HOW CALCULATE MAX ROUTE ENTRY ON CISCO 2811 ????

[Santiago Garcia Diago]

this its the equipment ;

Cisco IOS Software, 2800 Software (C2800NM-IPBASE-M), Version 15.0(1)M3, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Sun 18-Jul-10 02:24 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T11, RELEASE SOFTWARE (fc1)

BXEURCO3 uptime is 1 year, 29 weeks, 4 days, 14 hours, 2 minutes
System returned to ROM by power-on
System restarted at 00:02:43 DST Fri Jun 26 2015
System image file is "flash:c2800nm-ipbase-mz.150-1.M3.bin"
Last reload type: Normal Reload

Cisco 2811 (revision 53.51) with 509952K/14336K bytes of memory.
Processor board ID FCZ144520VN
2 FastEthernet interfaces
48 terminal lines
DRAM configuration is 64 bits wide with parity enabled.
191K bytes of non-volatile configuration memory.
125440K bytes of ATA CompactFlash (Read/Write)

[Karsten Iwen]

I have no formula for the calculation. But regardless what you do, the maximum throughput of this device will be exhausted before you reach the maximum routes of the device.

[Joseph W. Doherty]

It depends on your amount of free RAM and whether IPv4 or IPv6.  Likely also depends whether CEF is active.

Like Karsten, I don't know of an exact calculation.  I suspect it might vary a bit based on platform and IOS version.

I would guessimate about 10 bytes per route for IPv4 and twice that for IPv6.