneesh. Can I try using Static Persist Load Balancing method on GTM Pool (where it selects one among the 2 available DC)? If I am not wrong, this should allow requests coming from a particular LDNS should go through same DC?

     

  • Vijay_E's avatar
    Vijay_E
    Icon for Cirrus rankCirrus
    Feb 04, 2017

    You can certainly use static persist to increase the chances.