ancientcontra
Technical User
Hi many 5330 phones and 4 3300 controllers
We have a flat /12 network for all of our voice, the controllers and the scopes for the phones.
we use cisco swiches with a helper address on each SVI pointing to a 2003DHCP server prociding data VLAN addresses.
we use option 128 on these servers to reach the DHCP servers on the mitel controllers.
We have had a number of Ip phones that have lately been plugged into a different data vlan, and about 5 percent of them can no longer get a dhcp address.
The firmware hasnt changed and many of the phoens that have been moved still work fine. All host facing ports are configured the same way. We use CDP.
After taking a wireshark capture of a working phone and a non working phone, the differences are:
Working:
sends 4 0x4545 frames
sends 2 EAPOL start Frames
sends 2 CDP frames
sends a duplex value of FULL
Sends a DHCP Discover frame
Gets a DHCP Offer from the SVI on behalf of the win 2003 DHCP server
Sends a DHCP Request for the offer
Gets an Ack from SVI (Yo layer 3!)
sends Gratuatios arp for offered address (This a client side check for duplciate ip's addresses im guessing)
sends dhcp release grab the voice vlan adressess etc etc.....
Phone works
Non working phone:
sends 4 0x4545 frames
sends 2 EAPOL start Frames
sends 2 CDP frames
sends a duplex value of HALF!!!!!!!!!!!!!
Sends a DHCP Discover frame
Gets a DHCP Offer from the SVI on behalf of the win 2003 DHCP server
DOES NOT Send a DHCP Request for the offer..........
Sends a DHCP Discover frame
Gets a DHCP Offer from the SVI on behalf of the win 2003 DHCP server
DOES NOT Send a DHCP Request for the offer..........
doesnt work
Now I have tried Manually setting Ip address, Vlans prioritys, as well as manually setting the duplex on the phone.
Both phones have identical firmware and identical hardware setups.
Both captures were taken on the same port.
the only difference is that the working phone sends a full duplex capability, and the non working one sends half. The working phone sends a request for its offer, and the non-working one ignores the offer and tries a discover again.
we are using minet not sip
I have tried a factory reset
Anyway to manually force the firmware onto it again or factory reflash the device using my own tftp server ? Ive seen instructions on the web for sip, not minet.
We have lost aabout 10 phones to this "Disease"
Nick Cutting
MSCA CCNA A+ CCNP
We have a flat /12 network for all of our voice, the controllers and the scopes for the phones.
we use cisco swiches with a helper address on each SVI pointing to a 2003DHCP server prociding data VLAN addresses.
we use option 128 on these servers to reach the DHCP servers on the mitel controllers.
We have had a number of Ip phones that have lately been plugged into a different data vlan, and about 5 percent of them can no longer get a dhcp address.
The firmware hasnt changed and many of the phoens that have been moved still work fine. All host facing ports are configured the same way. We use CDP.
After taking a wireshark capture of a working phone and a non working phone, the differences are:
Working:
sends 4 0x4545 frames
sends 2 EAPOL start Frames
sends 2 CDP frames
sends a duplex value of FULL
Sends a DHCP Discover frame
Gets a DHCP Offer from the SVI on behalf of the win 2003 DHCP server
Sends a DHCP Request for the offer
Gets an Ack from SVI (Yo layer 3!)
sends Gratuatios arp for offered address (This a client side check for duplciate ip's addresses im guessing)
sends dhcp release grab the voice vlan adressess etc etc.....
Phone works
Non working phone:
sends 4 0x4545 frames
sends 2 EAPOL start Frames
sends 2 CDP frames
sends a duplex value of HALF!!!!!!!!!!!!!
Sends a DHCP Discover frame
Gets a DHCP Offer from the SVI on behalf of the win 2003 DHCP server
DOES NOT Send a DHCP Request for the offer..........
Sends a DHCP Discover frame
Gets a DHCP Offer from the SVI on behalf of the win 2003 DHCP server
DOES NOT Send a DHCP Request for the offer..........
doesnt work
Now I have tried Manually setting Ip address, Vlans prioritys, as well as manually setting the duplex on the phone.
Both phones have identical firmware and identical hardware setups.
Both captures were taken on the same port.
the only difference is that the working phone sends a full duplex capability, and the non working one sends half. The working phone sends a request for its offer, and the non-working one ignores the offer and tries a discover again.
we are using minet not sip
I have tried a factory reset
Anyway to manually force the firmware onto it again or factory reflash the device using my own tftp server ? Ive seen instructions on the web for sip, not minet.
We have lost aabout 10 phones to this "Disease"
Nick Cutting
MSCA CCNA A+ CCNP
