Re: nic_bridge DHCP problem

[Alexander D. <do...@ra...>]

I confirm this problem.
Although I was using VMware, and it could only be reproduced on some physical machines, and worked perfectly on others. DHCP just didn't get through.

14.09.2012, в 16:38, Markus Partheymueller <ma...@kl...> написал(а):

> Hey folks,
> 
> I'm having some trouble with the nic_bridge provided. When using the
> nic_drv as single instance, everything works fine.
> 
> But when I replace it with the nic_bridge, the requests don't seem to
> make it through. In qemu's TCP dump, I recognized a difference
> regarding the DHCP broadcast:
> 
> 13:08:25.494579 IP (tos 0x0, ttl 64, id 5118, offset 0, flags [none],
> proto UDP (17), length 341)
>    0.0.0.0.68 > 255.255.255.255.67: [bad udp cksum 0x9134 -> 0xd233!]
> BOOTP/DHCP, Request from 02:02:02:02:02:02, length 313, xid
> 0x292e1940, Flags [Broadcast] (0x8000)
>          Client-Ethernet-Address 02:02:02:02:02:02
>          Vendor-rfc1048 Extensions
>            Magic Cookie 0x63825363
>            DHCP-Message Option 53, length 1: Discover
>            MSZ Option 57, length 2: 1500
>            Vendor-Class Option 60, length 42:
> "dhcpcd-5.2.7:Linux-3.5.0:i686:NOVA microHV"
>            Hostname Option 12, length 2: "vm"
>            Parameter-Request Option 55, length 15:
>              Subnet-Mask, Classless-Static-Route, Static-Route, Default-Gateway
>              Domain-Name-Server, Hostname, Domain-Name, MTU
>              BR, NTP, Lease-Time, Server-ID
>              RN, RB, Option 119
> 
> The bad checksum irritated me. When I used the nic_drv session, it
> worked (checksum OK, qemu's DHCP responds correctly with an IP
> address). Could there be a problem with the bridge itself or is it
> definitely my problem? Do you have example setups using the bridge
> that work?
> 
> Best,
> 
> Markus
> 
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