Set more than 2 IP-addresses on interface

[lardum]

Does someone know how to set more than 2 IP-addresses on the same interface? Or is it even possible?

Regards

Lars

 

[wybnormal]

You can use secondary IP addresses or sub-interfaces and each gets it's own IP.

Mike S

 

[lardum]

That means that i can use for example 4 IP-addresses on an ethernet interface? Am i right? What command is it? Do i use
IP ADDRESS A.A.A.A B.B.B.B
IP ADDRESS C.C.C.C D.D.D.D secondary
IP ADDRESS E.E.E.E F.F.F.F secondary
IP ADDRESS G.G.G.G H.H.H.H secondary

Regards

Lars

 

[jeter]

NO thats not correct .
example
route#conf t
router(config)int fa 0 <---this would be on the ethernet port
ip address 192.168.1.1 255.255.255.0
ip address 192.168.2.1 255.255.255.0 secondary

the same applies on the serial interfaces
I hope this helps , Good Luck !!

 

[lardum]

Yes, i do know that, but if i want more than 2 IP addresses on the same ethernet interface?

Regards

Lars

 

[wybnormal]

You get TWO with a secondary interface.. if you want more.. then it's time for subinterfaces.

try this link for more details

http://www.cisco.com/univercd/cc/td/doc/product/software/ios102/accscg/76715.htm#18772

Mike S

 

[ariev]

Hi

there is no trouble adding as much secondary ip addresses - no need for subinterfaces...


Arie

 

[wybnormal]

LOL- LARDUM, here is the classic two ways to do the same thing. Ariev is promoting the secondary IP addressing and I'm a subinterface *nut* Choose your poison as both will work. To be sure, there subtle differences but in your case I doubt they matter very much. In my case, I prefer the control a logical sub-interface gives me which is more then just having the second IP answering packets.

If you have a spare router I might suggest that you set it up each way and see which one you would prefer and which would work best for you.

Mike S

PS- I had been told( didnt look it up) that 2 was the limit for the secondary IP.. I guess I need to go and look it up after all. Add one more nugget of info the to pile

 

[88116]

hi there, does someone know how to set the cisco route in this way?
e0/0 = 192.168.28.8 netmask 255.255.255.0
e0/1 = 192.168.28.9 netmask 255.255.255.0

i did try to use the command: ip classless but it doesn't work..

Regards

James