Specifications

Configure IP Networks for Real-Time Voice Traffic

Voice over IP for the Cisco AS5300 7

Depending on the topology of your network or the resources used in your network, you might need

to perform the following additional tasks:

• Distinguish Voice and Modem Calls on the Cisco AS5300

• Optimize Dial Peer and Network Interface Conﬁgurations

— Conﬁgure IP Precedence for Dial Peers

— Conﬁgure RSVP for Dial Peers

— Conﬁgure CODEC and VAD for Dial Peers

• Conﬁgure Voice over IP for Microsoft NetMeeting

Voice over IP for the Cisco AS5300 also offers VFC management features that enable you to easily

upgrade and manage the system software stored in VFC Flash memory. You might need to perform

the following tasks to manage VCWare or DSPWare:

• Download VCWare

• Copy Flash Files to the VFC

— Download VCWare to the VFC from the AS5300 Motherboard

— Download VCWare to the VFC from a TFTP Server

• Unbundle VCWare

• Add Files to the Default File List

• Add CODECs to the Capability List

• Delete Files from VFC Flash Memory

• Erase the VFC Flash Memory

All of these tasks are described in the following sections.

Conﬁgure IP Networks for Real-Time Voice Trafﬁc

You need to have a well-engineered network end-to-end when running delay-sensitive applications

such as VoIP. Fine-tuning your network to adequately support VoIP involves a series of protocols and

features geared toward quality of service (QoS). It is beyond the scope of this document to explain

the speciﬁc details relating to wide-scale QoS deployment. Cisco IOS software provides many tools

for enabling QoS on your backbone, such as Random Early Detection (RED), Weighted Random

Early Detection (WRED), fancy queueing (meaning custom, priority, or weighted fair queueing),

and IP Precedence. To conﬁgure your IP network for real-time voice trafﬁc, you need to consider the

entire scope of your network, then select the appropriate QoS tool or tools.

It is important to remember that QoS must be conﬁgured throughout your network—not just on the

AS5300 devices running VoIP—to improve voice network performance. Not all QoS techniques are

appropriate for all network routers. Edge routers and backbone routers in your network do not

necessarily perform the same operations; the QoS tasks they perform might differ as well. To

conﬁgure your IP network for real-time voice trafﬁc, you need to consider the functions of both edge

and backbone routers in your network, then select the appropriate QoS tool or tools.

In general, edge routers perform the following QoS functions:

• Packet classiﬁcation

• Admission control

• Bandwidth management