Re: Router on a stick

Dear Experts,

Resolved.

VLAN TAG OFFLOADING

Thanks,
Nadeem Anjum
>________________________________
> From: Tony Singh <mothafungla_at_gmail.com>
>To: Nadeem Anjum <nadeemkool_at_yahoo.com>
>Cc: Adam Booth
<adam.booth_at_gmail.com>; marc edwards <renorider_at_gmail.com>; Marko Milivojevic
<markom_at_ipexpert.com>; ccie groupstudy <ccielab_at_groupstudy.com>
>Sent:
Sunday, November 11, 2012 4:22 PM
>Subject: Re: Router on a stick
>
>There is
something to do with vlan tag offloading, search you will find a thread from
Bob
>
>--
>BR
>
>Tony
>
>Sent from my iPhone on 3
>
>On 11 Nov 2012, at 09:36,
Nadeem Anjum <nadeemkool_at_yahoo.com> wrote:
>
>> 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
>>>>>>
>>>>>>
>> _______________________________________________________________________
>>>>>>
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>>>>>>
>>
http://www.groupstudy.com/list/CCIELab.html
>>>>>
>>>>>
>>>>> Blogs and
organic
>> groups at http://www.ccie.net
>>>>>
>>>>>
>>
Received on Sun Nov 11 2012 - 12:40:12 ART