multihoming issue

Unanswered Question
Sep 16th, 2009
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Hi guys I have a client who is applying for 2 internet leased line circuits from 2 different ISP's.


I have 2 - cisco 2800 router for the internet connectivity.


I have a L3 switch in the internal zones of the routers.


Both the ISP's have given /30 public network for the wan. I dont have any doubt on that.


But both the ISP's are giving different /28 networks for the internal usage. (for eg to host some servers)


I have 2 - ASA 5510 behind the routers which are going to use public ip addresses given by the ISP's.


The customer wants to use only 1 ISP at a time and if that ISP goes down I should be using the other ISP.


But my doubt is both the pulic ip addresses given by the ISP are of different network subnets and it wont be possible to manually change the IP ADDRESSES ON THE ASA 5510.


Please help me with some solution.


Thanks & Regards,

Jvalin

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paolo bevilacqua Wed, 09/16/2009 - 03:12
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