Multi-Tech Systems MVP-2410, MVP-3010, MultiVOIPTM, E1 manual Background Bulk transfers and other

MultiVOIP User Guide Technical Configuration

The Ethernet/IP Parameters fields are described in the tables and text passages below. Note that both DiffServ parameters (Call Control PHB and VoIP Media PHB) must be set to zero if you enable Packet Prioritization (802.1p). Nonzero DiffServ values negate the prioritization scheme.

Ethernet/IP Parameter Definitions (cont’d)

Field Name	Values	Description
Ethernet Parameters
Packet	Y/N	Select to activate
Prioritization		prioritization under 802.1p
(802.1p)		protocol (described below).
		.
		Must be set to match
Frame Type	Type II, SNAP
		network’s frame type.
		Default is Type II.
802.1p	A draft standard of the IEEE about data traffic
	prioritization on Ethernet networks. The 802.1p
	draft is an extension of the 802.1D bridging
	standard. 802.1D determines how prioritization
	will operate within a MAC-layer bridge for any
	kind of media. The 802.1Q draft for virtual local-
	area-networks (VLANs) addresses the issue of
	prioritization for Ethernet networks in particular.
	802.1p enacts this Quality-of-Service feature
	using 3 bits. This 3-bit code allows data switches to
	reorder packets based on priority level. The
	descriptors for the 8 priority levels are given below.
	802.1p PRIORITY LEVELS
	LOWEST PRIORITY
	1 – Background: Bulk transfers and other
	activities permitted on the network,
	but should not affect the use of
	network by other users and
	applications.

2 – Spare: An unused (spare) value of the user priority.

0 – Best Effort (default): Normal priority for ordinary LAN traffic.

3 – Excellent Effort: The best effort type of service that an information services organization would deliver to its most important customers.

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