NEC N8406-022 manual Cist Root, Discarding DISC, Learning LRN, Forwarding FWD, or, Disabled DSB

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

•Port number and priority

•Cost

•State

•Role

•Designated bridge and port

•Hello interval

•Link type and port type

The following table describes the CIST parameters.

Table 21 Common Internal Spanning Tree parameter descriptions

Parameter

Description

CIST Root

Shows information about the root bridge for the Common Internal Spanning Tree

 

(CIST). Values on this row of information refer to the CIST root.

CIST Regional Root

Shows information about the root bridge for this MSTP region. Values on this row

 

of information refer to the regional root.

Priority (bridge)

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

 

the STP root bridge.

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.

Hops

Shows the maximum number of bridge hops allowed before a packet is dropped.

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 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.

 

Information includes the port priority (hex) and the port number (hex).

Hello

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

 

transmits a configuration bridge protocol data unit (BPDU). Any bridge that is not

 

the root bridge uses the root bridge hello value.

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 30

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Contents N8406-022 1Gb Intelligent L2 Switch Page Contents Statistics commands Operations Commands Introduction Connecting to the switchIscli Reference Additional referencesEstablishing a Telnet connection Setting an IP addressTelnet 1Gb Intelligent L2 Switch IP address Establishing an SSH connectionAccessing the switch # ssh user@1Gb Intelligent L2 Switch IP addressPing IP address Idle timeoutTypographical conventions Show portchannel 1-12hashinformationShow ip interface Show spanning-tree stpAccessing the Iscli Iscli Command ModesIscli basics Global commands Switchconfig# spanning-tree stp 1 bridge hello Command line interface shortcutsCommand abbreviation Switchconfig# sp stp 1 br hInformation Commands System Information commands SNMPv3 Information commandsUser Name SNMPv3 USM User Table informationSNMPv3 View Table information ProtocolGroup Name SNMPv3 Access Table informationView Name PrefixSec Model SNMPv3 Group Table informationSNMPv3 Community Table information Index Name User Name Tag Trap1 Public V1v2only V1v2trapSNMPv3 Target Address Table information SNMPv3 Target Parameters Table informationSec Level SNMPv3 Notify Table information NameTag V1v2trapv1v2trapShow snmp-server v3 Command mode All SNMPv3 dumpSystem information Usernames Enabled Oper Disabled Admin Always Enabled Show recent syslog messagesSystem 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 bridgeDesg 8000-000342fa3b80 8002 128 2000 Common Internal Spanning Tree informationDesg 8000-000342fa3b80 8001 P2P, Edge 128 2000 128 2000Disabled DSB Cist RootDiscarding DISC, Learning LRN, Forwarding FWD, or Trunk group 1, Enabled port state STG 1 forwarding Trunk group informationVlan information Layer 3 information ARP informationShow all ARP entry information Show layer3 information Command mode AllIP information ARP address list informationRmon Information Igmp multicast group informationIgmp multicast router port information Rmon history informationRmon alarm information Show rmon alarmInterval Rmon event information Show rmon eventLink status information Port information Port Tag Rmon PvidVLANs Show geaport Command mode All Logical Port to GEA Port mappingUplink Failure Detection information Information dump Statistics commands Port StatisticsBridging statistics Ethernet statisticsDot3StatsInternalMacTransmitError Dot3StatsAlignmentErrorsDot3StatsFCSErrors Dot3StatsSingleCollisionFramesInterface statistics Internet Protocol IP statistics Show interface gigabitethernet port number ip-countersFDB statistics Layer 2 statisticsLink statistics Show interface gigabitethernet port number link-countersLayer 3 statistics IP statisticsARP statistics ARP statistics ArpEntriesCur ArpEntriesHighWaterDNS statistics Icmp statisticsDNS statistics DnsInRequests DnsOutRequests DnsBadRequests TCP statistics UDP statistics Show mp tcp-block Management Processor statisticsIgmp Multicast Group statistics Show mp udp-block10ad41e8/10ad5790 All UDP allocated control blocks Listen161 Show snmp-server counters Command mode All except User Exec CPU statisticsSnmp statistics Decoding Snmp messages received Show ntp counters Command mode All NTP statisticsUplink Failure Detection statistics Statistics dumpSystem configuration Configuration CommandsSaving the 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 Privacy-protocol desnone User Security Model configurationPrivacy-password password 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 configurationSNMPv3 Notify Table configuration System Access configurationManagement Networks configuration User Access Control configuration User ID configurationHttps Access configuration Port configuration Temporarily disabling a portLayer 2 configuration Port link configurationSpanning-tree mstp Spanning-tree mrst ModeSpanning-tree mrst Enable NameCommon Internal Spanning Tree configuration Cist bridge configurationCist port configuration Spanning Tree configuration Bridge Spanning Tree configuration Spanning Tree port configuration Forwarding Database configuration Trunk configurationStatic FDB configuration Layer 3 configuration Vlan configurationIP interface configuration Default Gateway configurationAddress Resolution Protocol configuration Igmp configurationIgmp snooping configuration Igmp static multicast router configuration Igmp filtering configurationDomain Name System configuration Igmp filtering port configurationIgmp filter definition Remote Monitoring configuration Rmon history configurationRmon event configuration Rmon alarm configuration Uplink Failure Detection configuration Port mirroringPort-based port mirroring Link to Monitor configuration Configuration DumpFailure Detection Pair configuration Link to Disable configurationSaving the active switch configuration Restoring the active switch configurationOperations Commands Operations-level port optionsDownloading new software to the switch Boot OptionsUpdating the switch software image Router# copy tftp image1image2boot-imageSwitch# copy image1image2boot-image tftp Uploading a software image from the switchRouterconfig# boot image image1image2 Selecting a software image to runSelecting a configuration block Resetting the switchAccessing the AOS CLI Maintenance Commands System maintenanceForwarding Database maintenance ARP cache maintenance Debugging optionsIgmp Snooping maintenance Igmp Mrouter maintenanceUuencode flash dump Switch# clear flash-dump Panic commandSwitch# copy flash-dump tftp server filename 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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