[Xen-users] Networking: two dynamic IPs

[lists@xxxxxxxxxx]

Hello.

My host is CentOS 5.3 and Xen is v3.2 (from RPMs provided from Gitco).  One of 
my DomUs is Trixbox that has been having some intermittent issues that I 
believe are due to it being behind my firewall (which is a Linksys router).  My 
ISP gives me two dynamic IPs, so I would like to put my Trixbox DomU on this 
second dynamic IP.  The Trixbox DomU is an HVM DomU.

What is the best way to do this?  I will likely use a small 4-port switch to 
connect my router and Xen host to it so each can get their own IP, however I am 
not sure how this should be setup on Dom0?  A couple ideas I had are:

  1.) Just plug the NIC that is to connect to my ISP, create a bridge with a 
dummy/private IP, and connect the Trixbox to that bridge.  I am not sure if 
that will pass the IP I get from my ISP to the Trixbox DomU?
  2.) If possible, do a PCI pass-through of the NIC that is to connect to my 
ISP to the Trixbox DomU.  Is it possible to do this?

Would either/both of my ideas above work?  Any other suggestions?  (feel free 
to point me to the correct documentation, if it exists)

Thanks, in advance, for you help.

-Alan

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