Controller Based WLANs

Why does ARP entry for client corrupt to controller mac-address ?
Q:

Why does ARP entry for client corrupt to controller mac-address ?



A:

This is an expected behavior when "ip nat pool" is configured on the controller. A NAT pool of IP addresses should be a unique IP address and should not belong to any client/host.


Example:

Before configuring NAT pool:
=======================

Client IP : 10.13.106.252
Client MAC : 00:18:DE:B2:52:03
Controller MAC: 00:0B:86:03:D6:00

(Aruba6000) (config) #show arp

Protocol        Address         Hardware Address        Interface
Internet        10.13.106.252   00:18:DE:B2:52:03       vlan1


After configuring NAT pool:
=======================

(Aruba6000) (config) #ip nat pool nat-pool 10.13.106.250 10.13.106.252 10.13.106.222
(Aruba6000) (config) #show ip nat pool

NAT Pools
---------
Name      Start IP       End IP         DNAT IP
----      --------       ------         -------
nat-pool  10.13.106.250  10.13.106.252  10.13.106.222

(Aruba6000) (config) #show arp

Protocol        Address         Hardware Address        Interface
Internet        10.13.106.252   00:0B:86:03:D6:00       vlan1

Version history
Revision #:
2 of 2
Last update:
‎02-23-2017 01:38 PM
Updated by:
 
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