Mitel phones not liking the SYN/ACK

[johnp]

I would temporarily set the vlan and icp values static. The phones in question may have old firmware that requires updating

[ralph]

The phones in question may have old firmware that requires updating

Good point.

Ralph

[jrg0852]

How is your option 125 looking?

[parvikram]

Hello Ralph, its all static IP addresses. Also, I was wondering if its possible for Mitel phones to register via UDP instead of TCP. Is it possible?

[ralph]

No.  There is not way to change the registration from TCP to UDP.

Ralph

[parvikram]

Thanks Ralph. From the captures, you see any reason as to why the phones might not be registering ?

[ralph]

No, but then I lack any real expertise in Wireshark.
What happens if you plug the non working phone in the same port as the working phone?

One other thought, try turning off LLDP and try it.

Ralph

[LoopyLou]

Would suggest you try Ralph's suggestion of taking the non-working phone and plug it into the port where you got a phone to work ( you could also swap the working phone and plug it into the port where you had your non working phone ).  That would be the quickest way to eliminate a port configuration issue.