question into routing in ccnp r&s to mr/keith bogart

major133

hello my sir

 

iam into your lecture :-

33 - Basic Switch Configuration & Verification  Part 3

 

as you say into this example  that R2 will send broadcast arp msg to r1

 to know his own mac address

but into brodcast it`s FFFF.FFFF.FFFF

NOW AS YOU SEE INTO THIS EXAMPLE WHY R2 SEND 0000.0000.0000

 (AS YOU SEE INTO RED

MARK) NOT SEND IT FFFF.FFFF.FFFF? WHY HE`S DOING THAT?

 

ALSO INTO GRATITUOUS ARP PROTOCOL , YOU SAY THAT

 R2 SEND REPLY BROADCAST

MESSAG WITHOUT ANY REQ ? WHY R2 DO THAT?

 

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answer from mr/keith bogart

 

Hi Mohammed,
 
Your question is a great example of why I always recommend that people obtain actual packet captures (Sniffer traces) to really understand how protocols work.
 
In the output of “debug arp” that you’ve provided, I can understand how you’d mistakenly assume that the 0000.0000.0000 represents the destination MAC address of the ARP Request…but it does not.  That part of the output is actually showing you a field within the ARP packet called the, “Target MAC Address” field.
 
See below from an ARP Request packet capture:
 
 

tmanito

This is the second time I see a post that already has an answer from Keith Bogart, haha. 

peety

There's NO REASON to post an email exchange here. If you insist on conversing with Keith Bogart, do it in email. If you want group help, post it here and make it not specific to one person. Pick one method.

major133

IF MY POSTS ANNOYING YOU , DON`T READ IT

 

major133

IF MY POSTS ANNOYING YOU , DON`T READ IT

rriker

I would completely ignore him. He found me on FB and harasses me with countless number of questions. He asked me the same questions as above and put my response up against Keiths, like Keith's answer wasnt good enough or wanted a second opinion on it. 

Mohammed, if you have a question, ask the instructor. But don't post email threads here. I have to completely with Peety on this. 

On Thursday, December 3, 2015 2:56 PM, peety <[email protected]> wrote:

There's NO REASON to post an email exchange here. If you insist on conversing with Keith Bogart, do it in email. If you want group help, post it here and make it not specific to one person. Pick one method.

Internetwork Expert - The Industry Leader in CCIE Preparation

http://www.internetworkexpert.com

major133

this message to  man or woman that`s called  rriker

 

i never send any private emails to anyone except for ttwo persons

mr / brian mcgahan

mr / keith bogart

and only one who reply for me is mr / keith bogart

why you  lying to me and say what did not happen

be obvious don`t be Liar