Router Memory
All numbers for Table 1a/b/c are for internal DRAM/Flash only. For Flash Cards/Disks, see Table 4.
Column "E?" is a field that indicates if the unit supports external flash memory (See Table 4).
Memory given as 'standard' (Std) will always be sold as an optimal configuration - for example, the 3660 comes with 32Mb DRAM default, and this is given as a single 32Mb module, instead of 2 x 16Mb. This is always the case unless there is a severe memory component shortage.
Memory Tables - Table 1 - SOHO/SMB Routers
Notes - SOHO/SMB Router Memory
806's and 826's used to come with less DRAM (16Mb) standard. Routers shipped after April 2002 come with 32Mb as default (and maximum).
Newer 8xx's come with internal flash where 2Mb is devoted to the web installer. This is unusable for system images, and is not counted in the table for that very reason.
2500's used to ship with 2Mb DRAM fixed to the motherboard, so some older models may report 2Mb more than normal. AS2500's also ship with either 4 or 8Mb DRAM standard, depending on IOS ordered.
Memory Tables - Table 2 - Midrange/Access Routers
Notes - Midrange/Access Routers
2610-21's were first shipped with 16Mb DRAM, then 24Mb, and now are standardized on 32Mb.
262x's assembled prior to March, 2001 used a bootROM incompatible with the 32Mb Flash module from the 265x series and must be upgraded to the new bootrom to be able to use this module.
36xx routers shipped prior to mid-May of 2002 shipped with 8Mb default flash memory.
On any 4x00M, all 2-slot memory locations must have either a single chip installed or have equal-size chips installed.
Memory Tables - Table 3 - Core Routers
Notes - Core Routers
Some models of I/O, I/O-FE, and I/O-FE-MII had 4Mb Bootflash socketed, others have it fixed onboard.
NPE-100/150/200 and VIP2-10/15/20/40 must pair memory SIMM's.
Memory Tables - Table 4 (External Flash)
Notes - External Flash
Fields in light orange denote what ships, by default, with the product (if any is default at all).
Technically speaking, most sizes of cards will work in most routers, so long as they are "less than" the maximum size it can officially support. What is listed here are what the CCO Docs list and/or what is orderable. Therefore, a smaller or larger card "may" work, but likely will not be supported by TAC.
To see if a card can be interchanged between different model routers, please refer to the following URL :
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