Cabletron Systems EMM-E6 - Manual (Page 17)

Internal Components
EMM-E6 Installation Guide 2-5
LDRAM SIMM Slot
The EMM-E6 comes with 4 MB of Local Dynamic Random Access
Memory (LDRAM) built into the module and one 4 MB SDRAM SIMM,
for a total of 8 MB of Shared Dynamic RAM. LDRAM is the “Main”
memory from which the switching functionality of the EMM-E6 operates.
FLASH Memory SIMM Slot
The EMM-E6 incorporates 2 MB of FLASH Electrically Erasable
Programmable Read Only Memory (FLASH EEPROM). FLASH
memory holds the operating instruction code of the EMM-E6. When the
module is activated, the instruction code (firmware) held in FLASH
memory is forwarded to Main memory, decompressed, and used to start
up the EMM-E6.
The use of FLASH memory, in conjunction with the runtime download
capabilities of the EMM-E6, allows the downloading of firmware to the
module without requiring that the module be shut down. The firmware
download may be performed at any time during the operation of the
module, and the new firmware image will be used at the next reset of the
module.
BRIM-F Ribbon Connector
The BRIM-F ribbon connector provides a connection point for the special
ribbon cable used to connect FDDI BRIMs (the BRIM-F6 or BRIM-F0)
to Ethernet Channel E of the EMM-E6.
NOTE
Some advanced EMM-E6 operations, such as extended
RMON or Cabletron Systems Routing Services, require an
EMM-E6 with greater than 8 MB of LDRAM. In these cases, the
4 MB SIMM that is shipped in the LDRAM slot must be
upgraded to a higher-capacity SIMM. Contact your Cabletron
Systems Sales Representative for more information about
available memory upgrades for the EMM-E6.
ICH1Book Page 5 Tuesday, August 6, 1996 3:06 PM