Nortel BayStack 5510-24T Specifications

Also see for 5510: Installation Configuration Engineering guide

Contents

2The BayStack 5510-24T Switch offers 24 10/100/1000BASE-T RJ-45 ports for desktopswitching and two built-in GBIC ports for uplink. Port 23 and Port 24 offer configurationflexibility as either a 10/100/1000 or a built-in SFP GBIC port. Both BayStack 5510-24T and5510-48T switches may be combined in a single stack for maximum flexibility.Innovative FAST stacking designNortel Networks innovative FAST (Flexible Advanced Stacking Technology) stacking designof the BayStack 5510 allows for simultaneous bi-directional traffic flow on each stacking port(Figure 2). In a full stack, this design yields up to 640 Gbps—the highest stacking bandwidthin the industry today.Switch fabric architecture offering non-blocking wire-speed performanceThe BayStack 5510 Switches have a high-performance Layer 3 switching fabric with amaximum of 160 Gbps forwarding bandwidth and wire-speed performance. The forwarding ratefor the BayStack 5510-48T is 71.4 Mpps (million packets per second) and for the BayStack5510-24T is 35.7 MppsLayer 3 IP routingThe BayStack 5510 Switch architecture supports wire-speed Layer 3 IP routing across thestack with static and local route support.The BayStack 5510 switches support high-performance wire-speed IP routing betweenVLANs. IP routing with static routes at the edge improves the network performance as thepackets do not have to go to the core and the routing takes place within the switch or stack.The BayStack 5510 Switches support the DHCP (Dynamic Host Configuration Protocol)Relay feature that provides the system with the ability to relay DHCP requests to the DHCPserver and eliminates the need for a DHCP server on every subnet. It forwards a request foran IP address from a client to a DHCP server across subnets.Software feature enhancements are planned to include support for routing protocols such asRouting Information Protocol (RIP v1/v2)†.Compact form factorThe BayStack 5510 Switches are offered in acompact one-rack unit high design. An eightunit stack provides up to 384 10/100/1000ports. This allows for significant space andcost savings in the wiring closet.Unit replacement featureIn the unlikely event that a switch fails in astack, the affected switch can easily bereplaced without disrupting the stack.Using the unit replacement feature, theconfiguration of the failed switch may becopied from a server to the new switch. Theswitch can then be put back in the stack andthe stack is rebuilt automatically withoutservice interruption.Up to 16 built-in GBIC ports in a stackBayStack 5510 Switches have two built-inSFP GBIC ports for dedicated uplinkconnectivity to network core switches such asthe Passport* 8600. This doubles the uplinkbandwidth as GBIC ports are not required80 Gbps80 Gbps80 Gbps80 Gbps80 Gbps80 Gbps80 Gbps80 Gbps640 GbpsMax. stackingbandwidth forthe stack80 Gbpsstacking bandwidthper switch40 Gbps40 GbpsDownstream trafficUpstream traffic40 Gbps40 Gbps40 Gbps40 Gbps40 Gbps40 Gbps40 Gbps40 Gbps40 GbpsFigure 2. Innovative FAST stacking architecture—supporting up and downstream trafficAs shown here, a unitcan simultaneouslyhave traffic flow toeach adjacent unit at40 Gbps full duplex.Nortel Networks unique FAST stack-ing design supports an optimal dataflow across the stack using a shortestpath algorithm.Most vendors today employ a traditionalring architecture, meaning that a packettravels on the ring in only one direction. Forexample, in a stack of eight switches, if apacket needs to go from unit 2 to unit 3,it can get there in a single hop. But if apacket needs to go from unit 3 to unit 2,then it has to traverse from 3 to 4, 4 to 5,5 to 6, and so on until it reaches unit 2.This requires seven hops.Nortel Networks FAST stack design usesthe shortest past algorithm, which meansthat the packet would traverse directlyfrom unit 3 to unit 2 in a single hop.