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Visitor
Posts: 4
Registered: ‎02-07-2017
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Finding incomplete ARP entries

Hi,

 

"show arp" doesn't seem to list "incomplete" ARP entries - that is, actually saying that it couldn't find the MAC address for a given IP. This is contrary to the normal "arp" command in Linux and other environments.

 

Is there a different command to list ARP failures?

Distinguished Expert
Posts: 4,612
Registered: ‎03-30-2009
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Re: Finding incomplete ARP entries

The underlying OS for Junos is BSD if that helps and you can exist the the shell to see what is visible there.

 

In Junos your other path for mac information is the ethernet switching commands

 

show ethernet-switching statistics mac-learning

show ethernet-switching mac-learning-log

Steve Puluka BSEET
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Super Contributor
Posts: 107
Registered: ‎12-10-2013
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Re: Finding incomplete ARP entries

@ Pululka

Hi NO, going to shell does not help in this case

the CLI "show arp " and the shell command "arp -a" both show exactly the same information in the same format and both are NOT displaying incomplete arp entries.

(I tested  and verified it on QFX and MX)

 

regards

 

alexander

Recognized Expert
Posts: 368
Registered: ‎02-13-2011
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Re: Finding incomplete ARP entries

Does arp -v help?  I asume you are looking for host entries whose MAC is 00-00-00-00-00-00, unknown for associated IP, yes?

Visitor
Posts: 4
Registered: ‎02-07-2017
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Re: Finding incomplete ARP entries

arp -v gives version info:

% arp -v

$Id: arp.c 652546 2014-06-04 09:33:16Z abollineni $