Re: Router on a stick

Dear Experts,

After changing OS of dynamips/dynagen server from Ubuntu to
Centos, "Router on a stick" is working perfectly.

What could be possible
problem with ubuntu server.

Thanks,
Nadeem Anjum
>________________________________
> From: Adam Booth <adam.booth_at_gmail.com>
>To: marc edwards <renorider_at_gmail.com>
>Cc: Marko Milivojevic
<markom_at_ipexpert.com>; M Nadeem Anjum <nadeemkool_at_yahoo.com>; ccie groupstudy
<ccielab_at_groupstudy.com>
>Sent: Friday, November 9, 2012 6:19 AM
>Subject:
Re: Router on a stick
>
>Hi,
>
>Looking at the breakout switch config
fragment posted, l2protocol
>tunnelling was enabled only on the real switch
facing interface (fa0/9)
>anyway with nothing on fa0/48, so possible
CDP/VTP/STP frames are being
>encapsulated from SW2 Fa0/6 but not doing
anything useful since there's no
>other end to attempt to encap/de-encap those
frames.
>
>L2protocol tunnelling through the breakout switch wont do anything
for
>Nadeem anyway (platform limitation) but it would be quite helpful if it
>worked to enable his routers to see the "real switches" via STP/CDP as
>directly adjacent devices for some labs. The 3550/3560 don't support
>l2protocol tunelling on trunk interfaces (Fa0/48 facing the dynamips box)
>but I believe the 3750 does.
>
>Cheers.
>Adam
>
>On Fri, Nov 9, 2012 at 3:39
AM, marc edwards <renorider_at_gmail.com> wrote:
>
>> First off, you don't need
to l2tunnel protocol anywhere to do Q in Q.
>>
>> Second, you need to increase
the system mtu on switches for additional
>> dot1q frame size
>>
>> Third,
(with relation to Q in Q)
>>
>> access ports need ONLY this
>>
>> switchport
access vlan 109
>> switchport mode dot1q-tunnel
>>
>>
>> trunk between
switches only require that the vlan is allowed. or
>> create access ports on
same vlan between switches.
>>
>> HTH
>>
>> Marc
>>
>>
>>
>> On Thu, Nov 8,
2012 at 7:51 AM, Marko Milivojevic <markom_at_ipexpert.com>
>> wrote:
>> > What
happened when you tried?
>> >
>> > --
>> > Marko Milivojevic - CCIE #18427 (SP
R&S)
>> > Senior CCIE Instructor - IPexpert
>> >
>> > On Thu, Nov 8, 2012 at
1:40 AM, M Nadeem Anjum <nadeemkool_at_yahoo.com>
>> wrote:
>> >> Dear Experts,
>> >>
>> >> Can I perform "Router on a Stick" scenario using Dynamips/Dynagen
>> Q-in-Q configuration using 4 real switches and 1 breakout switch.
>> >>
>>
>> All switches are c3550.
>> >>
>> >> Thanks,
>> >> Nadeem Anjum
>> >>
>> >>
>> >> Blogs and organic groups at http://www.ccie.net
>> >>
>> >>
Received on Sun Nov 11 2012 - 01:36:39 ART