Nortel 2000, Инструкция по использованию

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Chapter 4 Policy-enabled networks 285
Using the Business Policy Switch 2000 Version 1.2
As displayed in Table 58 , the traffic service class determines the IEEE 802.1p
priority that determines the egress queue of the traffic. Non-IP traffic can be in the
same IP service class if the non-IP packets are assigned the same IEEE 802.1p
priority.
When the power is turned on, all ports are considered untrusted. You can change
the power-up defaults using the Web-based management interface. See Using
Web-based Management for the Business Policy Switch 2000 Software Version
1.2.
Queue sets
The cascade port has a set of 2 queues that are serviced using an absolute priority
discipline. Filters are installed only on cascade ports that are connected to
BayStack 450 units in the stack.
BPS 2000 ports are associated with two types of queue sets:
• Queue set 1 has four queues. The first queue is serviced in an absolute priority
fashion. The other three queues are serviced in a WRR fashion.
• Queue set 2 has two queues that are serviced in an absolute priority fashion.
AF41(22), AF42(24), AF43(26),
CS4(20) Platinum 2 2 5
AF31(1A), AF32(1C), AF33(1E),
CS3(18) Gold 4
AF21(12), AF22(14), AF23(16),
CS2(10) Silver 3 3
AF11(A), AF12(C), AF13(E),
CS1(8) Bronze 2
DE(0), CS0(0) Standard 4 0
Table 58 Default mapping of DSCP to QoS class and IEEE 802.1p (continued)
Incoming or re-marked DSCP
(hex values)
QoS class
Number of queues
2 4
Outgoing IEEE
802.1p user
priority