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TOKEN RING RMON MIB Because of the popularity of the Ethernet RMON standard, several Token Ring vendors established the RFC 1513 Internet standard. Four of the categories established integrate the statistics and history groups with Token Ring parameters (see Exhibit 7-1-4). The Token Ring media access control (MAC) level and promiscuous statistics categories make up the Token-Ring specific categories within statistics and history. The other four categories address the inherent management functionality within the Token Ring standard. For example, the Token Ring standard designates an active monitor for each ring that notes behavior on the overall ring. The IEEE 802.5 standard also provides for a beacon frame that detects errors on the ring. Ring Station Control Table. This category serves as the keeper of status information for each ring being monitored. It looks at the ring state, active monitor, and number of active stations. Ring Station Table. This category gathers information for each station (e.g., error statistics ) on a local ring. Because the token circulates around the ring constantly, it is necessary to monitor the health of each station. This category tracks beaconing stations and the active monitor. Ring Station Order. This category collects information in logical ring order sequence. It is, therefore, critical to providing information about the performance of a particular ring. Ring Station Configuration Control. This category collects station configuration information. It examines:
Using this information, the probe may actively remove any station on the monitored ring. This category provides fault and configuration information to network administrators. Source Routing. This category measures source routing statistics. Source routing enables the determination of a fixed route between the source ring and the final destination ring. It provides data on the number of hops between rings and whether the packet originated on the ring or is on its way to the final destination. THE FUTURE OF RMON RMON has been quite successful, and RMON2 is currently in draft form and scheduled for approval in late 1996. RMON2, unlike many other standards, is interoperable with RMON. RMON2 adds several new groups and provides a more efficient software product. Exhibit 7-1-5 shows a tree diagram for RMON2.
New Groups in RMON2 Following is a list of the new groups in RMON2 and their functions:
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