Cabletron Systems EMM-E6 manual LDRAM SIMM Slot, FLASH Memory SIMM Slot, BRIM-F Ribbon Connector

Internal Components

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.

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.

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.

EMM-E6 Installation Guide 2-5