up gradation, maintenance and buyback of existing switching network up gradation, maintenance and buyback of existing switching network , upgradation, maintenance and buyback of existing switching network , upgradation, maintenance and buyback of d-link dgs3627g 2 numbers without sfp module high performance managed stackable core/data center switch - 48-port proposed switch should have 48 ports of 1g/10g/25g which can accommodate 1g transceivers, 10g transceivers & 25g fiber transceivers proposed switch should have at least 4 ports of 40g/100g for uplink switch should support internal hot swappable redundant power supplies. switch shall have sd card slot/usb/external flash for easy file store & restoration like firmware, configuration file, boot image, syslog etc.switching capacity should be wire speed with a min of 3.2tbps of switching capacity switching throughput (forwarding rate) should be a min of 1bpps to be wire speed proposed switch shall support min 82,000 mac addresses proposed switch shall support min 82,000 ipv4 route entries switch should support virtual stacking of min 4 units per stack. stacking bandwidth should be at least 200gbps per switch. stacking ports should be separate and in addition to the above-mentioned ports. necessary cables/interfaces should be provided with each switch for stacking from day-1 the lan switch shall have ieee 802.1q vlan encapsulation and should support 4k vlans. it shall have support for detection of unidirectional links and to disable them to avoid problems such as spanning tree loops it shall support 802.1v protocol-based vlan should support mac based vlans should have 802.1d stp, 802.1w rstp and 802.1s mstp spanning tree protocol the switch should have 802.1ax link aggregation of 8 links per group and upto 8 groups per deviceport mirroring one to one/many to one, flow based mirroring & vlan mirroring the switch shall have the intelligence to detect the loop occurring from the unmanaged network segment switch should su