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soymanue's avatar
soymanue
Icon for Nimbostratus rankNimbostratus
Nov 23, 2011

LTM: Wide IP with different Virtual Servers

Hello

 

I have serveral sites using the same host name (For Example: https://www.mysite.com https://www.mysite.com:2443 ).

 

I want to use Wide IPs so www.mysite.com resolves 4 different IP addresses as we have 4 Internet providers).

 

My question is: When you configure the wide IP you must indicate the members with IP address and service port. Shall I configure three times the same wide IP with three differente groups of members (one for each TCP port)?

 

Or should I configure the Wide IP with member address and no service port?

 

Thank you
config
design

5 Replies

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  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Nov 23, 2011
    Hi Manuel,

     

     

    When a DNS query is made, the client doesn't indicate the port that it will eventually use. So I don't see a way for you to return one IP for requests which will eventually going to port 443 and a different one for 1443.

     

     

    If I've misunderstood your question, can you rephrase it?

     

     

    Thanks, Aaron
  • soymanue's avatar
    soymanue
    Icon for Nimbostratus rankNimbostratus
    Nov 24, 2011
    It's clear: The LTM can't give different DNS answers as it doesn't know which port will the TCP connection. But the fact is that you have to configure the port for the member inside the wide IP configuration. So, if I'm using several ports, Can I configure the member just with IP address (no port)? Should it work?

     

  • Kurt_Knochner_5's avatar
    Kurt_Knochner_5
    Icon for Cirrus rankCirrus
    Nov 24, 2011
    Manuel,

     

     

    the ports are used for monitoring purposed on the GTM. So, they are necessary to detect if a service has failed. Without monitoring the GTM would hand out an ip address for a virtual server where the service is no longer available.

     

     

    Regards

     

    Kurt Knochner
  • EmBee_57573's avatar
    EmBee_57573
    Icon for Nimbostratus rankNimbostratus
    Jun 20, 2012
    Hi S,

     

    the GTM can not give back any port number. It can only resolve DNS names, just like a normal DNSserver would do.

     

     

    Maybe you could put a script on your webserver with a redirect.
  • Guillaume_H_'s avatar
    Guillaume_H_
    Icon for Nimbostratus rankNimbostratus
    Aug 18, 2017

    Hi,

     

    We have an only solution.

     

    You define a wide IP on GTM to redirect traffic to an LTM VS. And you create an Irules to redirect traffic on the differents providers.

     

    Kind Regards

     

    Guillaume HUGUES