Re: ip alias

From: Hobbs (deadheadblues@gmail.com)
Date: Wed Jan 21 2009 - 14:30:29 ARST

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You can only define an alias with an IP address in one of your connected
subnets. Otherwise nobody will know how to get to 1.1.1.1.

R5#show ip int bri
Interface IP-Address OK? Method Status
Protocol
Serial1/0 192.168.45.5 YES NVRAM up
up
Serial1/1 192.168.56.5 YES NVRAM up
up
Serial1/2 unassigned YES NVRAM administratively down
down
Serial1/3 unassigned YES NVRAM administratively down
down
R5#conf t

R5(config)#ip alias 1.1.1.1 23
Invalid IP address

R5(config)#ip alias 192.168.45.6 23
R5(config)#

R4#telnet 192.168.45.6
Trying 192.168.45.6 ... Open
R5>

Alias works because the router is on that subnet and will end up seeing
traffic for that address. Otherwise you will need a NAT solution. I don't
know another way around that.

-hth

On 1/21/09, GAURAV MADAN <gauravmadan1177@gmail.com> wrote:
>
> Hi
>
> I found a thread already in groupstudy .. but of no use in my case ,
>
> Can someone tell me why am i getting following error
>
> (config)#do sh ip int br
> Interface IP-Address OK? Method Status
> Protocol
> FastEthernet0/0 unassigned YES unset up
> up
> FastEthernet0/0.13 174.1.31.1 YES manual up
> up
> FastEthernet0/0.1001 174.1.1.1 YES manual up
> up
> FastEthernet0/1 unassigned YES unset administratively down
> down
> Serial0/0/0 174.1.145.1 YES manual up
> up
> Serial0/0/1 174.1.13.1 YES manual up
> up
> SSLVPN-VIF0 unassigned NO unset up
> up
> Loopback0 150.1.1.1 YES manual up
> up
> Rack1R1(config)#
> Rack1R1(config)#ip alias 1.1.1.1 23
> Invalid IP address <==============
>
> Intention is to allow my router respond to telnet request @ 1.1.1.1
>
> PLease let me know where am i missing
>
> Gaurav Madan
>
>
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