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QNX Community VMware® Project/Discussion/General/Two ethernet interfaces configured with same MAC address./List of Posts
Forum Topic - Two ethernet interfaces configured with same MAC address.: (4 Items)
   
Update
Senthil K
11/20/2009 7:37 AM
post42304
Two ethernet interfaces configured with same MAC address.   
Hi,

I have a PC (PC-1) which uses VMware with QNX as Guest OS. In this I have two physical ethernet interfaces.

The physical interfaces are mapped to QNX OS en0 and en1.

Now I am configuring the MAC address for both ethernet interfaces with the same MAC address. I have used the manual 
configuation option in the VMware for this.

I  have connected one ethernet interface to another PC (PC-2).

I am trying to ping from PC-2 to PC-1. I am not getting any response.

If I do the same steps in QNX - OS (instead of VMware PC-1), ping is successful.

Can anyone help to resolve this issue.
Mario Charest
11/20/2009 8:30 AM
post42305
RE: Two ethernet interfaces configured with same MAC address.   

> -----Original Message-----
> From: Senthil K [mailto:community-noreply@qnx.com]
> Sent: Friday, November 20, 2009 7:37 AM
> To: general-vmware
> Subject: Two ethernet interfaces configured with same MAC address.
> 
> Hi,
> 
> I have a PC (PC-1) which uses VMware with QNX as Guest OS. In this I
> have two physical ethernet interfaces.
> 
> The physical interfaces are mapped to QNX OS en0 and en1.
> 
> Now I am configuring the MAC address for both ethernet interfaces with
> the same MAC address. I have used the manual configuation option in the
> VMware for this.
> 
> I  have connected one ethernet interface to another PC (PC-2).
> 
> I am trying to ping from PC-2 to PC-1. I am not getting any response.
> 
> If I do the same steps in QNX - OS (instead of VMware PC-1), ping is
> successful.
> 
> Can anyone help to resolve this issue.

You cannot use two identical MAC addresses, that breaks the network.

> 
> 
> 
> _______________________________________________
> 
> General
> http://community.qnx.com/sf/go/post42304
>
Senthil K
11/30/2009 5:52 AM
post42822
Re: RE: Two ethernet interfaces configured with same MAC address.   
Hi,

I am using two ethernet interfaces for some local testing only. They are connected to two individual pcs. Each ethernet 
interface is assigned with local IP addresses which are in different network.

My connectivity is like this: 

              |----------En0 --------------> connected to PC1 (IP - 10.1.1.1) 
QNX PC |
             | ---------En1 --------------> connected to PC2 (IP - 172.30.14.1)
              
This QNX OS is installed in VmWare. This has two ethernet cards. Interface names are En0 and En1. En0 and En1 are 
configured with a same MAC address for e.g MAC: 00:04:01:00:00:10.

En0 has IP address 10.1.1.2 which is connected to PC1 IP address 10.1.1.1
En1 has IP address 172.30.14.2 which is connected to PC2 IP address 172.30.14.1

With this setup I am able to send packets outside. But I am not receiving any packets on En0 or En1.

Please suggest some way to get this setup working.
Mario Charest
11/30/2009 8:45 AM
post42834
RE: RE: Two ethernet interfaces configured with same MAC address.   

> -----Original Message-----
> From: Senthil K [mailto:community-noreply@qnx.com]
> Sent: Monday, November 30, 2009 5:52 AM
> To: general-vmware
> Subject: Re: RE: Two ethernet interfaces configured with same MAC
> address.
> 
> Hi,
> 
> I am using two ethernet interfaces for some local testing only. They
> are connected to two individual pcs. Each ethernet interface is
> assigned with local IP addresses which are in different network.
> 
> My connectivity is like this:
> 
>               |----------En0 --------------> connected to PC1 (IP -
> 10.1.1.1)
> QNX PC |
>              | ---------En1 --------------> connected to PC2 (IP -
> 172.30.14.1)
> 
> This QNX OS is installed in VmWare. This has two ethernet cards.
> Interface names are En0 and En1. En0 and En1 are configured with a same
> MAC address for e.g MAC: 00:04:01:00:00:10.

You cannot have a network with non unique MAC address. Your network is broken.

> 
> En0 has IP address 10.1.1.2 which is connected to PC1 IP address
> 10.1.1.1
> En1 has IP address 172.30.14.2 which is connected to PC2 IP address
> 172.30.14.1
> 
> With this setup I am able to send packets outside. But I am not
> receiving any packets on En0 or En1.
> 
> Please suggest some way to get this setup working.
> 
> 
> 
> _______________________________________________
> 
> General
> http://community.qnx.com/sf/go/post42822
>

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