ASA in transparent mode with 2 different VLANs but 1 subnet

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Sep 18th, 2009
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Hi,


I have a question about ASA in transparent mode. Would it be possible to deploy ASA in transparent mode with 2 different VLANs but only 1 subnet as attached file? I would like to deploy like this because there are 2 core switches and also 2 server farm switches which is full mesh connected. So, it might be better if it is possible to use just 2 ASA instead of 4.


Please let me know if I misunderstood anything.


Thanks,

Nitass



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Jon Marshall Fri, 09/18/2009 - 10:08
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Nitass


"Would it be possible to deploy ASA in transparent mode with 2 different VLANs but only 1 subnet as attached file?"


Yes, in fact that is the recommended way to deploy a transparent firewall. You need the same IP subnet because it is a L2 firewall not L3. But you have to use 2 vlans to avoid STP issues ie. if you only used 1 vlan you would get a L2 loop.


Jon

nitass Sat, 09/19/2009 - 03:25
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Jon,


Thank you very much but I am so sorry I could not catch you. Have you had a look my diagram? Would you mind explaining me a little bit more?


Thanks,

Nitass

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