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    SubjectRe: Network drivers that don't suspend on interface down
    On Wed, 20 Dec 2006 15:37:41 -0800
    Rick Jones <rick.jones2@hp.com> wrote:

    > > There are two different problems:
    > >
    > > 1) Behavior seems to be different depending on device driver
    > > author. We should document the expected semantics better.
    > >
    > > IMHO:
    > > When device is down, it should:
    > > a) use as few resources as possible:
    > > - not grab memory for buffers
    > > - not assign IRQ unless it could get one
    > > - turn off all power consumption possible
    > > b) allow setting parameters like speed/duplex/autonegotiation,
    > > ring buffers, ... with ethtool, and remember the state
    > > c) not accept data coming in, and drop packets queued
    >
    > What implications does c have for something like tcpdump?
    >
    > rick jones

    None, you can bring up the device without actually assigning an address to it.

    --
    Stephen Hemminger <shemminger@osdl.org>
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