Howto:For how many phones can an ip3000 be dhcp server be used: Difference between revisions
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==Applies To== | ==Applies To== | ||
This information applies to | This information applies to | ||
* | * All innovaphone devices with DHCP server | ||
'''FAQ:''' | '''FAQ:''' | ||
For how many phones can an ip3000 be | For how many phones can an ip3000 be DHCP server be used | ||
'''Answer:''' | '''Answer:''' | ||
The restriction for the amount of | The restriction for the amount of DHCP leases is the limitation of memory segments for VARS. | ||
All leases will be stored in the system VARS. The amount of leases is thus limited by the space available in the VARS segment. To determine, look at | |||
<code>http://x.x.x.x/!mod cmd FLASHMAN0 info</code> | |||
This will show the flash memory usage statistics. Look for a line like | |||
<code>VARS - used 21k avail 71k owned 128k (max 128k)</code> | |||
This shows the limit for the VARS, 128k in this example (the size is fixed for a specific type of device). | |||
A DHCP lease entry has 84 Bytes so the theoretical limit is (128 * 1024 / 84) => 1560. However, there are many other applications using the VARS segment. A reasonably safe assumption is that 32k can be used for leases, so 400 leases are OK. If in doubt, consult the ''avail'' figure shown in the <code>mod cmd</code> output above. | |||
Latest revision as of 11:27, 28 May 2009
Summary
Maximum users for an innovaphone DHCP Server
Applies To
This information applies to
- All innovaphone devices with DHCP server
FAQ:
For how many phones can an ip3000 be DHCP server be used
Answer: The restriction for the amount of DHCP leases is the limitation of memory segments for VARS.
All leases will be stored in the system VARS. The amount of leases is thus limited by the space available in the VARS segment. To determine, look at
http://x.x.x.x/!mod cmd FLASHMAN0 info
This will show the flash memory usage statistics. Look for a line like
VARS - used 21k avail 71k owned 128k (max 128k)
This shows the limit for the VARS, 128k in this example (the size is fixed for a specific type of device).
A DHCP lease entry has 84 Bytes so the theoretical limit is (128 * 1024 / 84) => 1560. However, there are many other applications using the VARS segment. A reasonably safe assumption is that 32k can be used for leases, so 400 leases are OK. If in doubt, consult the avail figure shown in the mod cmd output above.