About the usage of a dual port card

Jacques B. Siboni jacsib at lutecium.org
Thu Oct 4 02:20:25 EDT 2001


Can't you avoid to use the same broadcast ip for the 2 nics?

Jacques


Thomas Lorenzen wrote:
> 
>      Hi'
> 
>    In our linux cluster our server has a dual port intel
> nic. Both ports are configured to be on the same net as are
> all the clients of the cluster. The clients boot as diskless
> clients using the server.
> 
>    My question is, if there is a way to make a specific
> interface, to which a packet comes, also answer this
> request. What happens at the moment is, that if one pings
> eth2, then eth1 answers, and in general eth1 answers all
> requests unless this line is saturated, in which case eth2
> takes over. This is immediately seen from the output of RX
> and TX records below.
> 
>    Below I present the relevant output of ifconfig.
> 
> eth1      Link encap:Ethernet  HWaddr 00:03:47:3B:27:EE
>           inet addr:192.168.200.100  Bcast:192.168.200.255  Mask:255.255.255.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:399607 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:1070472 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:100
>           Interrupt:19 Base address:0x4000
> eth2      Link encap:Ethernet  HWaddr 00:03:47:3B:27:EF
>           inet addr:192.168.200.200  Bcast:192.168.200.255  Mask:255.255.255.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:142634 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:104 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:100
>           Interrupt:16 Base address:0x6000
> 
>    Below I present the relevant output of route.
> 
> 192.168.200.0   *               255.255.255.0   U     0 0 0 eth1
> 192.168.200.0   *               255.255.255.0   U     0 0 0 eth2
> 
>    In brief I would like, that if I contact an interface
> ethX using ping, say, then that particular interface ethX
> should also answer the request. Would anybody know of the
> possibility of doing so and what is in that case the trick
> to do.
> 
>    Thanks for any help in advance.
> 
>    Best Regards.
> 
>      Thomas.

-- 
Dr. Jacques B. Siboni mailto:jacsib at Lutecium.org
8 pass. Charles Albert, F75018 Paris, France
Tel. & Fax: 33 (0) 1 42 28 76 78
Home Page: http://www.lutecium.org/jacsib/

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