Go CCIE Go!! - A Cisco Certified Internetwork Expert

Hi Ahmed,
For mobile lab, Cisco charge (US$1,750) and must be made 90 days before the exam date to hold your reservation.
Please visit https://cisco.hosted.jivesoftware.com/docs/DOC-3224
Rgd, Cyyap
—–Original Message—– From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Ahmed Ibrahim Sent: 21 November 2008 9:35 To: ccielab@groupstudy.com Subject: Mobile Lab comes to Nigeria
Hello GS,
Just wanna know if any CCIE candidates from or […]

Yes, i confirm that behavior. I still don’t know why this is happening. It’s not the Bug i mentioned, must be something else. Basically we can say that “match mpls experimental topmost” does not work when “debug mpls packets” is enabled. This on a 3725 running 12.4M (i tried 12.4.23 and the problem is the […]

Hello GS,
Just wanna know if any CCIE candidates from or living in Nigeria booked a seat on the CCIE train making its way to Lagos next year (March 9 - 13).
And to anyone who can answer, Does Cisco charge higher for an exam at a mobile lab than for one at a fixed location?
Thanks.
[…]

The explanation is here: http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.2_44_se/configuration/guide/swethchl.html#wp1195432 “You should exercise care when using the on mode. This is a manual configuration, and ports on both ends of the EtherChannel must have a similar configuration. If the group is misconfigured, packet loss or spanning-tree loops can occur.”
Regards,
Antonio Soares, CCIE #18473 (R&S) amsoares@netcabo.pt
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From: […]

Hi Antonio,
Actually I was using your mini-scenario MPLS VPN QoS (Uniform Mode) and rewriting the precedence to EXP. The debug mpls packet will display it as CoS
CE1 - PE1 - P1 - P2 - P3- PE2- CE2
ping from CE1 (precedence set to 5), P1 marks it down to 3
In my output below […]

THANKS. You are right. The loop brought down the entire data center because of the loss of OSPF adjacency. I had to go there personally to break the loop…
I did found the problem. I removed the “channel-group 12 mode on” command on one switch, but forgot to remove it from the partner […]

Also if you are using only Cisco equipmente then configure UDLD or 80.3ah, it helps also to prevent loops.
Rodrigo
>—–Original Message—– >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On >Behalf Of ext Gutierrez, Rodrigo (NSN - CO/Santa Fe de Bogota) >Sent: Thursday, November 20, 2008 4:49 PM >To: Antonio Soares; Kim teu; Cisco certification >Subject: RE: Layer 2 […]

The couple of guys I know that have it its a get it and BS the rest of the requirements certification. I hope it is not like this on the whole as my experience is extremely anecdotal, but this is what I have seen.
On Thu, Nov 20, 2008 at 9:35 AM, Rik Guyler […]

Just use broadcast storm control to diminish the loop impact processor wise and to define the broadcast threshold allowed as per interface, in that way it will give you more time to track down the source of the problem or at least time enough to disconnect all secondary layer 2 redundancy, loops are lethal and […]

A STP Loop can stop everything in your network. I saw an entire data center going down in less than 1 second! When this is happening, the best to do is to break every existent L2 redundant link quickly. In some situations, if you don’t have physical access to the equipments, this is just not […]