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  • 1.  HACMP with two redundent ethernet Switch

    Posted Tue January 20, 2009 07:03 AM

    Originally posted by: rakeshsinnya


    I've already done the HACMP Configuration with single ethernet switche. But this time it has to be configured with two redundent ethernet switch ( cisco 2950 using STP). Has it to be configured in different way than previous one ( with single ethernet switch) if yes please provide the documents. any help will be appreciable.

    thanks in advance


  • 2.  Re: HACMP with two redundent ethernet Switch

    Posted Tue January 20, 2009 08:46 AM

    Originally posted by: CRM


    I am assuming that these switches are not stacked switches (so appearing as one virtual switch).

    In this case if you have Spanning tree on then also make sure that portfast is on.

    You have two choices - either configure a network interface backup link (one link into each switch) and let AIX Etherchannel take care of the resilience using a single network adapter (the etherchannel) presented to HA.

    You could also define two different boot adapters on different subnets and let HA alias the service IP address(es) onto the boot adapters, then HA will fail over the addresses if an interface fails.

    My main decision for which method to use is how good is your monitoring. HA will alert you to adapter failures in the HA logs, AIX etherchannel are alerted in the errpt, which one do you monitor best would be my decision point.

    regards

    Chris


  • 3.  Re: HACMP with two redundent ethernet Switch

    Posted Wed January 21, 2009 12:21 AM

    Originally posted by: rakeshsinnya


    Thanks for your reply:

    Here is one querry:

    as per the document i've found that etherchannel does not work with two different switch.

    waiting for your response.

    thank you


  • 4.  Re: HACMP with two redundent ethernet Switch

    Posted Wed January 21, 2009 05:22 AM

    Originally posted by: CRM


    Network interface backup - NIB - where one link to one switch is active and one is inactive works.

    Load balanced will not with Cisco unless you have a Virtual Switch Solution.

    regards

    Chris


  • 5.  Re: HACMP with two redundent ethernet Switch

    Posted Wed January 21, 2009 11:47 PM

    Originally posted by: rakeshsinnya


    once again thanks for your reply. So u r sure IF i us NIB then HACMP will work with two different switch using STP. So it will be so nice of you if you provide me me the link of the document to set up the NIB in hacmp ( my aix version is 6.1 )

    Thanks in advance


  • 6.  Re: HACMP with two redundent ethernet Switch

    Posted Thu January 22, 2009 05:00 AM

    Originally posted by: CRM


    Try the manual:

    http://publib.boulder.ibm.com/infocenter/pseries/v5r3/topic/com.ibm.aix.commadmn/doc/commadmndita/etherchannel_backupconfigaix52.htm#etherchannel_backupconfigaix52

    regards

    Chris


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