Date: Tue, 20 Jan 2009 12:20:02 GMT From: "Remko Lodder" <remko@elvandar.org> To: freebsd-bugs@FreeBSD.org Subject: Re: conf/130776: ip addresses like 10.1.1.1 with subnet mask 255.0.0.0 makes the box unreachable Message-ID: <200901201220.n0KCK2Yr081214@freefall.freebsd.org>
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The following reply was made to PR conf/130776; it has been noted by GNATS.
From: "Remko Lodder" <remko@elvandar.org>
To: "Manjunath Tata" <manjut@juniper.net>
Cc: freebsd-gnats-submit@freebsd.org
Subject: Re: conf/130776: ip addresses like 10.1.1.1 with subnet mask
255.0.0.0 makes the box unreachable
Date: Tue, 20 Jan 2009 13:17:58 +0100 (CET)
Dear Manjunath,
On Tue, January 20, 2009 12:10 pm, Manjunath Tata wrote:
>
> bng-dlsw-bsd1# uname -a
> FreeBSD bng-dlsw-bsd1.englab.juniper.net 4.11-RELEASE FreeBSD 4.11-RELEASE
> #0: Fri Jan 21 17:21:22 GMT 2005
Please note that 4.x is no longer supported, so if this is 4.x specific,
it will not be resolved ...
> root@perseus.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
>
>>Description:
> When an ip address in the 10 network i.e., say 10.1.1.1 with subnet mask
> 255.0.0.0 makes the box unreachable.
> The same doesn't happen with 11,12,13 and so on networks.
> But, when i try to configure an ip address like "ifconfig em1 10.0.56.141
> netmask 255.0.0.0" works fine and the link(em1 here) is up with the
> address.
>
Sure, so you have configured an interface (em0) with a 10.x network and
you configure the netmask to match a /A (/8, /255.0.0.0) range, this is a
very very big range, which could make sure that the gateway that you
normally use to reach the device, becomes unreachable (different broadcast
address and things like that).
Can you tell us more specifics about the "reachability" you need to have?
How is the router configured through which you want to reach the box? Is
em1 attached to the same network? or did you switch cables to get this
far?
Please let me know,
Best regards,
Remko
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