Cabletron Systems MMAC-Plus 9E312-12 User Manual

Also see for MMAC-Plus 9E312-12: Appendix

Contents

1-3FeaturesManagement Information Base (MIB) SupportThe 9E312-12 provides MIB support including:• RMON (RFC-1271)• IETF MIB II (RFC-1213)• IETF Bridge MIB (RFC-1493)and a host of other Cabletron Enterprise MIBs.INBThe 9E312-12 attaches to INB1 of the MMAC-Plus Backplane. The INB has acapacity of 2 Gbps to interconnect MMAC-Plus modules supporting Ethernet,FDDI, Token Ring, WAN and ATM networks. The INB transports fixed lengthdata blocks between modules in the MMAC-Plus hub using a Time DivisionMultiplexing (TDM) design. Within the INB there is a 64 bit wide data bus and aneight bit control management bus. Each module that attaches to the INB has anINB Network Interface Block (NIB). The INB NIB converts canonical frames tofixed length data blocks for transmission onto the INB. For data blocks receivedfrom the INB, the INB NIB reassembles the data blocks received from the INBback into canonical frames for transmission to the Fast Packet Switch (FPS) andultimately to the front panel port. The INB can time slice its bandwidth using oneof three methods. The default method is standard TDM round-robin bandwidtharbitration, the second method is for modules to reserve a specific amount ofbandwidth using MONARCH, Cabletron’s INB Bandwidth Arbitrator, the thirdmethod permits the lowest slot number to use any bandwidth not used by theprevious two methods.LANVIEW LEDsThe 9E312-12 uses LANVIEW – the Cabletron Systems built-in visual diagnosticand status monitoring system. With LANVIEW LEDs, you can quickly identify, ata glance, system status as well as the device, port, and physical layer status. TwoLEDs indicate the transmission and reception of data from the INB MMAC-PlusBackplane connection. Each of the 12 Ethernet front panel ports features twoLEDs per port to indicate the ports Administrative status (enabled/disabled),LINK status (Link/Nolink), and Data Activity (receiving and transmitting data).For a complete list of supported MIBs, refer to the release notes provided in the9E312-12 package.NOTE