C5 switch - No other entries in ARP table besides host

  • 0
  • 1
  • Question
  • Updated 3 years ago
  • Answered

Hello everyone,

I'm new to Enterasys/Extreme Networks equipment in general but I come from a Cisco background.  In all of the production C5 switches I have worked with so far at this site - when I do a "show arp" command, there is only the host entry in the table.  These C5's do not have routing enabled and are pretty bare bones.  CDP is enabled.  The C5's are connected to S1 routers via fiber.  Is there a reason for this?  I'm used to being able to see an arp table in most devices.  I feel like I'm fundamentally missing something here.

Firmware version is

The "sh mac" command works fine.

Photo of TMatuschak .

TMatuschak .

  • 80 Points 75 badge 2x thumb

Posted 3 years ago

  • 0
  • 1
Photo of Christoph


  • 1,842 Points 1k badge 2x thumb
Official Response
The secure stacks have two config modes:
  • switching mode
  • routing mode
The show arp command is executed in switching mode and just shows the ARP entries of devices the host is communicating with.

It you want so see all ARP entries of the router you have to switch into router mode:
show ip arp
Kind regards