Nortel BayStack 425-24T Specifications

Also see for 425 series: Cli manual

Contents

Nortel BayStack 425-24T Specifications Manual pdf 3 page image

3speed. Each of the switched ports canalso automatically detect and supportfull-duplex connections to servers, power-user end stations or other switches, aswell as half-duplex connections to legacydevices or hubs.Custom Auto NegotiationAdvertisements (CANA)CANA enables the network manager totune the autonegotiation capabilities ofany particular Ethernet port. The capa-bilities include half-duplex and full-duplex modes with speeds of 10, 100and 1000 Mbps. This feature enablesthe network manager to determinewhich capabilities should be set as themaximum supported on the networkand saves the network manager fromhaving to go to each workstation andswitch to configure a “fixed” speed. Theswitch can then negotiate with theconnected device for the highest commoncapabilities according to the parametersdefined by CANA for that port. This canbe particularly useful where the networkmanager wished to limit the maximumspeed or duplex due to cabling limita-tions or business requirements.High-density stackingarchitectureThe plug-and-play stacking architectureof the Ethernet Switch 425 permits theinter-connection of up to eight switcheswith stacking cables into a single manage-able entity of up to 384 10/100-Mbpsports. Two built-in Gigabit stackingports in the rear of the switch provideeasy connections to other members ofthe stack; there is no need to purchase acascade module or use an uplink portfor stacking.This scalable stacking architecture of theEthernet Switch 425 protects the networkinvestment as business needs change orgrow. Enabling users to increase the portdensity at the wiring closet as the busi-ness expands as well as providing highavailability through features such asNortel’s Distributed Multi-Link Trunking(DMLT) are some of the key advantagesof Nortel’s stacking technology.The Ethernet Switch 425-24T andEthernet Switch 425-48T can be stackedin combination as of version 3.6 softwareto deliver added flexibility for customerconfigurations. To further enhance theflexibility of stacking, the Ethernet Switch425-24T switch can be stacked usingversion 3.1 or earlier software in anycombination up to a maximum ofeight units.High-speed uplink portsThe Ethernet Switch 425 switches offertwo built-in combo uplink ports (ports25 and 26 on the Ethernet Switch425-24T and ports 49 and 50 on theEthernet Switch 425-48T) in the frontof the unit that provide high-speedconnectivity to backbone switches orservers. Each combo port consists of oneSFP GBIC (Small Form Factor PluggableGigabit Interface Converter) port andone 10/100/1000BASE-T port. Eachcombo port autosenses between the SFPGBIC and the 10/100/1000BASE-Tport and will enable either the SFP portor the 10/100/1000BASE-T portdepending on the presence of a link. Ina stack of eight Ethernet Switch 425products, up to eight uplink ports canbe used, delivering up to 16 Gbps ofuplink bandwidth.Layer 2 featuresVLAN supportThe Ethernet Switch 425 family ofproducts supports up to a maximum of255 port-based VLANs which can beestablished for each switch, to extendthe broadcast domain and segmentnetwork traffic for higher network effi-ciency. The 255 VLANs can be config-ured on a standalone switch or acrossthe stack. IEEE 802.1Q VLAN Trunkingis supported on every port of the switch,allowing efficient means of transportingbroadcast domains across switches.Additionally, the Ethernet Switch 425provides the ability to have both taggedand untagged frames on the same portfor easy traffic segmentation withminimal setup.Figure 4. The plug-and-playarchitecture allows easy expansionand management as a single unitComboPort 26 ComboPort 25Figure 5. Each combo port auto-senses between 1 SFP uplink port and1 10/100/1000BASE-T port