ToIP/DHCP problem

[bouboune64]

Hello,

i need an expert !

we are deploying ToIP over our 40 sites.

Dhcp is in our main site. all sites are connected over the wan.

Look attachment , and check @mac source and destination its juste amazing... @mac source does not match with the @mac destination (its an other phone !)

the phone just spam DHCP request , and never boot. Sometimes the phone ll get his ip address and boot...

about 1 phone / 10 may bug.

Thanks for help,

regards,

[acampbell]

Hi,

Can you change the wireshark display filter to

eth.addr eq xx:xx:xx:xx:xx:xx ( where is XX are your phone mac address)

Then lets see if the dhcp server sends the offers etc

Regards

Alex 

[bouboune64]

hi,

well with eth.addr eq 00:08:5d:91:79:e7 , show nothing dhcp side...

but  i can see the offer with error... (check attachment)

[acampbell]

Hi,

So the DHCP server is responding.
It is sending the offer for MAC 00:08:5d:91:79:e7
to a cisco device 10.34.11.254

The offer shows that the IP add 10.34.10.26 is for the client

Does the device 10.34.11.254 ( I assume a router) have an
arp entry for MAC 00:08:5d:91:79:e7

Is the mac in the correct VLAN etc

Regards
Alex

[bouboune64]

hi Alex,

Yes it's a router.

I cant manage the router , only our provider can. But when i get this problem, the provider try to clear the router arp cache. but we still have the problems...

[acampbell]

Hi,

As you have no access to the router, I can
only suggest that you raise a case with the SP.

Send then the last traces you showed here.

Explain that your devices are not receiving the
DHCP offers that the server end is sending.

Hope this helps
Regards
Alex