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Community Member

IPT VOIP Access layer Switches

For a new Building with 3 floors, 250 Users per floor using 2 x 6509/720 Sup's for the Core. Which Access layer switches would you use?

Would you use Layer2 (RPVST) or Layer3 (EIGRP stub) at the Access Layer?

3750 Cluster PoE EMI software

Pro's Resilient

Con's Expensive, Switches are now 3-4 years old possible EOL soon.

4506 4507R 4510R Sup2+ PoE Blades

Pro's Cheap

Con's Old technology based on 4006 Architecture 6gbps backplane,

If one power of the power supplies fails some of the phones will stop working

possible EOL Soon

6509 Sup32 PoE Classic line Blades

Pro's

Con's most expensive

3 REPLIES
Community Member

Re: IPT VOIP Access layer Switches

2 per floor: 4506 or 1 4510 with External AC Power Shelf (in a no downtime/tight SLA environment). Split power across a properly rated UPS for no exceptions.

Provides 20% + for growth

Your environment is sim' to mine. No problems to report.

PVST+/RPVST

Community Member

Re: IPT VOIP Access layer Switches

When was this deployed?

Which IPT vendor are you using?

How are you measuring Latency / Jitter / Voice Quality?

Community Member

Re: IPT VOIP Access layer Switches

When was this deployed?

>>>> Started Oct 06, dep' still ongoing

Which IPT vendor are you using?

>>>> All Cisco devices aggregate to Avaya Call Managers and gateways (Company's choice)

How are you measuring Latency / Jitter / Voice Quality?

>>> Across a modern LAN is not an issue. Across the WAN, Avaya brought in a small, test box (call sim/statistical measurement) at each end of the access layer with various voice codecs. G.729 is employed here.

Keys are a clean WAN circuit and good QoS implementation.

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