?
Solved

not output on the show arp command

Posted on 2016-10-24
5
Medium Priority
?
116 Views
Last Modified: 2016-11-08
From my layer 3 Cisco switch, I could ping 10.10.10.1 but when I did show arp, I could see a lot IP addresses, except my 10.10.10.1. Why is that? Thanks
0
Comment
Question by:leblanc
5 Comments
 
LVL 10

Assisted Solution

by:Antzs
Antzs earned 500 total points
ID: 41857893
Is it on a different network segment separated by ACL or a Firewall?
0
 
LVL 1

Author Comment

by:leblanc
ID: 41857950
Even though it is on a different segment, I should still see it in the ARP table, shouldn't I?
0
 
LVL 62

Accepted Solution

by:
gheist earned 1000 total points
ID: 41858171
Nope.
0
 
LVL 10

Assisted Solution

by:Antzs
Antzs earned 500 total points
ID: 41859644
0
 
LVL 47

Assisted Solution

by:Craig Beck
Craig Beck earned 500 total points
ID: 41867522
ARP is a layer-2 protocol.  If you ping an address that's on a different subnet you won't see the MAC address of the device.  You'll only see MAC addresses of devices on your layer-2 segment.
0

Featured Post

Vote for the Most Valuable Expert

It’s time to recognize experts that go above and beyond with helpful solutions and engagement on site. Choose from the top experts in the Hall of Fame or on the right rail of your favorite topic page. Look for the blue “Nominate” button on their profile to vote.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Make the most of your online learning experience.
This article is in regards to the Cisco QSFP-4SFP10G-CU1M cables, which are designed to uplink/downlink 40GB ports to 10GB SFP ports. I recently experienced this and found very little configuration documentation on how these are supposed to be confi…
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…

850 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question