Configure RSVP

How to Enable a RSVP on a Router

How to Start RSVP in a IP Phone Module Configuration

How to use RSVP to configure Command

How to configure TOS and Precedence for RSVP flow

How to use access-list in RSVP module

This chapter explains how to configure RSVP. For details about RSVP Command, see “RSVP Command” in the “Network Protocol Command Reference”. For other document about Command, use index or type in Command in online help.

Try to understand RSVP before configuring it, which would be helpful for users. RSVP protocol can be used by a host to request a certain quality of business to an application data process. Routers can use RSVP protocol to transfer quality of service request and carry out reservation. RSVP request is going to be reserved on each node of data channels.

RSVP resource request is for single task data process. Logically, RSVP separates data sender and receiver, despite sender and receiver are in the same application process. RSVP is above IP protocol. Although RSVP does not transfer data, it belongs to Internet protocol (just like ICMP, IGMP or routing protocol). RSVP implementation is like routing protocol and managing protocol.

RSVP is not a routing protocol; however RSVP is able to assist a current and future routing protocol. A routing protocol decides how to transfer a data package, while RSVP deals with the Quality of Service (QoS) of the transferred data packages.

RSVP and WFQ (weighted fair queuing) or RED (random early detection) coordinate and function together. This kind of coordination contains two major concepts: use the RSVP flow between two ends, and use WFQ dialog between two routers.

How to Enable a RSVP on a Router

To enable RSVP on a router, users must configure the interface for starting RSVP, which can be realized by configure Command with interface on the RSVP. When the above configuration is done, RSVP protocol is able to work on these interfaces.

Configure Network interface with RSVP and use the following Commands in interface configurations:

Command

Function

ip rsvp bandwidth [interface-kbps] [single-flow-kbps]

Configure Network interface with RSVP

Note: When using ip rsvp bandwidthCommand, under default configuration (interface-kbps and single-flow-kbp), the max resource reservation for the whole port and resource reservation for single data process will be limited to just 75% of the port total resource.

How to Start RSVP in a IP Phone Module Configuration

Before configuring our IP Phone and IP Phone module of the router to use Voice over IP, users have to enable RSVP to use RSVP to reserve resource.

RSVP Command has to be configured on ports that requires RSVP. That is because RSVP is disable by default. (See the last chapter)

IP phone disables QoS (default), therefore, users must configure dial-peer voipCommand with enabling QoSCommand.

To enable RSVP on interface f0/0, use the following commands in dailpeer Configuration mode of none IVR type:

Command

Function

req-qos { best-effort | controlled-load | guaranteed-delay }  

used Qos policy in dialpeer

 

How to use RSVP to configure Command

In this RSVP, users may use Command provided by the module to adjust RSVP. Adjustments including establishing RSVP conversation, RSVP path, path tear, resv, resv tear message transmission. This is going to be useful for users to test RSVP.

Users may use the following Commands in global configuration mode:

Command

Function

ip rsvp local session session-ip-address session-dport {tcp | udp}

By setting this Command, users may configure a new RSVP dialog, which can be used by other Commands.

ip rsvp local sender session-id sender-ip-address sender-sport [bandwidth] [burst-size]

Users may send path message with this Command, whose no form may send path tear message.

ip rsvp local reservation session-id sender-ip-address sender-sport [guarantee | load] [bandwidth] [burst-size]

Users may send resv message with this Command, whose no form may send resv tear message.

How to configure TOS and Precedence for RSVP flow

To obtain better reservation results, users may use Commands offered by RSVP module to configure TOS and Precedence for RSVP. When RSVP flow is over the reserved range, the Command configures a higher TOS. When RSVP flow is within the reserved range, the command configures a lower TOS. So does Precedence.

Users may use the following Command in interface configuration mode:

Command

Function

ip rsvp tos {conform|exceed} tos-value

This Command can be used to configure the reserved TOS options.

ip rsvp precedence {conform|exceed} precedence-value

This Command can be used to configure the reserved precedence options.

How to use access-list in RSVP module

When users are configuring RSVP on a router, they are able to use accesslist to accept or reject communication with certain hosts or routers.

Command

Function

ip rsvp neighbor access-list-name

With this function, users may configure the following Commands under interface configuration mode: