[Bridge] 1 system with 3 bridges

[Bridge] 1 system with 3 bridges

[ro0ot]

Hi all,

I have one bridge system (used for controlling bandwidth) connected to 
three different DSL ISP provider.  I have the following setup below: -

+-------------+
|   br0             |
|   -> eth1       | -> DSL_1
|   -> eth2       |
+-------------+
|   br1             |
|   -> eth3       | -> DSL_2
|   -> eth4       |
+-------------+
|   br2             |
|   -> eth5       | -> DSL_3
|   -> eth6       |
+-------------+

br0 has eth1 and eth2; br0 has no ip address

br1 has eth3 and eth4; br0 has no ip address

br2 has eth5 and eth6; br0 has no ip address

The traffic of DSL_1 ISP will pass thru br0.  The traffic of DSL_2 ISP 
will pass thru br1.  The traffic of DSL_3 ISP will pass thru br2.

I have a question.  Is it ok I do it as above in 1 system with 3 bridges 
or separate it to 3 system with each system have their own bridge?

Regards,
ro0ot

Re: [Bridge] 1 system with 3 bridges

[Stephen Hemminger]

ro0ot wrote:

> Hi all,
>
> I have one bridge system (used for controlling bandwidth) connected to 
> three different DSL ISP provider.  I have the following setup below: -
>
> +-------------+
> |   br0             |
> |   -> eth1       | -> DSL_1
> |   -> eth2       |
> +-------------+
> |   br1             |
> |   -> eth3       | -> DSL_2
> |   -> eth4       |
> +-------------+
> |   br2             |
> |   -> eth5       | -> DSL_3
> |   -> eth6       |
> +-------------+
>
> br0 has eth1 and eth2; br0 has no ip address
>
> br1 has eth3 and eth4; br0 has no ip address
>
> br2 has eth5 and eth6; br0 has no ip address
>
> The traffic of DSL_1 ISP will pass thru br0.  The traffic of DSL_2 ISP 
> will pass thru br1.  The traffic of DSL_3 ISP will pass thru br2.
>
> I have a question.  Is it ok I do it as above in 1 system with 3 
> bridges or separate it to 3 system with each system have their own 
> bridge?
>
> Regards,
> ro0ot
>
One system with three bridges will work fine. The only advantage of 
separate systems would be the increased CPU and bandwidth available. As 
long as you are using a fast enough processor and memory, you should be 
fine. A normal 32 bit/33 Mhz PCI bus peaks at about 600 Mbits/sec. 
Double that for 64 bit and double again for 66 Mhz (PCI-X). PCI-express, 
not sure yet.

Re: [Bridge] 1 system with 3 bridges

[ro0ot]

My system specifications is as below: -

Intel Pentium 4 2.4GHz
1024MB DDR RAM

eth1 and eth2 is National Semiconductor
eth3 and eth4 is Realtek 8139
eth5 and eth6 is Via-Rhine



Stephen Hemminger wrote:

> ro0ot wrote:
>
>> Hi all,
>>
>> I have one bridge system (used for controlling bandwidth) connected 
>> to three different DSL ISP provider.  I have the following setup 
>> below: -
>>
>> +-------------+
>> |   br0             |
>> |   -> eth1       | -> DSL_1
>> |   -> eth2       |
>> +-------------+
>> |   br1             |
>> |   -> eth3       | -> DSL_2
>> |   -> eth4       |
>> +-------------+
>> |   br2             |
>> |   -> eth5       | -> DSL_3
>> |   -> eth6       |
>> +-------------+
>>
>> br0 has eth1 and eth2; br0 has no ip address
>>
>> br1 has eth3 and eth4; br0 has no ip address
>>
>> br2 has eth5 and eth6; br0 has no ip address
>>
>> The traffic of DSL_1 ISP will pass thru br0.  The traffic of DSL_2 
>> ISP will pass thru br1.  The traffic of DSL_3 ISP will pass thru br2.
>>
>> I have a question.  Is it ok I do it as above in 1 system with 3 
>> bridges or separate it to 3 system with each system have their own 
>> bridge?
>>
>> Regards,
>> ro0ot
>>
> One system with three bridges will work fine. The only advantage of 
> separate systems would be the increased CPU and bandwidth available. 
> As long as you are using a fast enough processor and memory, you 
> should be fine. A normal 32 bit/33 Mhz PCI bus peaks at about 600 
> Mbits/sec. Double that for 64 bit and double again for 66 Mhz (PCI-X). 
> PCI-express, not sure yet.
>
>