netdev - Re: [iproute2] iproute2: Allow 'ip addr flush' to loop more than 10 times.

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Message-ID: <4C2A0B82.7020701@candelatech.com>
Date:	Tue, 29 Jun 2010 08:04:34 -0700
From:	Ben Greear <greearb@...delatech.com>
To:	Alexander Clouter <alex@...riz.org.uk>
CC:	netdev@...r.kernel.org
Subject: Re: [iproute2] iproute2:  Allow 'ip addr flush' to loop more than
 10 times.

On 06/29/2010 01:03 AM, Alexander Clouter wrote:
> greearb@...il.com wrote:
>>
>> The default remains at 10 for backwards compatibility.
>>
>> For instance:
>> # ip addr flush dev eth2
>> *** Flush remains incomplete after 10 rounds. ***
>> # ip -l 20 addr flush dev eth2
>> *** Flush remains incomplete after 20 rounds. ***
>> # ip -loops 0 addr flush dev eth2
>> #
>>
>> This is useful for getting rid of large numbers of IP
>> addresses in scripts.
>>
> Maybe I am missing a trick, but what is wrong with putting this trivial
> logic into the script:
>
> ip addr show ${DEV} | awk '/inet6? / { print $2 }' | xargs -I{} ip addr del '{}' dev ${DEV}

This isn't going to be fast if you have thousands of addresses.

> You can probably speed things up with '-P' too, '-P 2' gives me a huge
> huge speed up for the work I do with 'ip route'.

Where are you using the -P at?  It's not a supported option of 'ip'
as far as I can tell.

> Why the need to cram more functionality and options into iproute when
> it is something that can be pushed into the wrapper script?

Speed and ease of use.

Thanks,
Ben


-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com
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