Hi, Just as a side question, but what ip device tracking global command did you use? I have a network with Mitel 5320 phones and they are not responding to device tracking arps. I suspect they dont like source 0.0.0.0 but wanted to know if you have seen similar for this phone?
I don't recall using any global config commands. I only have the commands applied to the interfaces. If I did use global commands, I may have removed them during my tshoot sessions and never put them back in.
if your subnet in the vlan is 192.168.1.0/24
and you sue command :
ip device tracking probe auto-source fallback 0.0.0.6 255.255.255.0 override
arp probe will be send with ip 192.168.1.6
note how dangerous it is if you put 0.0.0.1 and this 192.168.1.1 is your gateway ( all clients will learn that mac for 192.168.1.1 is mac address of l2 port on the switch and traffic will be lost )
if you use:
ip device tracking probe auto-source fallback 0.0.0.0 255.255.255.0 override
probes will be sent with 0.0.0.0 ip
Confirmed with packet captures.
We have a case for this because this bring some issues
- since this command is global it applies to all vlans, it is not guaranteed that you have ip X free in each subnet on access swithc
- since this command defines some fixed mask , strage things happens for smaller subnets , like in this example 192.168.1.32/28
For your case though it might be ok to sue this command in case your phones ignore 0.0.0.0