Specifications

30 AT-9800 Series
C613-03043-00 REV B
While 1000BASE-T GBICs will auto-negotiate at the copper Ethernet level, the
ports will behave as if in fixed 1000 Mbps full duplex mode. This is because the
SERDES connection used by GBIC ports makes the auto-negotiation invisible
to the switch, and so prevents a successful link negotiation.
When a 1000BASE-T GBIC is inserted into a GBIC slot, the port’s auto-
negotiation capability is disabled. This means that the port speed may not be
set to "auto-negotiate". If the port had been configured to auto-negotiate (by
default or by command) prior to the GBIC’s insertion, then this configuration is
overridden for as long as the GBIC remains in place.
CompactFlash
AT-9800 series switches have a CompactFlash slot on their rear panel. Future
software releases will support flash memory expansion and file transfer
through via CompactFlash cards.
Content Addressable Memory (CAM)
LineCAM is a plug-in module that extends the switch’s forwarding database.
One type of LineCAM is available, a 192 k-entry module. Adding a LineCAM
module extends the switch’s Layer 2/Layer 3 forwarding database from 40 k-
entries to 232 k-entries. One LineCAM module can be installed in each AT-9800
series switch.
LineCAM can be ordered as a pre-installed item when purchasing a switch, or
can be purchased separately and installed as needed.
LineCAM can also be installed in some SwitchBlade line cards.
To check how much CAM is installed, enter
SHOW SWITCH
For information on installing CAM, see “Restricted Procedures” on page 31.
Dual In-line Memory Modules (DIMMs)
Synchronous DRAM for AT-9800 Series switches is provided by a single
DIMM. Two memory sizes are supported, 128 MBytes and 256 MBytes.
Only Allied Telesyn supplied DIMMS have been tested and approved for use
with AT-9800 Series switches. Using DIMM that has not been approved may
cause unreliable operation and will invalidate the switch’s warranty.
To check how much DIMM is installed, enter
SHOW SWITCH
For information on installing DIMM, see “Restricted Procedures” on page 31.