network audit report

When such network audit report are usedin theoryyou can "engineer out" explicit considerations of jitter by accounting for worst-case per-hop delays. Advanced formulas can be used to arrive at network-specific design recommendations for jitter (based on maximum and minimum per-hop delays). Alternatively, because extensive lab testing has shown that voice quality degrades significantly when jitter consistently exceeds 30 ms, this 30 ms value can be used as a jitter target

Because of its strict service-level requirements, VoIP is well suited to the expedited forwarding per-hop behavior, defined in RFC 3246 (formerly RFC 2598). Therefore, it should be marked to DSCP EF (46) and assigned strict-priority servicing at each node, regardless of whether such servicing is done in hardware (as in Catalyst switches through 1PxQyT queuing, discussed in more detail in Chapter 10, "Catalyst QoS Tools") or in software (as in Cisco IOS routers through LLQ, discussed in more detail in Chapter 5, "network audit report").