Hi Jason, On Fri, Oct 16, 2015 at 1:07 PM, Jason Wang <[email protected]> wrote: > > > On 10/16/2015 01:15 PM, sai pavan wrote: >> +Peter >> >> Hi Jason, >> >> On Thu, Oct 15, 2015 at 2:44 PM, Jason Wang <[email protected]> wrote: >>> >>> On 10/15/2015 02:36 PM, sai pavan wrote: >>>> Hi, >>>> >>>> I am debugging an issue, where through one of the nics I am not able >>>> to connect to dtcp. >>>> So to dig in deep, i was going thought net.c files, and ended-up >>>> understanding little. >>>> >>>> So can i know how does a netdev connects to nic. >>>> >>>> nd_table[] has some pointers for netdev devices. Where are this >>>> actually instantiated ? I am missing that part of the code. >>>> >>>> How do the netdevs and nic's have 1-1 connections. >>> You may want to have a look at set_netdev(). >> Thanks this helped to see more regarding netdev. >> >> one more question, there are 4 Ethernet Controllers in the soc im working on >> https://github.com/qemu/qemu/blob/master/hw/arm/xlnx-zynqmp.c#L223 >> >> Each having configure nic and netdev internally. But only one can >> automatically connect to dhcp. Each one is assigned default mac >> address, Do each of the mac needs to be pre-registered with internal >> dhcp.? > > I think this is because if you don't specify any net clients on cli, > qemu will use default network configuration that has a hub with two > ports, first ports is connected to a nic and second port were connected > to userspace network > (http://wiki.qemu.org/Documentation/Networking#User_Networking_.28SLIRP.29) > which implements dhcp. You can see the network topology through "info > networks" commands. > > E.g if you want to let all nics to be connected to the user networking, > you may want to use: > > -net nic -net nic -net nic -net nic -net user > > in your cli. Cool, This worked. Thanks !!
Another question, is a way we can connect a particular device to hub, not connecting all ? Thanks, Sai Pavan > >> >> Regards, >> Sai Pavan >> >>>> And if my SOC has more than 1 sysbus type ethernet chips. How can i >>>> connect each one of them from command line ? >>> You can do this by using hubport as nic's peer e.g: >>> >>> -netdev hubport,id=port0,hubid=hubid -device e1000,netdev=port0 >>> >>>> Regards, >>>> Sai Pavan >
