max phones per vlan ?

[renzil]

Hi, Is there any recomendation to the max number of IP Phones for the Voice vlan. I need to design the ip address scheme for 2000 IP Phones. Can I have them all in a single vlan ?

Thanks

Brgds

Renzil

[thisisshanky]

SRND docs suggest a good rule of thumb is not more than 512. I would not keep the number of devices that high. Usually limiting to a class C is not a bad idea.

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_implementation_design_guide_chapter09186a0080447513.html

Also keeping the vlan local to each wiring closet will help prevent STP changes propagation from one wiring closet to another.

[aamercado]

You would follow general campus design guidelines irregardless if it was data or voice

See:

cisco.com/go/srnd

under the Campus Design Section:

Under one of those docs, Cisco recommends a 512 limit per vlan

[jefflock1]

We have three different sites where I manage the VoIP network and each site has its own subnet of 192.168.x.x but on each switch we have configured the same vlan for all the phones. I think we use vlan 20 or something. Anyways, we run about 300 phones without a problem. I'm not a networking ace so I'm not sure if it matters that we are using different subnets to the same vlan or not.

Jeff