Re: ARP interfering with Etherboot TFTP?

On Mon, Mar 06, 2006 at 03:52:39PM +0000, John Connett/ENG/UK/Plasmon wrote:
>  ...
>  7445 127.717 10.4.2.152 10.4.2.52   TFTP  Data Packet, Block: 3655
>  7446 127.718 10.4.2.52  10.4.2.152  TFTP  Acknowledgement, Block: 3655
>  7447 127.718 10.4.2.152 10.4.2.52   TFTP  Data Packet, Block: 3656


nothing for 1.6 seconds 

>  7448 129.343 10.4.2.152 10.4.2.52   ARP   Who has 10.4.2.52?  Tell 10.4.2.152
>  7449 129.344 10.4.2.52  10.4.2.152  ARP   10.4.2.52 is at 00:0a:e4:00:c1:97


almost 2 seconds silence

>  7450 131.319 10.4.2.52  10.4.2.152  TFTP  Acknowledgement, Block: 3655

a _resend_ of the acknowledgement of Block 3655

>  7451 131.319 10.4.2.152 10.4.2.52   TFTP  Data Packet, Block: 3656

servers send for a _second time_ block 3656

>  7452 131.321 10.4.2.52  10.4.2.152  TFTP  Acknowledgement, Block: 3656
>  7453 131.321 10.4.2.152 10.4.2.52   TFTP  Data Packet, Block: 3657
>  7454 131.322 10.4.2.52  10.4.2.152  TFTP  Acknowledgement, Block: 3657
>  7455 131.322 10.4.2.152 10.4.2.52   TFTP  Data Packet, Block: 3658
>  ...

No delays, no retransmits. ( For those few packets )

> 28450 137.317 10.4.2.52  10.4.2.152  TFTP  Acknowledgement, Block: 14155
> 28451 137.317 10.4.2.152 10.4.2.52   TFTP  Data Packet, Block: 14156
> 28452 137.317 10.4.2.52  Broadcast   ARP   Who has 10.4.2.52?  Gratuitous ARP
> 28453 137.317 10.4.2.52  10.4.2.152  TFTP  Acknowledgement, Block: 14156
> 28454 137.317 10.4.2.152 10.4.2.52   TFTP  Data Packet, Block: 14157

Nothing special in the TFTP transfer. (the Gratuitous ARP is indeed odd)



I think we are pestered by some network hick-ups.
(collissions, flacky network switches or what ever)


Geert Stappers


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