Cisco Cisco FastHub 412M 10 100 Repeater 릴리즈 노트

Using Cisco Discovery Protocol (CDP) with a FastHub 400M no longer causes 
occasional console lockup. [CSCdr17179]

The FastHub 400M model can store up to 4096 MAC addresses in memory; the 
optional switched uplink modules can store up to 1536 MAC addresses. If you 
experience excessive flooding of unicast packets on these devices, your hub or 
module might have reached its maximum. To clear the MAC address table, 
power-cycle the hub. [CSCdk90641] 

Some series 400 FastHubs have improperly terminated 100-Mb TXEN signal 
lines at the extension port. If this problem occurs when no extension module 
is present, 100-Mb data can be corrupted. Firmware Release 1.00.02 and 
higher detects the absence of an extension module and isolates the extension 
port from the hub.

Before connecting a FastHub 400M model to a modem, you should configure 
your modem to ignore input from the data terminal equipment (DTE) during 
dial-out or dial-in. Without this precaution, there is a small chance that the 
modem could disconnect. Refer to your modem manual for the correct 
configuration command syntax. [CSCdk83978] [CSCdk83009] 

You must purchase and use the FastHub 400 stacking cable (Part Number 
WS-C400-CAB-EXP) to create a hub stack of interconnected FastHub 400 
models. Do not use any other cable for this purpose. You can order this cable 
from your Cisco representative or reseller.