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Cisco IOS Voice, Video, and Fax Commands: R Through Sh
req-qos
VR-565
Cisco IOS Voice, Video, Fax Command Reference
req-qos
To specify the desired quality of service to be used in reaching a specified dial peer, use the req-qos
command in dial-peer configuration mode. To restore the default value for this command, use the no
form of this command.
req-qos {best-effort | controlled-load | guaranteed-delay}
no req-qos
Syntax Description
Defaults best-effort
Command Modes Dial-peer configuration
Command History
Usage Guidelines This command is applicable only to VoIP dial peers.
Use the req-qos command to request a specific quality of service to be used in reaching a dial peer. Like
acc-qos, when you issue this command, the Cisco IOS software reserves a certain amount of bandwidth
so that the selected quality of service can be provided. Cisco IOS software uses Resource Reservation
Protocol (RSVP) to request quality of service guarantees from the network.
Examples The following example configures guaranteed-delay as the desired (requested) quality of service to a
dial peer:
dial-peer voice 10 voip
req-qos guaranteed-delay
Related Commands
best-effort Indicates that Resource Reservation Protocol (RSVP) makes no bandwidth
reservation.
controlled-load Indicates that RSVP guarantees a single level of preferential service,
presumed to correlate to a delay boundary. The controlled load service uses
admission (or capacity) control to assure that preferential service is received
even when the bandwidth is overloaded.
guaranteed-delay Indicates that RSVP reserves bandwidth and guarantees a minimum bit rate
and preferential queueing if the bandwidth reserved is not exceeded.
Release Modification
11.3(1)T This command was introduced on the Cisco 3600 series routers.
Command Description
acc-qos Defines the acceptable QoS for any inbound and outbound call on a VoIP dial
peer.