Avaya Configuring DLSw Services Manual do Utilizador descarregar pdf (Página 156)

Configuring DLSw Services

6-2

With protocol prioritization, the router sorts trafﬁc into queues according to

priority ﬁlters that you conﬁgure. For most trafﬁc, you conﬁgure priority ﬁlters on

an outbound interface. If a queue is full or you have conﬁgured an outbound drop

ﬁlter, the router discards (clips) the trafﬁc. For DLSw trafﬁc you can also create

priority queues for DLSw peers; the router cannot clip DLSw trafﬁc.

The router holds the sorted packets in priority queues. It then uses a dequeuing

allocation algorithm to drain the queues and transmit trafﬁc.

Priority queues do not affect trafﬁc as it is entering the router, but rather affects the

sequence in which data leaves an interface. For this reason, Protocol Prioritization

is considered an “outbound” ﬁlter mechanism.

Two Types of Protocol Prioritization

There are two separate implementations of protocol priority queuing. For all

synchronous protocols that support outbound trafﬁc ﬁlters, Bay Networks

supports a high, normal, and low priority queue at the circuit interface level. For

inbound and outbound DLSw trafﬁc, Bay Networks also supports one to ten

queues at the TCP level for DLSw peers.

Using existing protocol prioritization support, you can prioritize DLSw trafﬁc

before other protocols. DLSw protocol prioritization provides a mechanism for

prioritizing speciﬁc types of DLSw trafﬁc, such as:

• Ethernet

• Frame Relay

• SDLC

• Token Ring

• Other source route bridge (SRB) trafﬁc

Note: You can apply both circuit-level prioritization and TCP-level

prioritization to DLSw trafﬁc. Note that TCP-level prioritization alone does

not give DLSw trafﬁc precedence over other routing protocols. For

information about circuit-level prioritization, refer to Conﬁguring Trafﬁc

Filters and Protocol Prioritization.

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Avaya Configuring DLSw Services Manual do Utilizador Página 156