Installation Examples
305
USING CISCO ROUTERS AND CATALYST SWITCHES
The Cisco 2600 series routers tested were running Software (C2691-JS-M), Version 12.3(9)
and the Catalyst C3550 Software (C3550-IfQ3L2-M), Version 12.0(20)EA1.
BASIC RULES
•
To segregate traffic, voice and data devices should be run on separate VLANs
•
To transmit VLAN information and Ethernet priority between switches, the inter-switch con-
nections must be defined as VLAN Trunks. We recommend IEEE 802.1Q VLAN trunks.
•
Separate VLANs means that voice and data will also be running on separate IP subnets.
•
To communicate between two different subnets (and between VLANs) traffic must pass
through a router—same subnet communication does not and stays within its VLAN.
BASIC IP ADDRESSING INFORMATION
IP addresses can be written in several different ways; the two most common are:
•
192.168.100.1/24
•
192.168.100.1 255.255.255.0
To an end device these are the same - 255.255.255.0 is 24 binary 1s, therefore the /24. It is
binary mathematics on a combination of the IP addresses and subnet mask that defines whether
traffic being sent has to be directed to the router.
BASIC QUALITY OF SERVICE (QOS)
In a VoIP network QoS exists at two layers:
1.
Layer 2 – Ethernet priority information is used by switches to prioritize voice traffic over
data. It is set using 3 bits within the 802.1Q VLAN header called the 802.1p bits. We
recommend an 802.1p value of 6. However, an alternate value may be used provided that
it is consistent throughout the network and that QoS is set appropriately.
a.
If a MiVoice IP Phone learns its VLAN information via CDP and no other priority infor-
mation is set (static or DHCP), then the 802.1p priority defaults to a value of 5.
b.
When utilizing Cisco auto-qos, Cisco is expecting an 802.1p value of 5.
2.
Layer 3 – IP priority is set using 6 bits within the IP header called Differentiated Services
Code Point (DSCP). DSCP is used by routers to prioritize traffic. The Mitel default value
was 44. This value is programmable to any value. Many IP networks expect a value of 46
- also called Expedited Forwarding (EF). On older ICP software loads the DSCP value may
need to be changed at the first router.
-
When utilizing Cisco auto-qos, Cisco is expecting a DSCP value of 46.
Summary of Contents for MiVOICE BUSINESS
Page 1: ...Mitel MiVoice Business RELEASE 7 2 ENGINEERING GUIDELINES ...
Page 15: ...Chapter 1 ABOUT THIS DOCUMENT ...
Page 16: ......
Page 22: ...Engineering Guidelines 8 ...
Page 23: ...Chapter 2 SYSTEM OVERVIEW ...
Page 24: ......
Page 28: ...Engineering Guidelines 14 ...
Page 29: ...Chapter 3 TYPICAL CONFIGURATIONS ...
Page 30: ......
Page 73: ...Chapter 4 PHONES AND VOICE APPLICATIONS ...
Page 74: ......
Page 95: ...Phones and Voice Applications 81 Figure 9 ICP Connection Paths and Limitations ...
Page 100: ...Engineering Guidelines 86 ...
Page 101: ...Chapter 5 POWER ...
Page 102: ......
Page 128: ...Engineering Guidelines 114 ...
Page 129: ...Chapter 6 PERFORMANCE ...
Page 130: ......
Page 135: ...Chapter 7 APPLICATIONS ...
Page 136: ......
Page 142: ...Engineering Guidelines 128 ...
Page 143: ...Chapter 8 EMERGENCY SERVICES ...
Page 144: ......
Page 151: ...Chapter 9 IP NETWORKING ...
Page 152: ......
Page 167: ...Chapter 10 LICENSING ...
Page 168: ......
Page 183: ...Chapter 11 BANDWIDTH CODECS AND COMPRESSION ...
Page 184: ......
Page 209: ...Chapter 12 NETWORK CONFIGURATION CONCEPTS ...
Page 210: ......
Page 244: ...Engineering Guidelines 230 ...
Page 245: ...Chapter 13 NETWORK CONFIGURATION SPECIFICS ...
Page 246: ......
Page 309: ...Appendix A CAT 3 WIRING ...
Page 310: ......
Page 315: ...CAT 3 Wiring 301 Figure 55 CX MX MXe AX and LX Minimum Cable Standard ...
Page 316: ...Engineering Guidelines 302 ...
Page 317: ...Appendix B INSTALLATION EXAMPLES ...
Page 318: ......
Page 335: ...Appendix C LLDP AND LLDP MED CONFIGURATION EXAMPLES ...
Page 336: ......
Page 347: ...Appendix D VOIP AND VLANS ...
Page 348: ......
Page 353: ...Appendix E VOIP SECURITY ...
Page 354: ......
Page 381: ... ...