Actually there is no packet going to int2. When in L3 mode, dpdk-input does not get any packet from int2. But just by changing it to L2 mode, dpdk-input gets exactly the same packet from int2 as from int1.
At dpdk-input, whether the interface is L2 or L3 should not affect the packet it gets. The check (e.g., ethernet-input) is after the dpdk-input. That's why I think it may be a bug. (e.g., somehow the memory of the frame at int1 and int2 are the same, so the dpdk-input puts the same packet to the next node twice. Just my guess, may be wrong). On Tue, Dec 5, 2017 at 4:05 AM, Neale Ranns (nranns) <nra...@cisco.com> wrote: > > > By ‘receive’ in this context, I assume you mean it accepts the packet that > has arrived on the wire. As opposed to the fact that the packet did indeed > arrive at that interface - clearly it is not the receiving device that > influences which packets arrive at which interfaces. > > > > So, let me bounce this back to you. Under what circumstances do L3 and L2 > ports accept a packet? > > > > Regards, > > neale > > > > *From: *<vpp-dev-boun...@lists.fd.io> on behalf of Yuliang Li < > yuliang...@yale.edu> > *Date: *Tuesday, 5 December 2017 at 04:55 > *To: *"vpp-dev@lists.fd.io" <vpp-dev@lists.fd.io> > *Subject: *[vpp-dev] Bug? > > > > Hi, > > > > I am using vpp v18.01-rc0~160-ge13c799 (show version in vppctl). I feel > I find a bug. > > > > I have two physical interfaces TenGigabitEthernet5/0/0 (int1) > and TenGigabitEthernet5/0/1 (int2). > > > > Normally, if I send traffic (from another server) to int1, I expect int2 > should NOT receive the traffic. This is true when int2 is in l3 mode. > > > > However, if I set int2 to l2 mode (e.g., set interface l2 bridge > TenGigabitEthernet5/0/1 2), int2 will receive the same traffic as int1 > does. This problem happens no matter int1 is in l2 or l3 mode. I use the > trace to confirm that int2 receives the same traffic as int1 does. > > > > Does anyone know this problem? > > > > Thanks, > > -- > > Yuliang Li > > PhD student > > Department of Computer Science > > Yale University > > -- Yuliang Li PhD student Department of Computer Science Yale University
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