RSVP
Issue 3.4.1 June 2005
319
RSVP
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
to the better-than-best-effort (BBE) DSCP that is defined on the network region form. By default,
this value is 43.
If RSVP is enabled on a network region, it is very important that it also be enabled on
associated routers. If not, all RSVP reservations fail, and all voice traffic in that region is marked
with the BBE DSCP, which will generally receive degraded service versus the EF (DSCP 46)
DiffServ Code Point.
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
Table 74: Original TOS specification (continued)
Bit
description
Value
Use
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Содержание Application Solutions
Страница 1: ...Avaya Application Solutions IP Telephony Deployment Guide 555 245 600 Issue 3 4 1 June 2005 ...
Страница 20: ...About This Book 20 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 21: ...Issue 3 4 1 June 2005 21 Section 1 Avaya Application Solutions product guide ...
Страница 22: ...22 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 74: ...Avaya Application Solutions platforms 74 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 106: ...Call processing 106 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 124: ...Avaya LAN switching products 124 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 139: ...Issue 3 4 1 June 2005 139 Section 2 Deploying IP Telephony ...
Страница 140: ...140 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 186: ...Traffic engineering 186 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 204: ...Security 204 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 214: ...Voice quality network requirements 214 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 228: ...Avaya Integrated Management 228 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 239: ...Reliability Issue 3 4 1 June 2005 239 Figure 69 S8700 Media Server in a high reliability configuration ...
Страница 274: ...Reliability and Recovery 274 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 275: ...Issue 3 4 1 June 2005 275 Section 3 Getting the IP network ready for telephony ...
Страница 276: ...276 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 350: ...Implementing Communication Manager on a data network 350 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 356: ...Network recovery 356 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 366: ...Network assessment offer 366 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 367: ...Issue 3 4 1 June 2005 367 Appendixes ...
Страница 368: ...Appendixes 368 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 394: ...Access list 394 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 414: ...DHCP TFTP 414 Avaya Application Solutions IP Telephony Deployment Guide ...