Re: [Bridge] Error in Bridge Settings!!

[Etienne Pretorius <etiennep@kingsley.co.za>]

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Let me first explain that I have the same problem in my Ethernet bridge 
setup.

What I have determined, that there is a loop in my network but STP is 
preventing a packet broacast storm. I have switches instead of hubs but 
my primary bridge is broadcasting packets somehow, because when I unplug 
the primary's Ethernet from our internal network then those messages 
stop appearing. I am in the process of re-setting up that bridge so that 
*hopefully* I wont be seeing this message in future. I wander if it 
might be the HUBs you using.... they might be broadcasting any packet to 
all ports and so your bridge will receive its own packets back to it? 
Like I said - I have the same problem, but the setup still works and I 
am trying to remove loops in my network to see if that *really* is the 
cause to the error message.

Kind Regards
Etienne


Kirti S. Bajwa wrote:
>
> Hello Bridge List:
>
>  
>
> Please help a newbie!
>
>  
>
> I have setup two freshly installed CentOS 4.3 servers and have setup 
> redundant BRIDGE. My plan is to have the 'redundant' BRIDGE working 
> and then I will add 'Shorewall' Firewall to these two servers. On both 
> machines, I have included the following lines in '/etc/rc.local' so 
> that the BRIDGE will be ACTIVE after BOOT:
>
>  
>
> /etc/rc.local
>
> =========
>
> ** # ****Setup**** ****BRIDGE**** (****First**** ****Bridge****)**
>
> ** brctl   addbr       tibbr1**
>
> ** brctl   addif        tibbr1  eth0**
>
> ** brctl   addif        tibbr1  eth1**
>
> ** ifconfig   tibbr1  up**
>
> ** ifconfig   tibbr1  12.21.237.2   netmask   255.255.255.0**
>
> ** brctl   setageing   tibbr1  300**
>
> ** brctl   stp   tibbr1    on**
>
> ** brctl   setbridgeprio   tibbr1   100**
>
> ** brctl   setpathcost  tibbr1  eth0  100**
>
> ** brctl   setpathcost  tibbr1  eth1  100**
>
>  *reboot *
>
>  
>
> =========
>
> Similar lines are included in the second server except the bridge name 
> is 'tibbr2', IP addr is 12.21.237.4 & bridge & path costs are 200.
>
> MAC addresses on each server are as follows:
>
>  
>
> Server 1:
>
> eth0: 00:80:ad:16:f3:25
>
> eth1: 00:30:1b:38:c6:41
>
>  
>
> Server 2:
>
> eth0: 00:80:ad:16:e6:43
>
> eth1: 00:30:1b:38:c4:c9
>
>  
>
> PROBLEM:
>
> -------------
>
> When I boot one of the servers, I get the following errors:
>
>  
>
> eth1: received packet with own address as source address
>
> eth0: received packet with own address as source address
>
>  
>
> What are these errors & why they are appearing?
>
>  
>
> If I no-op (#) the following lines, the error disappear:
>
>  
>
> **# ifconfig   tibbr1  up**
>
> **# ifconfig   tibbr1  12.21.237.2   netmask   255.255.255.0**
>
>  
>
>  
>
> FYI, my current hardware setup is as follows:
>
>  
>
>                               T1 Line
>
>                                      |
>
>                       Cisco 26XX Router
>
>                                      |
>
>                                  HUB -----à HUB (Current Network)
>
>                                      |
>
>                ----------------------------
>
>                |                  eth0   
>              |                   
>
>              fw1                                   fw2             
>
>                |                  eth1                |
>
>               -----------------------------
>
>                                      |
>
>                                  HUB
>
>                                      |
>
>              (Future: additional Servers)
>
>  
>
> Please HELP! How can I fix the settings so the above listed PROBLEM is 
> resolved!!
>
>  
>
> Kirti
>
> ------------------------------------------------------------------------
>
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>   

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