Web Management Guide-R01
Table Of Contents
- How to Use This Guide
- Contents
- Figures
- Tables
- Getting Started
- Web Configuration
- Using the Web Interface
- Basic Management Tasks
- Displaying System Information
- Displaying Hardware/Software Versions
- Configuring Support for Jumbo Frames
- Displaying Bridge Extension Capabilities
- Managing System Files
- Setting the System Clock
- Configuring the Console Port
- Configuring Telnet Settings
- Displaying CPU Utilization
- Configuring CPU Guard
- Displaying Memory Utilization
- Resetting the System
- Interface Configuration
- VLAN Configuration
- Address Table Settings
- Spanning Tree Algorithm
- Congestion Control
- Class of Service
- Quality of Service
- VoIP Traffic Configuration
- Security Measures
- AAA (Authentication, Authorization and Accounting)
- Configuring User Accounts
- Web Authentication
- Network Access (MAC Address Authentication)
- Configuring HTTPS
- Configuring the Secure Shell
- Access Control Lists
- Filtering IP Addresses for Management Access
- Configuring Port Security
- Configuring 802.1X Port Authentication
- DoS Protection
- DHCP Snooping
- DHCPv6 Snooping
- ND Snooping
- IPv4 Source Guard
- IPv6 Source Guard
- ARP Inspection
- Application Filter
- Basic Administration Protocols
- Configuring Event Logging
- Link Layer Discovery Protocol
- Simple Network Management Protocol
- Configuring Global Settings for SNMP
- Setting Community Access Strings
- Setting the Local Engine ID
- Specifying a Remote Engine ID
- Setting SNMPv3 Views
- Configuring SNMPv3 Groups
- Configuring Local SNMPv3 Users
- Configuring Remote SNMPv3 Users
- Specifying Trap Managers
- Creating SNMP Notification Logs
- Showing SNMP Statistics
- Remote Monitoring
- Switch Clustering
- Setting a Time Range
- Ethernet Ring Protection Switching
- OAM Configuration
- UDLD Configuration
- LBD Configuration
- Multicast Filtering
- Overview
- Layer 2 IGMP (Snooping and Query for IPv4)
- Configuring IGMP Snooping and Query Parameters
- Specifying Static Interfaces for a Multicast Router
- Assigning Interfaces to Multicast Services
- Setting IGMP Snooping Status per Interface
- Filtering IGMP Packets on an Interface
- Displaying Multicast Groups Discovered by IGMP Snooping
- Displaying IGMP Snooping Statistics
- Filtering and Throttling IGMP Groups
- MLD Snooping (Snooping and Query for IPv6)
- Configuring MLD Snooping and Query Parameters
- Setting Immediate Leave Status for MLD Snooping per Interface
- Specifying Static Interfaces for an IPv6 Multicast Router
- Assigning Interfaces to IPv6 Multicast Services
- Filtering MLD Query Packets on an Interface
- Showing MLD Snooping Groups and Source List
- Displaying MLD Snooping Statistics
- Filtering and Throttling MLD Groups
- Multicast VLAN Registration for IPv4
- IP Tools
- IP Configuration
- General IP Routing
- IP Services
- Appendices
Chapter 7
| Spanning Tree Algorithm
Displaying Interface Settings for STA
– 217 –
■
Learning - Port has transmitted configuration messages for an interval set
by the Forward Delay parameter without receiving contradictory
information. Port address table is cleared, and the port begins learning
addresses.
■
Forwarding - Port forwards packets, and continues learning addresses.
The rules defining port status are:
■
A port on a network segment with no other STA compliant bridging device
is always forwarding.
■
If two ports of a switch are connected to the same segment and there is no
other STA device attached to this segment, the port with the smaller ID
forwards packets and the other is discarding.
■
All ports are discarding when the switch is booted, then some of them
change state to learning, and then to forwarding.
◆ Forward Transitions – The number of times this port has transitioned from the
Learning state to the Forwarding state.
◆ Designated Cost – The cost for a packet to travel from this port to the root in
the current Spanning Tree configuration. The slower the media, the higher the
cost.
◆ Designated Bridge – The bridge priority and MAC address of the device
through which this port must communicate to reach the root of the Spanning
Tree.
◆ Designated Port – The port priority and number of the port on the designated
bridging device through which this switch must communicate with the root of
the Spanning Tree.
◆ Oper Path Cost – The contribution of this port to the path cost of paths
towards the spanning tree root which include this port.
◆ Oper Link Type – The operational point-to-point status of the LAN segment
attached to this interface. This parameter is determined by manual
configuration or by auto-detection, as described for Admin Link Type in STA
Port Configuration on page 212.
◆ Oper Edge Port – This parameter is initialized to the setting for Admin Edge
Port in STA Port Configuration on page 212 (i.e., true or false), but will be set to
false if a BPDU is received, indicating that another bridge is attached to this
port.
◆ Port Role – Roles are assigned according to whether the port is part of the
active topology, that is the best port connecting a non-root bridge to the root
bridge (i.e., root port), connecting a LAN through the bridge to the root bridge
(i.e., designated port), is the MSTI regional root (i.e., master port), or is an
alternate or backup port that may provide connectivity if other bridges,