Avaya BCM 2.0 Programming Guide de l'utilisateur télécharger pdf (Page 220)

220 Configuring Enterprise Edge Services

Enterprise Edge 2.0 Programming Operations Guide P0911588 Issue 01

To delete a trap community:

1. In the Trap Community table, click the trap community you want to delete.

2. On Configuration menu, click Delete Trap Community.

A message appears that asks you to confirm the deletion.

3. Click the Yes button to confirm the deletion.

QoS

The purpose of the Enterprise Edge QoS module is to set priorities for IP traffic and

to assign quality of service levels to critical applications and IP telephony.

The Enterprise Edge QoS module serves two primary purposes:

• In a DiffServ network, QoS acts as an edge device and performs the packet

classification, marking, and prioritizing.

• In a non-DiffServ or legacy network, QoS manages the WAN link bandwidth to

make sure critical voice (and optional video) packets get high priority when

crossing the slow WAN link in both directions.

Relationship between the QoS Module and the VoIP QoS Monitor

The VoIP gateway in Enterprise Edge includes a VoIP Quality-of-Service (QoS)

Monitor that periodically monitors the delay and jitter of IP networks between two

peer gateways by using a proprietary protocol. These monitoring packets are

delivered at UDP port 5000.

The mainobjective of the VoIP QoS Monitor is to allow new VoIP calls to fall back

to the PSTN if the IP network is detected as “bad”.

The QoS module discussed here complements the VoIP QoS Monitor. While the

VoIP QoS Monitor passively monitors the IP network, the QoS module actively

improves the IP network by giving VoIP packets higher priority to travel so that the

chance for the VoIP QoS Monitor to detect the connection as “bad” is reduced.

Note: For a VoIP call, if a packet passes the VoIP QoS Monitor but fails the QoS

admission control, it is delivered over IP but only as a best-effort flow.

There is no fallback to PSTN if a packet has passed the VoIP QoS Monitor

checking.

VoIP QoS Monitor packets travel at the same priority as VoIP packets, which is at

higher priority than normal IP packets. If VoIP packets travel at a premium level

but VoIP QoS Monitor packets travel at normal best-effort level, it is possible for

the VoIP QoS Monitor to report the IP network as “bad” and start fallback to the

PSTN, but the actual delay and jitter for VoIP packets are still “good” since VoIP

packets have a higher priority. To avoid this, add UDPport 5000 to the high priority

queue in all routers.

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Avaya BCM 2.0 Programming Guide de l'utilisateur Page 220