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

[Danny Braniss]

> 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.
> 
I've had many problems lately, but none involved checksum nor the dhcpd
(btw, I assume that you are seeing bad checksum on the receiving server)
could you add a nic to your PE1750? 

danny


> 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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