RE: Lab Tips

From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Mar 18 2004 - 19:39:05 GMT-3


        I have seen issues with this before where a soft-reconfig clear or a
route-refresh clear will not apply a new BGP policy but a hard reset will.
You can just attribute this to the buggy nature of IOS I suppose. When in
doubt, reload ;)

HTH,

Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com

Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705

> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Richard Dumoulin
> Sent: Thursday, March 18, 2004 4:05 PM
> To: Packet Man; ccielab@groupstudy.com
> Subject: RE: Lab Tips
>
> Hi Packet Man,
>
> Why this ? Reset BGP sessions using hard reset rather than soft reset.
>
> -----Mensaje original-----
> De: Packet Man [mailto:ccie2b@hotmail.com]
> Enviado el: jueves, 18 de marzo de 2004 22:59
> Para: ccielab@groupstudy.com
> Asunto: Lab Tips
>
>
> Hi all,
>
> I've created a "Lab Tips" file of small items - factoids, reminders,
> suggestions, etc, I tend to forget. This is something I can refer to
> constantly when I'm doing practice labs or just have a few minutes to
> spare.
>
> Here's a snippet from my Tips file.
>
> BGP
> Hard code router-id
> Don't use loopbacks for ibgp peering unless explicitly required
> Look for nei ... next-hop-self requirement especially on F/R hub and
> ethernets
> Disable bgp client to client reflection when clients are fully meshed
> Turn off auto-sum & sync unless explicitly required
> Reset BGP sessions using hard reset rather than soft reset.
> Know how to config nei xxxx local-as in combo with RR.
> Know all ways to config dampening
>
> I'm sharing this with GS because I suspect many candidates might also have
> something like this. And, I thought that with all the great brain power
> among GS subscribers we could all help each other by adding tips to such a
> file.
>
> Here's my definition of what makes for a good tip.
>
> 1) A tip may not in any way violate the NDA
> 2) A good tip should be something that might be easily forgotten because
> it's not that often encountered or somehow different from the ordinary.
> For
>
> example, when configuring ISIS over frame relay, don't forget to enter
> the
> "fram map clns <dlci> broadcast" statement. For me, this is a good tip
> because I personally don't practice ISIS that often and I seem to almost
> always forget that command.
>
> 3) A good tip must be short and clear because the whole idea behind this
> file is to provide a quick reminder of various networking facts that can
> come in handy during the actual lab.
>
> 4) A good tip must should not waste time going into the "why" of the fact
> or
>
> all the various permutations. For that, anyone interested can research
> the
> "why" of the fact on their own.
>
> 5) A good tip for one person might not be at all useful to someone else.
> We
>
> each tend to remember and forget different things. But, for example, over
> time the BGP tips section may include 30 items and while I doubt all 30
> items will be useful to all people, I'm sure that 5 or 10 or 15 of the
> tips
> will be useful to many people - just that it won't be the same 5 or 10 or
> 15
>
> tips.
>
> 6) A good tip must be potentially relevant to a ccie R&S candidate.
> Therefore, I ask that Off Topic comments be submitted elsewhere - Let's
> keep
>
> posts with the subject "Lab Tips" focus on just that.
>
> It's my hope that over time, with the input of a lots of people here, this
> lab tips file will grow to include tips that cover every topic potentially
> on the R&S lab exam. And, that as a result, we can each add the most
> personally valuable tips from this group effort to our own lab tips file.
>
> Right now, my tips file has no entries for voice. So, I'd like to start
> off
>
> by asking people to submit their voice config tips. Of course, tips on any
> potential lab are also welcomed.
>
> Here are some other potential tips topics I hope people feel free to
> submit
> tips to.
>
> Redistribution
>
> ATM
>
> 3550
>
> OSPF
>
> NAT
>
> HSRP
>
> F/R
>
> ISDN
>
> QOS
>
> Multicast
>
> NTP
>
> Voice
>
> Eigrp
>
> Please add your tip under the appropriate heading and send back to GS.
>
> Hope this helps lots of people.
>
> Packet Man
>
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