[138642] in North American Network Operators' Group
Re: ipv6 question
daemon@ATHENA.MIT.EDU (ann kok)
Fri Mar 11 14:15:42 2011
Date: Fri, 11 Mar 2011 11:15:36 -0800 (PST)
From: ann kok <oiyankok@yahoo.ca>
To: nanog@nanog.org
In-Reply-To: <1299730291.2109.119.camel@karl>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hi=0A=0AThen I won't use this ipv6 address 2001:db8:cafe:1111::12 for test=
=0A=0AAcutually, I have one in eth0 when I run ifconfig -a=0A=0A i=
net6 addr: fe80::20c:29ff:fe3c:92a1/64 Scope:Link=0A=0A=0Abut I also can't =
ping it=0A=0Aping6 fe80::20c:29ff:fe3c:92a1=0Aconnect: Invalid argument=0A=
=0A=0A=0Abut ping6 ::1 is fine=0A=0Aping6 ::1=0APING ::1(::1) 56 data bytes=
=0A64 bytes from ::1: icmp_seq=3D0 ttl=3D64 time=3D7.18 ms=0A64 bytes from =
::1: icmp_seq=3D1 ttl=3D64 time=3D0.050 ms=0A=0A=0A=0A--- On Wed, 3/9/11, K=
arl Auer <kauer@biplane.com.au> wrote:=0A=0A> From: Karl Auer <kauer@biplan=
e.com.au>=0A> Subject: Re: ipv6 question=0A> To: nanog@nanog.org=0A> Receiv=
ed: Wednesday, March 9, 2011, 11:11 PM=0A> On Thu, 2011-03-10 at 11:43 +110=
0,=0A> Mark Andrews wrote:=0A> > In message <1299711449.2109.98.camel@karl>=
, Karl=0A> Auer writes:=0A> > > On Wed, 2011-03-09 at 09:01 -0600, imNet=0A=
> Administrator wrote:=0A> > > > Where are you pinging it from? also, the=
=0A> 2001:db8::/32 prefix is used=0A> > > > for "documentation purposes" an=
d might be=0A> handled differently by the=0A> > > > TCP/IP stack.=0A> > > =
=0A> > > Works fine in Linux - I've been using it (in an=0A> isolated train=
ing room=0A> > > setup) for years.=0A> > > =0A> > > Regards, K.=0A> > =0A> =
> It is not a good idea to use the documentation prefix=0A> for anything=0A=
> > other than documentation.=A0 How hard is it to=0A> generate a ULA and u=
se=0A> > it?=0A> =0A> I suppose I took/take the view that it *is*, in a sen=
se,=0A> being used for=0A> documentation.=0A> =0A> The network is a trainin=
g network, isolated from the=0A> Internet, and used=0A> for demonstration p=
urposes. It's a good way to engrave the=0A> doco prefix=0A> in the students=
' minds. It also allows all the slides,=0A> exercises and=0A> other documen=
tation to use the documentation prefix and yet=0A> directly=0A> match the d=
emonstration network.=0A> =0A> ULA prefixes have little internal logic and =
are hard to=0A> remember. Not a=0A> problem in production, but just another=
barrier in a=0A> training=0A> environment. "2001:db8::/32" is very easy to=
remember (I=0A> guess that's=0A> the point) and easy to add easy-to-use su=
bnets into.=0A> =0A> However, I do appreciate that it's a bit of an edge ca=
se.=0A> In my training=0A> I specifically draw the students' attention to t=
his fact.=0A> =0A> Thanks, K.=0A> =0A> -- =0A> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~=
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~=0A> Karl Auer (kauer@biplane.co=
m.au)=A0=0A> =A0 =A0 =A0 =A0 =A0 =A0 =A0=0A> =A0=A0=A0+61-2-64957160 (h)=0A=
> http://www.biplane.com.au/kauer/=A0 =A0 =A0=0A> =A0 =A0 =A0 =A0 =A0=0A> =
=A0=A0=A0+61-428-957160 (mob)=0A> =0A> GPG fingerprint: DA41 51B1 1481 16E1=
F7E2 B2E9 3007 14ED=0A> 5736 F687=0A> Old fingerprint: B386 7819 B227 2961=
8301 C5A9 2EBC 754B=0A> CD97 0156=0A> =0A=0A
