Tos Settings (Layer 3 Qos) - NEC Univerge SV9100 Manual

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15.4 ToS Settings (Layer 3 QoS)

SV9100 Networking Manual

Enter a valid VLAN ID of 1~4094. Press the OK soft key after the

setting is changed.

Press 4 on the dial pad for Port VLAN Priority.

Enter the VLAN priority of 0~7. Press the OK soft key after the setting

If no more changes are made, press the Exit soft key three times.

Then press the Save soft key, and the phone reboots.

The marking of packets at layer 3 is done by marking the ToS byte in the IP

header of the voice packet. The UNIVERGE SV9100 supports two methods for

marking the ToS byte:

IP precedence

DSCP (Diffserv)

IP Precedence

IP Precedence uses the first 3 bits of the ToS field to give eight possible

precedence values (0~7). Under normal circumstances the higher the number the

higher the priority. However this is left to the network administrator for setup. The

administrator may assign this in exactly the opposite manner with the lower

values having a higher priority. Below are the eight common values for IP

000 is an IP precedence value of 0, sometimes referred to as routine or best

001 is an IP precedence value of 1, sometimes referred to as priority.

010 is an IP precedence value of 2, sometimes referred to as immediate.

011 is an IP precedence value of 3, sometimes referred to as flash.

100 is an IP precedence value of 4, sometimes referred to as flash override.

101 is an IP precedence value of 5, sometimes called critical.

110 is an IP precedence value of 6, sometimes called Internetwork control.

111 is an IP precedence value of 7, sometimes called network control.