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Date:      Wed, 11 Feb 2015 17:49:35 +0000
From:      Matt Churchyard <matt.churchyard@userve.net>
To:        Warren Block <wblock@wonkity.com>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>
Subject:   Re: Invalid subnet masks
Message-ID:  <CCB57DE0-24A4-4A06-ADB9-776B2000EE70@userve.net>
In-Reply-To: <alpine.BSF.2.11.1502111033140.4693@wonkity.com>
References:  <7e069c1946454793b1c7e0be988877c4@SERVER.ad.usd-group.com>, <alpine.BSF.2.11.1502111033140.4693@wonkity.com>

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> On 11 Feb 2015, at 17:38, Warren Block <wblock@wonkity.com> wrote:
> 
>> On Wed, 11 Feb 2015, Matt Churchyard wrote:
>> 
>> Just been helping someone on the forums who appears to have configured their network interface incorrectly. It looks like they've assigned 250.250.250.0 as the netmask.
>> I've tried assigning this netmask on a 10.1 machine and ifconfig happily accepts it.
> 
> As a tangent to that question, ifconfig(8) and the rc.conf settings do accept CIDR notation, which is both shorter and clearer than a dotted quad IP address and a separate netmask:
> 
> ifconfig em0 inet 192.168.1.1/24

Yeah I've been using that format in rc.conf for years. Quicker to type and looks tidy.


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