dhclient doing DISCOVER with bad IP checksum - bge (7.1 show stopper??)

[Jonathan Feally]

Can someone please confirm or rule out my issue with dhclient sending 
bad IP checksum packets. It would really suck if 7.1 was released with a 
broken DHCP client.

Jonathan Feally wrote:
> Sorry for the cross-post, but this could be either lists problem.
>
> I have 2 boxes running 7-STABLE as of 20081130, both i386 SMP. One is 
> running ISC DHCPD 3.0.x from recent ports, and the other dhclient from 
> make world.
>
> The server is refusing to answer the DISCOVER request, as it thinks 
> the IP checksum is wrong, which tcpdump also confirms. Other DHCP 
> clients are working fine on this network, so I do not believe it to be 
> the network, server or dhcpd.
>
> Server is running a 2 Port Intel card - em driver.
>
> Client is a Dell PE1750 with 2 onboard NIC's - bge driver.
>
> I have tried turning off both RXCSUM and TXCSUM on both the client and 
> server machines with no luck. I also tried the second NIC on the 
> server with the same result.
>
> This setup was working just a couple of weeks ago, and the only thing 
> that has changed is updating the src for a make world. PXE booting 
> this server does result in an IP being issued, so it is pointing 
> towards something new/changed in 7-STABLE.
>
> I have attached a 3 packet dump of the DISCOVER requests.
>
> Can anybody shed some light on this for me?
>
> Thanks, -Jon
>
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