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Thread: Problem with multiple NIC's on server

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  1. #1
    Join Date
    Oct 2007
    Location
    Vanløse, Denmark
    Beans
    39
    Distro
    Ubuntu 12.10 Quantal Quetzal

    Question Problem with multiple NIC's on server

    Hi guys!


    I'm in a bit of a pickle here and I really hope you can help me.
    I'm running Ubuntu Server 11.10 on a server with 4 Ethernet ports.

    I've configured two static IP addresses on two different Ethernet ports.

    My /etc/network/interfaces looks like this:
    Code:
    auto lo
    iface lo inet loopback
    
    # The primary network interface
    iface eth0 inet static
    	address 192.168.113.18
    	netmask 255.255.255.0
    	broadcast 192.168.113.255
    	network 192.168.113.0
    	gateway 192.168.113.254
    
    iface eth1 inet static
    	address 192.168.113.19
    	netmask 255.255.255.0
    	broadcast 192.168.113.255
    	network 192.168.113.0
    Now, my problem is kind of weird.
    When I ping 192.168.113.18 I get a response. When I ping 192.168.113.19 I get a response.
    1. If I pull the Ethernet-cable out of eth0 while eth1 still being connected, both .18 and .19 is unresponsive.
    2. If I pull the Ethernet-cable out of eth1 while eth0 still being connected, I still get a response from both .18 and .19.


    What can this be?

    *The attached interfaces.txt file is the original interfaces file. I stripped it down to only eth0 and eth1 for testing this weird behaviour.
    Attached Files Attached Files
    Last edited by knutz; January 5th, 2013 at 10:29 PM.

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