Buy or Renew
Buy or Renew
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
cancel
Start a conversation
411
Views
0
Helpful
1
Replies

ARP Corrupted on Catalyst switches

David Kondicz
Level 1
Level 1

‎02-03-2013 03:55 AM - edited ‎03-07-2019 11:28 AM

Have anyone solved this problem on catalyst switches. We have the same problem as in thread. Cant find the solution

http://www.gossamer-threads.com/lists/cisco/nsp/25435

after we  have connected a new site to one of our POP that there we are using for  switching 2960S Lan Base IOS, we have several times per day problems  with forwarding arp packets from this POP. I dont know why it is  havening, we just can see, that he IP/MAC of customer has been deleted  from Router ARP list for 300 sec.

I have checked the num of macs on this switch with show mac add count

The maximum was nolny 700 macs for VLAN 50. We have this issie only on this VLAN.

Thank you very much!

Labels:
0 Helpful
1 Reply 1

David Kondicz
Level 1
Level 1

‎02-03-2013 08:28 AM

I found something in this forum that this problem can be becouse we have unicast flood on this switch.

There was several threads abou tune ARP agging timers from 5 min to different value and CAM that have 4 hours.

What will be the best way to tune this switches for a lot of customers?

We have exactly 5min outages several times per day on Routers ARP table that is connectes to this switch.

Switch is 2960S

Cany anyone helps?

Thank you

BR

Dave

0 Helpful
Customers Also Viewed These Support Documents
Review Cisco Networking for a $25 gift card