Package: core-network
Description-en: intuitive network emulator that interacts with real nets 
 The Common Open Research Emulator (CORE) is a tool for emulating
 networks in one or more machines. You can connect these emulated
 networks to live networks.

This package is not involved in configuring bridges with brctl.

** Package changed: core-network (Ubuntu) => bridge-utils (Ubuntu)

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  KVM guest cannot use br0 created by brctl on Ubuntu16.04

Status in bridge-utils package in Ubuntu:

Bug description:
  == Comment: #0 - QI YE  - 2016-09-22 06:01:59 ==
  ---Problem Description---
  Ubuntu16.04. Created a bridge br0 on enc100 via brctl.  enc100 is the only 
external accessible nic. Defined a ubuntu guest to use br0 and assigned an IP 
to the guest in the same subnet as br0. After started the guest, couldn't 
access external servers or internet from the guest. 

  ---uname output---
  Linux ntc170 4.4.0-38-generic #57-Ubuntu SMP Tue Sep 6 15:47:15 UTC 2016 
s390x s 390x s390x GNU/Linux
  Machine Type = 2827 (z Systems EC12) 
  A debugger is not configured
  ---Steps to Reproduce---
   1. define br0 on enc100 via brctl command (IP on br0 is for 
  2. update /etc/network/interfaces
  3. create a guest on KVM and use br0 for it's nic
  4. Start guest via virsh command and assign an IP, e.g.  After 
installation, cannot access external systems via KVM host.

  == Comment: #2 - QI YE  - 2016-09-22 09:53:58 ==
  attached sosreport file

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