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Mitel MiVoice Business/MCD/3300 / Re: 3300 ARP/Duplicate ip
« on: October 29, 2014, 05:32:15 AM »
Solved,
Should of spotted this earlier.
the guy who set up the vlan interfaces on our Cisco cat switch has used a wrong subnet mask. The vlan range was 172.18.98.0/23 98.1 to 99.254 For our voice vlan
The vlan interface was configured as 172.18.99.252/24
When the 3300 controller was arping for any addresses in 172.18.98.0 /23 range it considered them to be in a different subnet and sent the request to the hrsp default gateway address 172.18.99.254 ( default Behavoir in address is considered on a diff subnet)
HSRP active interface repsonded with its mac address ( proxy arp) This address was already in the arp cache on the controller as the default gateway address causing the alert to be generated.
Sicne changing the Cisco cat voice vlan interface to the correct subnet mask the controller can send arp request to the entire /23 range.
No more pesky duplicate ip conflict messages.
Should of spotted this earlier.
the guy who set up the vlan interfaces on our Cisco cat switch has used a wrong subnet mask. The vlan range was 172.18.98.0/23 98.1 to 99.254 For our voice vlan
The vlan interface was configured as 172.18.99.252/24
When the 3300 controller was arping for any addresses in 172.18.98.0 /23 range it considered them to be in a different subnet and sent the request to the hrsp default gateway address 172.18.99.254 ( default Behavoir in address is considered on a diff subnet)
HSRP active interface repsonded with its mac address ( proxy arp) This address was already in the arp cache on the controller as the default gateway address causing the alert to be generated.
Sicne changing the Cisco cat voice vlan interface to the correct subnet mask the controller can send arp request to the entire /23 range.
No more pesky duplicate ip conflict messages.