MN700004 Rev 01 11. IntroductionOverviewESB26 is an integrated Ethernet switch based on DX200 hardware platform. The ESB26features a total of 26 Ethernet ports of types and placements as follows:P o r t P l a c e m e n t C o n n e c t o r T r a f f i c20 full duplex 10/100BaseT/TX Ethernet portsback panel AMP 2mm Z-packconnectors compatibledownlink2 full duplex 10/100BaseT/TX Ethernet portsfront panel RJ45 downlink/uplink2 1000Base-T ports front panel RJ45 downlink/uplink2 1000Base-SX ports front panel LC uplinkESB26 contains also one RS-232 interface (RJ45) on the front panel for managementpurposes.The two 1000Base-T ports support all the 10/100/1000 Mbit/s link speeds. Speed mixing issupported, too, e.g. it is possible to use one of the 1000Base-T ports in gigabit mode while theother runs in 100Mbit mode.The intended use of the ESB26 is to collect the Ethernet links of different computer units andpreprocessor units of DX200-based network elements, and allow access to them from theupper levels. The ESB26 can be used in all M98F DX200 based network elements. TheESB26 can be assembled into a place of ESB20/ESB20-A by using the existing cabling.NOTE The ESB26 is designed to operate in forced cooling M98F only.The two graphics below represent two examples of operational environments for the ESB26.As presented, the ESB26s are used to collect traffic from/to different computer units andpreprocessor units and forward it towards 3rd party L3 switches. It is important to note thatVLAN-technology is used in order to divide the different units into several broadcastdomains. It must also be noted that redundant paths do exists and Rapid STP (as according toIEEE 802.1w) is used in order to avoid loops.
