Cisco CATALYST 3920 24 PORT TOKEN RING SWITCH Specification Guide
Product Overview
Catalyst 3920 Token Ring Switch User Guide
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There are two levels of VLANs supported by the Catalyst 3920. The first level is the Token Ring
Concentrator Relay Function (TrCRF). This is the level of VLAN to which the ports are assigned.
The second level is the Token Ring Bridge Relay Function (TrBRF). This is the parent VLAN to
which TrCRF VLANs are assigned. Traffic is switched between ports in a TrCRF and bridged
between TrCRFs in a TrBRF.
Concentrator Relay Function (TrCRF). This is the level of VLAN to which the ports are assigned.
The second level is the Token Ring Bridge Relay Function (TrBRF). This is the parent VLAN to
which TrCRF VLANs are assigned. Traffic is switched between ports in a TrCRF and bridged
between TrCRFs in a TrBRF.
The Catalyst 3920 maintains certain configuration information and management statistics on a per
VLAN basis. Therefore, when you access VLAN-specific Catalyst 3920 configuration or
management panels (such as the Current Spanning Tree Information panel), you will be prompted
to specify the desired TrBRF or TrCRF.
VLAN basis. Therefore, when you access VLAN-specific Catalyst 3920 configuration or
management panels (such as the Current Spanning Tree Information panel), you will be prompted
to specify the desired TrBRF or TrCRF.
Configuration and Management
The Catalyst 3920 provides a series of menu-driven configuration and management panels that you
can access via a connected terminal attached to the EIA 232 management port, or from a remote
terminal via Telnet. Up to five Telnet sessions are permitted at any one time. In addition, you can do
the following:
can access via a connected terminal attached to the EIA 232 management port, or from a remote
terminal via Telnet. Up to five Telnet sessions are permitted at any one time. In addition, you can do
the following:
•
Manage the Catalyst 3920 using an SNMP-based manager
•
Monitor the Catalyst 3920 using an RMON agent or external monitoring device
SNMP-Based Management
The Catalyst 3920 can be managed via an SNMP manager. The Catalyst 3920 supports twelve
Management Information Bases (MIBs). Nine of the MIBs are standard MIBs, which are defined by
RFCs and are included with most SNMP management applications. Three of the MIBs are private
MIBs and can be obtained from CCO.
Management Information Bases (MIBs). Nine of the MIBs are standard MIBs, which are defined by
RFCs and are included with most SNMP management applications. Three of the MIBs are private
MIBs and can be obtained from CCO.
The standard MIBs supported are:
•
Management Information Base for Network Management of TCP/IP-based Internets: MIB-II
(RFC 1213)
(RFC 1213)
•
Evolution of Interfaces Group of MIB-II (RFC 1573)
•
Definitions of Managed Objects for Bridges (RFC 1493)
•
Token Ring Extensions to the Managed Objects for Bridges (RFC 1525)
•
IEEE 802.5 Token Ring MIB (RFC 1748)
•
RMON MIB/Token Ring Extensions (RFC 1757/1513) partial support
•
IEEE 802.5 DTR Concentrator MIB
•
IEEE 802.5 DTR MAC MIB
The private MIBs supported are:
•
Catalyst 3900 Proprietary MIB
•
Cisco VLAN Trunking Protocol MIB
•
Cisco Discovery Protocol MIB
Most user configurable variables are supported in either the standard MIBs or private MIBs.
Configuration settings, such as port attributes, and operational information, such as address tables,
are fully accessible through SNMP. Certain other settings, such as passwords and console settings,
cannot be viewed or modified via SNMP for security reasons.
Configuration settings, such as port attributes, and operational information, such as address tables,
are fully accessible through SNMP. Certain other settings, such as passwords and console settings,
cannot be viewed or modified via SNMP for security reasons.