Mitel MiVOICE BUSINESS, Engineering Manualline

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Engineering Guidelines
234
START-UP SEQUENCE AND DHCP
The previous chapter “Network Configuration Concepts” on page 195 dealt with network
conditions and call traffic. However, before any of this can occur, the system first needs to be
installed and the phones need to obtain their operating software. Refer to Table 77 for VLAN
priority information.
“LAN Policy” consists of a set of three parameters that are used to control segregation and
priority of voice traffic across the network. These parameters are
• VLAN ID (IEEE 802.1Q)
• Layer 2 priority (IEEE 802.1D/p)
• Diffserv Codepoint (DSCP, Layer 3 priority)
STARTUP SEQUENCE FOR PHONES
OPTIONS FOR OBTAINING LAN POLICY SETTING INFORMATION PER
SOFTWARE RELEASE
There are now four potential methods that MiVoice IP Phones can use to obtain VLAN setting
information, they are:
1. Static values that are held in the phone’s flash memory. (The installer can program the
phone with static values via the phone’s keypad).
2. The Voice VLAN may be learned via LLDP-MED.
3. The Voice VLAN may be learned via CDP.
4. The Voice VLAN may be learned via DHCP.
Note: The 5302 start up sequence differs from the method used by other Mitel phones.
Refer to “5302 Startup and DHCP” on page 243 for information about the 5302 phone.
Notes:
1. Not all phones support all of the above options. See “IP Phones and VLAN
programmability” on page 242 to determine which phones support which options.
2. The 5550 IP console supports methods 3-4. The 5302 is covered on page 243.
3. Third-party SIP devices do not necessarily support the options that are supported
by Mitel phones. In general third party SIP phones should be statically programmed.
4. The legacy 5550 TKB does not support configurable DSCP values. All traffic from
the 5550-TKB is hard coded with a DSCP value of ‘44’.
5. The legacy 5550 TKB does not support LLDP-MED.