Cisco MC3810 Guía de instalación descargar pdf (Pagina 13)

Optimizing Dial Peer and Network Interface Configurations

Configuring Voice over IP for Cisco MC3810 Series Concentrators 13

Optimizing Dial Peer and Network Interface Conﬁgurations

Depending on how you have conﬁgured your network interfaces, you might need to conﬁgure

additional VoIP dial-peer parameters. This section describes the following topics:

• Conﬁguring IP Precedence for Dial Peers

• Conﬁguring Codec and VAD for Dial Peers

• Conﬁguring Codec Selection Order

Conﬁguring IP Precedence for Dial Peers

If you want to give real-time voice trafﬁc a higher priority than other network trafﬁc,you can weight

the voice data trafﬁc associated with a particular VoIP dial peer by using IP Precedence. IP

Precedence provides no admission control.

To givereal-time voicetrafﬁcprecedence overother IPnetwork trafﬁc,use the followingcommands,

beginning in global conﬁguration mode:

In IP Precedence, the numbers 1 through 5 identify classes for IP ﬂows; the numbers 6 through 7 are

used for network and backbone routing and updates.

For example, to ensure that voice trafﬁc associated with VoIP dial peer 103 is given a higher priority

than other IP network trafﬁc, enter the following:

dial-peer voice 103 voip

ip precedence 5

In this example, when an IP call leg is associated with VoIP dial peer 103, all packets transmitted to

the IP network via this dial peer will have their precedence bits set to 5. If the networks receiving

these packets have been conﬁgured to recognize precedence bits, the packets will be given priority

over packets with a lower conﬁgured precedence value.

Conﬁguring Codec and VAD for Dial Peers

Coder-decoder (codec) and voice activity detection (VAD) for a dial peer determine how much

bandwidth the voice session uses. Codec typically is used to transform analog signals into a digital

bit stream and digital signals back into analog signals—in this case, it speciﬁes the voice coder rate

of speech for a dial peer. VAD is used to disable the transmission of silence packets.

Conﬁguring Codec for a VoIP Dial Peer

To specify a voice coder rate for a selected VoIP peer, use the following commands beginning in

global conﬁguration mode:

Step Command Purpose

1 router(config)# dial-peer voice

number

voip Enter the dial-peer conﬁguration mode to conﬁgure a VoIP peer.

router(config-dialpeer)# ip precedence

number

Select a precedence level for the voice trafﬁc associated with that

dial peer.

Step Command Purpose

1 router(config)# dial-peer voice

number

voip Enter the dial-peer conﬁguration mode to conﬁgure a VoIP peer.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 77 78

Comentarios a estos manuales

Sin comentarios

Cisco MC3810 Guía de instalación Pagina 13

Comentarios a estos manuales

Relacionado con productos y manuales para Máquinas de fax Cisco MC3810