[CentOS] Poor perfmance of bridged interfaces

Thu Nov 12 21:07:46 UTC 2015
James A. Peltier <jpeltier at sfu.ca>

----- Original Message -----
| Hi,
| 
| I've created a bridge using 2 interfaces and have a lot of messages as
| follows:
| 
| nov 12 15:30:22 localhost kernel: br0: received packet on enp0s3 with own
| address as source address
| nov 12 15:30:22 localhost kernel: br0: received packet on enp0s3 with own
| address as source address
| 
| And the operating systems is extremely slow
| 
| Interfaces files :
| 
| [root at localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-*
| DEVICE=br0
| TYPE=Bridge
| BOOTPROTO=dhcp
| ONBOOT=yes
| #STP=on
| #DELAY=0
| NM_CONTROLLED=no
| DEVICE=enp0s3
| #HWADDR=08:00:27:AB:1D:E6
| BOOTPROTO=none
| ONBOOT=yes
| NM_CONTROLLED=no
| BRIDGE=br0
| 
| DEVICE=enp0s8
| HWADDR=08:00:27:A3:98:E6
| BOOTPROTO=none
| ONBOOT=yes
| NM_CONTROLLED=no
| BRIDGE=br0
| DEVICE=lo
| TYPE=loopback
| IPADDR=127.0.0.1
| NETMASK=255.0.0.0
| NETWORK=127.0.0.0
| # If you're having problems with gated making 127.0.0.0/8 a martian,
| # you can change this to something else (255.255.255.255, for example)
| BROADCAST=127.255.255.255
| ONBOOT=yes
| NAME=loopback
| 
| I've disabled NetworkManager, but problem persists.
| 
| System is:
| 
| [root at localhost ~]# uname -a
| Linux localhost 3.10.0-123.el7.x86_64 #1 SMP Mon Jun 30 12:09:22 UTC 2014
| x86_64 x86_64 x86_64 GNU/Linux
| 
| And is virtualized on VirtualBox
| 
| Please could you help me to fix it?
| 
| Thanks in advance!
| 
| --
| --
| Sergio Belkin
| LPIC-2 Certified - http://www.lpi.org

You have a bridge with two interfaces on the same lan?  You're likely creating the topology loop with this configuration.  What is it that you're attempting to do here?


-- 
James A. Peltier
IT Services - Research Computing Group
Simon Fraser University - Burnaby Campus
Phone   : 604-365-6432
Fax     : 778-782-3045
E-Mail  : jpeltier at sfu.ca
Website : http://www.sfu.ca/itservices
Twitter : @sfu_rcg
Powering Engagement Through Technology