Cabletron Systems TRFMIM-28 manual SmartSwitch ASIC, Vlan, Traditional Switch

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SmartSwitch ASIC

Operation

SmartSwitch ASIC

The SmartSwitch ASIC is a hardware-based switch design that is the key building block of the SmartSwitch 9000 hub. The SmartSwitch ASIC makes all filtering/ forwarding decisions in custom hardware as opposed to software, as in traditional bridges. This custom hardware enables the SmartSwitch ASIC to process over 750K frames per second. The SmartSwitch ASIC is designed to support up to 64 ports shared between the host processor, the INB backplane, and LAN/WAN interfaces on the front panel of SmartSwitch 9000 modules. The SmartSwitch ASIC can operate in two modes: as a traditional switch or as a SecureFast Switch (SFS).

Traditional Switch

When operating as a traditional switch, the SmartSwitch ASIC makes filtering/ forwarding decisions based on Destination Address (DA), with standard IEEE 802.1d learning.

VLAN

Modules within a MMAC chassis utilize connection-oriented SecureFast Switches (SFS) to create Virtual LANs, or VLANs.

A VLAN is a local area network of endpoints having full connectivity (sharing broadcast, multicast, and unicast packets) independent of any particular physical or geographical location. In other words, endpoints that share a virtual LAN appear to be on a single LAN segment regardless of their actual location. Changes to VLANs, (e.g., moving nodes) are accomplished via software, reducing network management time and expense.

VLANs extend direct communication between users beyond the constraints of a physical LAN segment by allowing the establishment of VLANs that encompass users on multiple physical LAN segments. This permits endpoints to be administratively grouped. For example, in Figure 3-2, the users on LANs A and B belong to the Finance group, however, they are physically removed from each other and as such cannot communicate directly. The VLAN solution places both LAN segments on the same VLAN; all endpoints appear and act as if they are on the same physical LAN.

Most VLAN implementations require a router for Inter-VLAN communication; Cabletron’s SecureFast VLAN operational model does not. Inter-VLAN communication is accomplished via multi-layer switches or optional traditional router.

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Contents 9032061-01 SmartSwitch 9H423-28 User’s GuidePage Copyright March 1998 by Cabletron Systems, Inc 35 Industrial Way FCC Notice VCCI NoticeDOC Notice DECLARATION OF CONFORMITY ADDENDUM Nexus House, Newbury Business ParkConformance to Directives/Product Standards Safety Information CLASS 1 LASER TRANSCEIVERSThe FPIM-05 and FPIM-07 are Class 1 Laser Products CLASS 1 LASER TRANSCEIVERS Laser Radiation and Connectors Page Introduction ContentsInstalling the 9H423-28 Module ChapterSpecifications Contentsviii Chapter IntroductionManagement FeaturesFast Packet Switching ProcessorThe 9H423-28 module provides MIB support including RMON RFC-1271 LANVIEW LEDs SMB CPU INB FAST ENET Figure 1-1. The 9H423-28 Module26X 25X FAST ENET 9H423-28Getting Help Related ManualsInstalling the 9H423-28 Module Installing an FEPIMUnpacking the Module User Accessible Components Setting the Module DIP Switch See the Cautions at the end of this table Table 2-1. Function of DIP SwitchInstalling the Module in the SmartSwitch 9000 Chassis Module Figure 2-3. Installing the ModulePlastic Tab Jack for ESD Wrist Strap Metal Back-PanelReset Switch The Reset SwitchInstalling the 9H423-28 Module Operation Operation ENIB/FENIBSmartSwitch ASIC Traditional SwitchVLAN VLAN Domains Fully-Meshed VLAN Domains SecureFast VLAN SwitchesSMB-1 Bus i960 CoreINB NIB System Management BusesSMB-10 Bus System Diagnostic ControllerDC/DC Converter INB InterfaceLowest Slot Number Level ITDM Arbitration LevelsITDM RAM Allocation Level Round Robin Arbitration LevelMonarch/Slave SmartSwitch 9000 Modules 3-10 System Status INB Transmit Port Receive LANVIEW LEDsINB Receive Port TransmitThe function of the INB Receive LEDs is listed in Table The function of the INB Transmit LEDs is listed in TableLANVIEW LEDs Table 4-5. Port Transmit LEDs The function of the Port Receive LEDs is listed in TableThe function of the Port Transmit LEDs is listed in Table Table 4-4. Port Receive LEDsLANVIEW LEDs Standards SpecificationsTechnical Specifications MemoryWeight SafetyService DimensionsStorage Temperature EnvironmentOperating Temperature 5 to 40 CSpecifications Appendix A FEPIM SpecificationsFE-100TX FE-100FXFEPIM Specifications FE-100FX
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