[dpdk-users] After changing Destination MAC address in dpdk packet not reaching to destination

[Stephen Hemminger]

On Tue, 5 Sep 2017 11:56:36 +0530
Sagar Singha <singha.sagar09 at gmail.com> wrote:

> Hi,
> 
> I am using VMXNET3 type VM .OS distro=UBUNTU14.04.
> My VM is having  4 core CPU
>                              4 GB RAM
> 
> In l2fwd application in dpdk source code after receiving the packet I am
> changing the Destination MAC address.
> 
> The below is my set UP:
> 
> 1.Pinging from one VM having IP:10.0.102.72;MAC ADDR: 00:0c:29:f2:a7:7e
> 
>  2.One VM from where I am running dpdk l2fwd application having three
> virtual interfaces: ens160(IP:10.0.102.166),
> ens192(IP:10.0.102.81),ens224(10.0.102.123)
> ens192 and ens224 I have binded with dpdk driver (igb_uio)
> 
> 3.Another one VM to which I want send the packet by changing the MAC
> address in dpdk application having IP:10.0.102.106;MAC ADDR:
> 00:50:56:a8:6a:d4
> 
>   The packet I can see in the dpdk application as==
>   source IP:10.0.102.72
>   Dest IP:10.0.102.81
> 
> Now before tx I am changing the dest mac addr for every packet  with
> 00:50:56:a8:6a:d4.
> So Ideally It should reach to the dest.
> 
> I am running tcpdump on the destination machine but there is no packet
> form 10.0.102.72
> from where I am pinging.
> 
> The command I am running to run the app:
> ./build/app/l2fwd -c 3 -n 2 -- -p3  --no-mac-updating
> 
> 
> Please any clue!!!Thanks in advance!!
> 

VMWare has host side MAC address filters which would block this by default.
There is some setting to allow guest to override MAC, but it has to be
configured on VSphere host side.