How to assign 3 IP address to port?

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Jul 14th, 2008
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I am trying to configure a port on 2811 router fa0/0 to contain 3 IP address. I tried using subinterfaces but it doesn't work. Telling me that it only works if the port is configured for vlan trunking. Is it not possible?

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laichenkang Mon, 07/14/2008 - 02:30
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I don't think I need subinterfaces. Just want 3 IP address. 1 Primary and 2 Secondary. How do I configure that?

paolo bevilacqua Mon, 07/14/2008 - 02:44
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Actually you can have as many secondary addresses you like on a single interface.


a.alekseev Mon, 07/14/2008 - 02:46
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Yes, possible...


but what is the sense?

paolo bevilacqua Mon, 07/14/2008 - 02:52
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Many people make migrations, changes, and expansions, but use addresses that in their view cannot be changed (need to re-configure servers and PCs that really cannot be touched), so having multiple addresses is a often a real necessity.



paolo bevilacqua Mon, 07/14/2008 - 03:00
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Believe it or not, a lot of people is uncomfortable with, or do not have the equipment for VLANs.


Beside, often they want multiple addresses in the same subnet.


Luckily the router has no problem in doing so.


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