RE: Encapsulation failed issue.

From: Scott Morris (smorris@internetworkexpert.com)
Date: Sat Oct 25 2008 - 17:47:05 ARST


Actually, in the future the IOS will be smart enough to determine whether
you are using authorized training materials to learn how to work on the
equipment. If you are not, they will automatically disable extra things
that you didn't pay licensing for.

J.k (mostly)

:)

Scott

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Bogdan Sass
Sent: Saturday, October 25, 2008 12:30 PM
To: Osamah Shaheen
Cc: naman sharma; Cisco certification
Subject: Re: Encapsulation failed issue.

Osamah Shaheen wrote:
> This is due miss leading study, can you plz use IE volume 1 so u can
> get advantage
>
    I fail to see how using a particular vendor's workbook would make the
router behave differently. I doubt that the router will say "oh, this guy is
using IE material - I will encapsulate the packets at layer
2 just for him!!" :P

> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of naman sharma
> Sent: 2008-10-25 17:19
> To: Cisco certification
> Subject: Encapsulation failed issue.
>
> Hi Group,
>
> I am facing a very strange problem my router is connected to Backbone
> through a switch. Router and Backbone are in Vlan 300. I was able to
> ping backbone from my router and then i configured RSPAN with Vlan 300
> as source after that i am not able to ping my backbone, i removed
> Monitor session commands and then also i am not able to ping.
>
> After doing debug ip packet i see encapsulation failed messages, to my
> understanding it is when the router is not able to resolve the Layer 2
> address, my concern is if we are trapped with such situation in real
> lab and we dont have access to Backbone hpow to make it up and
> running. I have reloaded the router and switch still not able to ping.
>
    Could you post some relevant configs/outputs from your router/switch?
Namely:

-router:

sh ip int brief
sh arp

-switch

sh int F0/X switchport (for the interfaces connected to the backbone and to
the router) sh run | i monitor

--
Bogdan Sass
CCAI,CCSP,JNCIA-ER,CCIE #22221 (RS)
Information Systems Security Professional "Curiosity was framed - ignorance
killed the cat"

Blogs and organic groups at http://www.ccie.net



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