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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Summary of Contents for Application Solutions
Page 1: ...Avaya Application Solutions IP Telephony Deployment Guide 555 245 600 Issue 3 4 1 June 2005 ...
Page 20: ...About This Book 20 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 21: ...Issue 3 4 1 June 2005 21 Section 1 Avaya Application Solutions product guide ...
Page 22: ...22 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 106: ...Call processing 106 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 124: ...Avaya LAN switching products 124 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 139: ...Issue 3 4 1 June 2005 139 Section 2 Deploying IP Telephony ...
Page 140: ...140 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 186: ...Traffic engineering 186 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 204: ...Security 204 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 228: ...Avaya Integrated Management 228 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 274: ...Reliability and Recovery 274 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 275: ...Issue 3 4 1 June 2005 275 Section 3 Getting the IP network ready for telephony ...
Page 276: ...276 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 356: ...Network recovery 356 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 366: ...Network assessment offer 366 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 367: ...Issue 3 4 1 June 2005 367 Appendixes ...
Page 368: ...Appendixes 368 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 394: ...Access list 394 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 414: ...DHCP TFTP 414 Avaya Application Solutions IP Telephony Deployment Guide ...