Vlan Interaction - Cisco 7800 Series Administration Manual

VLAN Interaction

Network Protocol
Transmission Control Protocol
(TCP)
Transport Layer Security (TLS)
Trivial File Transfer Protocol
(TFTP)
User Datagram Protocol (UDP)
Related Topics
VLAN Interaction
The Cisco IP Phone contains an internal Ethernet switch, enabling forwarding of packets to the phone, and
to the computer (access) port and the network port on the back of the phone.
If a computer is connected to the computer (access) port, the computer and the phone share the same physical
link to the switch and share the same port on the switch. This shared physical link has the following implications
for the VLAN configuration on the network:
Cisco IP Phone 7800 Series Administration Guide for Cisco Unified Communications Manager
16
Cisco Unified Communications Manager
Verify the Network Setup, on page 33
Verify Phone Startup, on page 52
Purpose
TCP is a connection-oriented
transport protocol.
TLS is a standard protocol for
securing and authenticating
communications.
TFTP allows you to transfer files
over the network.
On the Cisco IP Phone, TFTP
enables you to obtain a
configuration file specific to the
phone type.
UDP is a connectionless messaging
protocol for delivery of data
packets.
Documentation, on page xiii
About the Cisco IP Phone
Usage Notes
Cisco IP Phones use TCP to
connect to Cisco Unified
Communications Manager and to
access XML services.
When security is implemented,
Cisco IP Phones use the TLS
protocol when securely registering
with the Cisco Unified
Communications Manager. For
more information, see the
documentation for your particular
Cisco Unified Communications
Manager release.
TFTP requires a TFTP server in
your network, which can be
automatically identified from the
DHCP server. If you want a phone
to use a TFTP server other than the
one specified by the DHCP server,
you must manually assign the IP
address of the TFTP server by using
the Network Setup menu on the
phone.
For more information, see the
documentation for your particular
Cisco Unified Communications
Manager release.
UDP is used only for RTP streams.
SIP uses UDP, TCP and TLS.