Vyatta 2 IPs on ethernet external interface

framacomputer · 10-27-2012, 05:43 PM

Hello, i would like a single interface to have 2 ip address going to the same router

this is the configuration

show interfaces
ethernet eth0
address 187.20.10.15/24
address 187.20.10.16/24
ethernet eth1
address 192.168.0.1/24

show system gateway-address
gateway-address 187.20.10.10

but from external public ip i can ping only 187.20.10.15 but can not ping 187.20.10.16 ...... why?

Many Thanks

foodown · 10-27-2012, 07:17 PM

For one card to answer on two addresses, you'll need to use a "virtual" interface.

You'd configure the two IPs like ...

Code:

ifconfig eth0 187.20.10.15 netmask 255.255.255.0
ifconfig eth0:1 187.20.10.16 netmask 255.255.255.0

(As root)

Getting them configured to come up that way after a reboot depends on your distribution.

jefro · 10-28-2012, 11:55 AM

Could he mean that from a wan based computer he can't nat to the 16 address because of a router or modem not being configured?

foodown · 10-28-2012, 01:31 PM

Those aren't private IPs ... There should be no reason to do address translation at the gateway. Both IPs should route end-to-end.

jefro · 10-28-2012, 04:31 PM

Opps, yep. Still the issue of how the connection point is being offered to the public isp.

framacomputer · 10-29-2012, 04:50 AM

I have 8 available IPs from ISP, i would like to configure 2 in the same interface

foodown · 10-29-2012, 09:48 AM

Quote:

Originally Posted by framacomputer

I have 8 available IPs from ISP, i would like to configure 2 in the same interface

So, when you use the commands in my post, they still will not reply to ICMP?