Avaya 555-245-600 사용자 설명서

policy. The TOS byte is an OSI model Layer 3 solution, and works on IP packets on the LAN 
and possibly the WAN, depending upon the service provider.

Resource Reservation Protocol (RSVP) is a protocol that hosts can use to request specific QoS 
parameters through the network for a particular application data stream. A host can request 
guaranteed service through a network. If all routers have RSVP support enabled, and if there 
exists sufficient unreserved bandwidth, a reservation is established throughout the network. If 
insufficient bandwidth exists, the reservation fails and notifies the hosts. At that point, hosts can 
choose to send traffic without a reservation, or drop the connection.
RSVP is supported in Communication Manager beginning with Release 1.3. RSVP can be 
enabled per network region on the network region form. If RSVP is enabled, endpoints including 
IP Telephones and media processors attempt to establish a reservation for each call. If the 
reservation fails, Avaya endpoints still try to place a call, but lower the DiffServ priority of the call 

Bits 0-2IP

precedence

000

001

010

011

100

101

110

111

Routine

Priority

Immediate

Flash

Flash Override

CRITIC/ECP

Internetwork control

Network control

Bit 3

delay

0

1

Normal

Low

Bit 4

Throughput

0

1

Normal

High

Bit 5

reliability

0

1

Normal

High

Bit 6

monetary cost

0

1

Normal

Low

Bit 7

reserved

Always set to 0