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Verify that the non working switches still have their IP helper addresses set like the working ones do.
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Verify that the non working switches still have their IP helper addresses set like the working ones do.

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Took the port authentication 802.1x, deleted it from DHCP, disabled POE, re-enabled it.<br />
Started working fine.
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Took the port authentication 802.1x, deleted it from DHCP, disabled POE, re-enabled it.
Started working fine.

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Hi all,<br />
I have &nbsp;the same error message today. The IP Phone could not get IP in Voice VLAN, its MAC associated with Data VLAN only when it is plugged on two Cisco 2960CX switches. But when I move the IP Phone to other switches rather than these two, it works properly.<br />
<br />
I disabled and reconfigured the port, disabled and re-enabled PoE but could not help. I have not touched the part of 802.1x as it seems not to be in our network. Should I have a look at Dhcp server? Then what would I do there?<br />
<br />
Thanks.
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Hi all,
I have  the same error message today. The IP Phone could not get IP in Voice VLAN, its MAC associated with Data VLAN only when it is plugged on two Cisco 2960CX switches. But when I move the IP Phone to other switches rather than these two, it works properly.

I disabled and reconfigured the port, disabled and re-enabled PoE but could not help. I have not touched the part of 802.1x as it seems not to be in our network. Should I have a look at Dhcp server? Then what would I do there?

Thanks.

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<div class="content wysiwyg-content">
We have alcatel phones, which are giving an error &quot;TFTP Bad address&quot;, i have checked their vlans, they are tagged in correct vlans, and they were working before, so the only thing changed was a firmware upgrade on the switch (HP), but we did &nbsp;firmware upgrade on 10 more switches, and nothing happened to any of the voice phones on those floors, only on one floor are displaying that error.....<br />
Any ideas?
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We have alcatel phones, which are giving an error "TFTP Bad address", i have checked their vlans, they are tagged in correct vlans, and they were working before, so the only thing changed was a firmware upgrade on the switch (HP), but we did  firmware upgrade on 10 more switches, and nothing happened to any of the voice phones on those floors, only on one floor are displaying that error.....
Any ideas?

TFTP bad address

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Switches / Hubs

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

Networking

IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.