Re: [vpp-dev] FW: ARP handling using VPP

Prerit Jain Fri, 04 Nov 2016 05:55:43 -0700

Hi Dave,

Thanks for the reply.

I want to know about the L3 mode handling when no MAC address is configured. In the VPP source code, the code to send the ARP request/ ARP response is present, however my question is that what will happen to that data packet.

Do VPP will queue it up till ARP query is completed. If yes, then can you let me know where it is getting queued up in the VPP source code?

Regards

Prerit

--------- Original Message ---------

Sender : Dave Barach (dbarach) <[email protected]>

Date : 2016-11-04 17:50 (GMT+5:30)

Title : RE: [vpp-dev] FW: ARP handling using VPP

To : Prerit Jain<[email protected]>, null<[email protected]>

Please clarify whether your question concerns bridging or routing.

If you configure interfaces in L2 mode - bridging - packets sent to unknown MAC addresses will be flooded across interfaces in the bridge.

In L3 mode, vpp sends ARP requests.

In neither case is the linux kernel involved.

Thanks… Dave

From: [email protected] [mailto:[email protected]] On Behalf Of Prerit Jain
Sent: Friday, November 4, 2016 6:59 AM
To: [email protected]
Subject: [vpp-dev] FW: ARP handling using VPP

Hi,

We are planning to use VPP with DPDK and trying to understand the processing of packet which is received for a destination for which no entry is present in L2 table. Does VPP will queue this packet and perform the ARP query to update its L2 table or it will forward the packet to kernel for ARP processing ??

Regards
Prerit

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