From: Dave Bregman (DBregman@Houstons.com)
Date: Wed May 18 2005 - 17:46:29 GMT-3
Be careful enabling 'ip cef' on all your routers in the lab. I've heard
a rumor that sometimes lab questions might have "You should not enable
CEF..." in them. There are some functions that require CEF and they
could be pointing you to a different solution. I'm guessing that if you
enabled CEF and the question specifically said not to, even if you
didn't use the function that required CEF, they may mark it wrong. Just
my $0.02
Dave Bregman CCIE #14626
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> Behalf Of gladston@br.ibm.com
> Sent: Wednesday, May 18, 2005 1:08 PM
> To: ccielab@groupstudy.com
> Subject: Re: RE: IOS bug ????
>
>
> Hi Tim,
>
> I will try this:
>
> ===============
> 2. In the lab, do people think it's a good idea to disable
> route-caching
> unless explicitly forbidden? Why yes or no?
> ===============
>
> I don't think it is a good idea to disable route-caching.
> Just if there is a task that requires it, as load-balancing
> per-packet.
> If doing this will take out our points, that is a mistery.
> Maybe a direct question to Cisco CCIE group could help.
>
> ============
> 3. I always add the command, ip cef, to every router just so
> I don't have
> to remember what features require this enabled. What do
> people think of
> this?
> =============
>
> My opinion is that it is a good idea to use ip cef. I can't
> belive Proctors will take any point out because of this.
>
> ================
> 4. If I'm having reachability problems in the lab and I'm
> highly confident
> my config's are correct, I typically resort to rebooting the
> routers to see
> if that fixes the problem and often it does. Of course, I'm
> reluctant to
> reboot the rtr's because it takes so long. Given the above
> experience, does
> the GS community think it wise to first disable route-cache and/or cef
> before resorting to rebooting rtr's?
> ===============
>
> Rebooting the routers should be the last option.
> Are you studying using 12.2T? Do not loose your time learning
> bugs on other IOS. There is enough bugs on 12.2T, and it
> would be good to be familiar with its behavior.
>
> Today I was studying advertise-map. When I changed the
> access-list called by the route-map, it only worked after
> using 'clear ip bgp *'. 'clear ip bgp * soft' does not work.
> That is the kind of thing that take time. And we want to
> avoid it as much as possible.
>
> Good Luck.
>
> Don't let the IOS get you crazy :)
> It tries to do so.
>
> ______________________________________________________________
> _________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Fri Jun 03 2005 - 10:11:58 GMT-3