[Bug 788301] [NEW] Networking fails with two interfaces on the same network

[blue balls]

Public bug reported:

Binary package hint: ifupdown

 Summary: when two network interfaces on the same computer are
configured on the same network, the networking fails.

  Details: I have two network interfaces eth0 and eth1 which have static addresses: 192.168.1.2 and 192.168.1.3.
  The gateway is a home router which has the address 192.168.1.1.
  When both interfaces are brought up with "ifup", I cannot connect to the Internet. When only the first on is "up" and the other one is "down", the connection to the Internet works well.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: ifupdown 0.6.8ubuntu29.2
ProcVersionSignature: Ubuntu 2.6.32-31.61-generic 2.6.32.32+drm33.14
Uname: Linux 2.6.32-31-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Wed May 25 21:41:45 2011
ProcEnviron:
 LANGUAGE=
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ifupdown

** Affects: ifupdown (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 lucid

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https://bugs.launchpad.net/bugs/788301

Title:
  Networking fails with two interfaces on the same network

Status in “ifupdown” package in Ubuntu:
  New

Bug description:
  Binary package hint: ifupdown

   Summary: when two network interfaces on the same computer are
  configured on the same network, the networking fails.

    Details: I have two network interfaces eth0 and eth1 which have static addresses: 192.168.1.2 and 192.168.1.3.
    The gateway is a home router which has the address 192.168.1.1.
    When both interfaces are brought up with "ifup", I cannot connect to the Internet. When only the first on is "up" and the other one is "down", the connection to the Internet works well.

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: ifupdown 0.6.8ubuntu29.2
  ProcVersionSignature: Ubuntu 2.6.32-31.61-generic 2.6.32.32+drm33.14
  Uname: Linux 2.6.32-31-generic i686
  NonfreeKernelModules: nvidia
  Architecture: i386
  Date: Wed May 25 21:41:45 2011
  ProcEnviron:
   LANGUAGE=
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ifupdown