Need help about MAC protocol or interaction between two NICs.

Is there any way for a network device to ask a remote network device
to stop transmitting data and then maybe at a later time to ask it to
restart it. It needs to be done at Layer 2 and in such a way that the
connections of transport layer protocols are not torn down.

Also, I have been trying to use netif_stop_queue in acenic.c driver,
but it only stops the transmission of packets from upper layer buffers
to the NIC, but it does not stop the transmission of packets from
remote NIC.

Any help would be very appreciated.

Lenny wrote:

> Is there any way for a network device to ask a remote network device
> to stop transmitting data and then maybe at a later time to ask it to
> restart it. It needs to be done at Layer 2 and in such a way that the
> connections of transport layer protocols are not torn down.
>
> Also, I have been trying to use netif_stop_queue in acenic.c driver,
> but it only stops the transmission of packets from upper layer buffers
> to the NIC, but it does not stop the transmission of packets from
> remote NIC.
>
> Any help would be very appreciated.

TCP has a couple of methods, but I don't know of any at the ethernet level.

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