Mib Support; Distributed Clocking - Cabletron Systems 9A656-04 Configuration Manual

1.3.4 MIB Support

The 9A686-04 provides support for a variety of Industry Standard and Enterasys Systems
specific MIBs. Details on these MIBs are provided in later chapters of this Guide. The MIBs
supported are as follows:
• MIB2 (RFC 1573)
• AToM MIB (RFC 1695)
• AToM II MIB
• ILMI MIB
• PNNI MIB
• Enterasys MIBs
• SFCS MIB
• ctNetwork MIB
• ctPIC MIB
• ctFlash MIB
• nwRouter MIB
• ctron Mib2 MIB Ext.

1.3.5 Distributed Clocking

The 9A686-04 supports three clocking modes:
Clock Recovery Mode
This clocking mode is required when the 9A686-04 is CONNECTED to the public ATM
network. In this mode, the 9A686-04 derives its transmit clock from the incoming line clock.
Master Clock Distribution
This clocking mode is required when the 9A686-04 is PART of the public ATM network. In
this mode, one 9A686-04 installed in the SmartSwitch 9500 chassis is configured as the
master clock for all other modules attached to the CTM backplane. The 9A686-04 that is the
master clock then distributes all clocking information to all the other modules.
Local Clock Mode
This clocking mode may be used by the 9A686-04 if the master clock signal is lost, or in the
absence of any external clock source. In this mode each 9A686-04 installed in the chassis acts
as its own clock source.
9A656-04/9A686-04 Configuration Guide
Overview
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