NEC N8406-022 manual Priority bridge, Designated bridge

Page 28

The switch software can be set to use the IEEE 802.1w Rapid Spanning Tree Protocol (RSTP) or the IEEE 802.1s Multiple Spanning Tree Protocol (MSTP). If RSTP/MSTP is turned on, you can view the following RSTP bridge information for the Spanning Tree Group:

•Status of Uplink Fast (upfast)

•Current root MAC address

•Path-Cost

•Port

•Hello interval

•Maximum age value

•Forwarding delay

•Aging time

You can also refer to the following port-specific RSTP information:

•Port number and priority

•Cost

•State

•Role

•Designated bridge and port

•Link type

The following table describes the STP parameters in RSTP or MSTP mode.

Table 20 Rapid Spanning Tree parameter descriptions

Parameter

Description

Current Root

Shows information about the root bridge for the Spanning Tree. Information includes the

 

priority (hex) and MAC address of the root.

Path-Cost

Path-cost is the total path cost to the root bridge. It is the summation of the path cost

 

between bridges (up to the root bridge).

Port

The current root port refers to the port on the switch that receives data from the current

 

root. Zero (0) indicates the root bridge of the STP.

Priority (bridge)

The bridge priority parameter controls which bridge on the network will become the STP

 

root bridge.

Hello

The hello time parameter specifies, in seconds, how often the root bridge transmits a

 

configurationbridge protocol data unit (BPDU). Any bridge that is not the root bridge uses

 

the root bridge hello value.

MaxAge

The maximum age parameter specifies, in seconds, the maximum time the bridge waits

 

without receiving a configuration bridge protocol data unit before it reconfigures the STP

 

network.

FwdDel

The forward delay parameter specifies, in seconds, the amount of time that a bridge port

 

has to wait before it changes from learning state to forwarding state.

Aging

The aging time parameter specifies, in seconds, the amount of time the bridge waits

 

without receiving a packet from a station before removing the station from the

 

Forwarding Database.

Priority (port)

The port priority parameter helps determine which bridge port becomes the designated

 

port. In a network topology that has multiple bridge ports connected to a single segment,

 

the port with the lowest port priority becomes the designated port for the segment.

Cost

The port path cost parameter is used to help determine the designated port for a

 

segment. Generally speaking, the faster the port, the lower the path cost. A setting of

 

zero (0) indicates that the cost will be set to the appropriate default after the link speed

 

has been auto-negotiated.

State

Shows the current state of the port. The State field in RSTP/MSTP mode can be one of

 

the following: Discarding (DISC), Learning (LRN), Forwarding (FWD), or

 

Disabled (DSB).

Role

Shows the current role of this port in the Spanning Tree. The port role can be one of the

 

following: Designated (DESG), Root (ROOT), Alternate (ALTN), Backup (BKUP), Master

 

(MAST), or Unknown (UNK).

Designated bridge

Shows information about the bridge connected to each port, if applicable. Information

 

includes the priority (hex) and MAC address of the Designated Bridge.

Designated port

The port ID of the port on the Designated Bridge to which this port is connected.

Type

Type of link connected to the port, and whether the port is an edge port. Link type values

 

are AUTO, P2P, or SHARED.

Information Commands 28

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Contents N8406-022 1Gb Intelligent L2 Switch Page Contents Statistics commands Operations Commands Connecting to the switch Iscli ReferenceIntroduction Additional referencesSetting an IP address Telnet 1Gb Intelligent L2 Switch IP addressEstablishing a Telnet connection Establishing an SSH connectionAccessing the switch # ssh user@1Gb Intelligent L2 Switch IP addressIdle timeout Typographical conventionsPing IP address Show portchannel 1-12hashinformationShow ip interface Show spanning-tree stpIscli Command Modes Accessing the IscliIscli basics Global commands Command line interface shortcuts Command abbreviationSwitchconfig# spanning-tree stp 1 bridge hello Switchconfig# sp stp 1 br hInformation Commands System Information commands SNMPv3 Information commandsSNMPv3 USM User Table information SNMPv3 View Table informationUser Name ProtocolSNMPv3 Access Table information View NameGroup Name PrefixSNMPv3 Group Table information SNMPv3 Community Table informationSec Model Index Name User Name Tag Trap1 Public V1v2only V1v2trapSNMPv3 Target Parameters Table information SNMPv3 Target Address Table informationSec Level SNMPv3 Notify Table information NameTag V1v2trapv1v2trapShow snmp-server v3 Command mode All SNMPv3 dumpSystem information Show recent syslog messages Usernames Enabled Oper Disabled Admin Always EnabledSystem user information Layer 2 information FDB information commands Show all FDB informationSpanning Tree information Show spanning-tree stp 1-32informationRapid Spanning Tree and Multiple Spanning Tree information Priority bridge Designated bridgeCommon Internal Spanning Tree information Desg 8000-000342fa3b80 8001 P2P, Edge 128 2000Desg 8000-000342fa3b80 8002 128 2000 128 2000Cist Root Disabled DSBDiscarding DISC, Learning LRN, Forwarding FWD, or Trunk group information Trunk group 1, Enabled port state STG 1 forwardingVlan information Layer 3 information ARP informationShow layer3 information Command mode All IP informationShow all ARP entry information ARP address list informationIgmp multicast group information Igmp multicast router port informationRmon Information Rmon history informationShow rmon alarm Rmon alarm informationInterval Rmon event information Show rmon eventLink status information Port Tag Rmon Pvid Port informationVLANs Logical Port to GEA Port mapping Show geaport Command mode AllUplink Failure Detection information Information dump Statistics commands Port StatisticsBridging statistics Ethernet statisticsDot3StatsAlignmentErrors Dot3StatsFCSErrorsDot3StatsInternalMacTransmitError Dot3StatsSingleCollisionFramesInterface statistics Internet Protocol IP statistics Show interface gigabitethernet port number ip-countersLayer 2 statistics Link statisticsFDB statistics Show interface gigabitethernet port number link-countersLayer 3 statistics IP statisticsARP statistics ARP statistics ArpEntriesCur ArpEntriesHighWaterIcmp statistics DNS statisticsDNS statistics DnsInRequests DnsOutRequests DnsBadRequests TCP statistics UDP statistics Management Processor statistics Igmp Multicast Group statisticsShow mp tcp-block Show mp udp-blockAll UDP allocated control blocks Listen 10ad41e8/10ad5790161 CPU statistics Show snmp-server counters Command mode All except User ExecSnmp statistics Decoding Snmp messages received Show ntp counters Command mode All NTP statisticsUplink Failure Detection statistics Statistics dumpConfiguration Commands Saving the configurationSystem configuration Viewing and saving changesSystem host log configuration Secure Shell Server configuration Radius server configuration TACACS+ server configuration NTP server configuration System Snmp configuration SNMPv3 configuration User Security Model configuration Privacy-password passwordPrivacy-protocol desnone No snmp-server userSNMPv3 View configuration View-based Access Control Model configurationSNMPv3 Group configuration SNMPv3 Community Table configurationSNMPv3 Target Address Table configuration SNMPv3 Target Parameters Table configurationSystem Access configuration SNMPv3 Notify Table configurationManagement Networks configuration User Access Control configuration User ID configurationHttps Access configuration Port configuration Temporarily disabling a portLayer 2 configuration Port link configurationSpanning-tree mrst Mode Spanning-tree mrst EnableSpanning-tree mstp NameCommon Internal Spanning Tree configuration Cist bridge configurationCist port configuration Spanning Tree configuration Bridge Spanning Tree configuration Spanning Tree port configuration Trunk configuration Forwarding Database configurationStatic FDB configuration Layer 3 configuration Vlan configurationIP interface configuration Default Gateway configurationIgmp configuration Address Resolution Protocol configurationIgmp snooping configuration Igmp static multicast router configuration Igmp filtering configurationIgmp filtering port configuration Domain Name System configurationIgmp filter definition Rmon history configuration Remote Monitoring configurationRmon event configuration Rmon alarm configuration Port mirroring Uplink Failure Detection configurationPort-based port mirroring Configuration Dump Failure Detection Pair configurationLink to Monitor configuration Link to Disable configurationSaving the active switch configuration Restoring the active switch configurationOperations Commands Operations-level port optionsBoot Options Updating the switch software imageDownloading new software to the switch Router# copy tftp image1image2boot-imageUploading a software image from the switch Routerconfig# boot image image1image2Switch# copy image1image2boot-image tftp Selecting a software image to runResetting the switch Selecting a configuration blockAccessing the AOS CLI System maintenance Maintenance CommandsForwarding Database maintenance ARP cache maintenance Debugging optionsIgmp Mrouter maintenance Igmp Snooping maintenanceUuencode flash dump Panic command Switch# copy flash-dump tftp server filenameSwitch# clear flash-dump Tftp system dump putUnscheduled system dumps Index
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N8406-022 specifications

The NEC N8406-022 is a robust and versatile networking device designed primarily for organizations requiring high-performance connectivity solutions. As part of NEC's extensive portfolio of networking equipment, the N8406-022 is engineered to address the demands of modern enterprise environments, ensuring seamless communication and data processing capabilities.

One of the key features of the N8406-022 is its multi-layer switching functionality. This device supports Layer 2 and Layer 3 switching, allowing for efficient data routing and reducing latency within local area networks (LANs). This capability is particularly beneficial for businesses that rely on real-time data access and transfer, such as those in financial services, media, and telecommunications.

The N8406-022 is equipped with advanced Quality of Service (QoS) features that help prioritize critical network traffic. This means that voice and video data packets can be given precedence over less time-sensitive information, ensuring that essential communication remains clear and uninterrupted. This is crucial for organizations leveraging VoIP and video conferencing solutions.

In terms of connectivity, the NEC N8406-022 offers a variety of ports, including multiple Gigabit Ethernet ports, which facilitate high-speed data transfer and enable seamless integration into existing network infrastructures. The device may also include 10 Gigabit SFP+ ports, providing the flexibility for high-capacity uplinks to support bandwidth-intensive applications and storage solutions.

Security is another focal point of the NEC N8406-022, with integrated features such as VLAN support, access control lists (ACLs), and port security measures. These capabilities protect sensitive data from unauthorized access and ensure that only legitimate users and devices can connect to the network.

Moreover, the N8406-022 often incorporates advanced energy-efficient technologies that minimize power consumption without compromising performance. This not only contributes to operational cost savings but also supports organizations in their sustainability efforts.

With its combination of performance, security, and energy efficiency, the NEC N8406-022 stands out as a reliable networking solution suitable for a wide range of enterprises looking to enhance their connectivity and operational efficiency. Whether deployed in data centers or as part of a corporate network, this device is built to meet the evolving demands of today’s digital landscape.
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