Cabletron Systems 9T428-16 User Manual
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Introduction
Packet Switching
Packet Switching occurs between the front panel Token Ring connections and/or
to any other module in the chassis via the INB2 bus. These modules are capable of
Transparent Bridging or Source Route Translational Bridging. IEEE 802.1d
Spanning Tree Protocol is supported in all bridging functions.
Source Route Translational Switching
Allows both transparent (TP) and Source Route (SR) packets to be forwarded. SR
packets are translated to TP; the Route Information Field (RIF) is stripped and
cached on each front panel port inbound SR. Outbound packets are automatically
reverse-translated by appending RIF data from the RIF cache into the packets
before transmission.
Management Information Base (MIB) Support
The 9T425-16, 9T427-16, and 9T428-16 modules provide MIB support including:
¥
IETF MIB II (RFC 1213)
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IETF RMON MIB (RFC 1757 and 1513)
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IETF Bridge MIBs (RFC 1493 and 1525)
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IEEE 802.5 Token Ring MIB (RFC 1748)
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IEEE DTR MAC MIB
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Cabletron Enterprise MIBs
LANVIEW LEDs
The 9T425-16, 9T427-16, and 9T428-16 use LANVIEW Ð the Cabletron Systems
built-in visual diagnostic and status monitoring system. With LANVIEW LEDs,
you can quickly identify the device, port, and physical layer status at a glance.
Hot Swapping
The 9T425-16, 9T427-16, and 9T428-16 can be installed or removed from the
chassis while the SmartSwitch 9000 is powered up without affecting the operation
of the remaining modules in the chassis.
RMON
Five RMON groups are supported in the 9T425-16, 9T427-16, and 9T428-16:
Statistics, History, Alarms, Events, and Token Ring.
Broadcast Thresholds
The 9T425-16, 9T427-16, and 9T428-16 contain broadcasts in the event of a
broadcast storm.
For a complete list of supported MIBs, refer to the release notes provided in
the module package.
NOTE