C
HAPTER
8
| Spanning Tree Algorithm
Displaying Interface Settings for STA
– 230 –
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 225
.
◆
Oper Edge Port
– This parameter is initialized to the setting for Admin
Edge Port in STA Port Configuration on
page 225
(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 connecting the 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, bridge ports, or LANs fail or are removed. The role is set to
disabled (i.e.,
disabled
port) if a port has no role within the spanning
tree.
Содержание ECS4810-12M Layer 2
Страница 1: ...Management Guide www edge core com ECS4810 12M Layer 2 Gigabit Ethernet Switch...
Страница 2: ......
Страница 4: ......
Страница 6: ...ABOUT THIS GUIDE 6...
Страница 54: ...SECTION I Getting Started 54...
Страница 64: ...CHAPTER 1 Introduction System Defaults 64...
Страница 82: ...CHAPTER 2 Initial Switch Configuration Managing System Files 82...
Страница 84: ...SECTION II Web Configuration 84...
Страница 102: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 102...
Страница 206: ...CHAPTER 6 VLAN Configuration Configuring VLAN Mirroring 206...
Страница 256: ...CHAPTER 11 Class of Service Layer 3 4 Priority Settings 256...
Страница 378: ...CHAPTER 14 Security Measures DHCP Snooping 378...
Страница 520: ...CHAPTER 16 IP Configuration Setting the Switch s IP Address IP Version 6 520...
Страница 528: ...CHAPTER 17 IP Services Displaying the DNS Cache 528...
Страница 586: ...CHAPTER 19 Using the Command Line Interface CLI Command Groups 586...
Страница 676: ...CHAPTER 22 SNMP Commands 676...
Страница 684: ...CHAPTER 23 Remote Monitoring Commands 684...
Страница 816: ...CHAPTER 27 Access Control Lists ACL Information 816...
Страница 866: ...CHAPTER 30 Port Mirroring Commands RSPAN Mirroring Commands 866...
Страница 883: ...CHAPTER 32 Automatic Traffic Control Commands 883 Trap Traffic Release Disabled Disabled Console...
Страница 884: ...CHAPTER 32 Automatic Traffic Control Commands 884...
Страница 890: ...CHAPTER 33 Address Table Commands 890...
Страница 986: ...CHAPTER 37 Class of Service Commands Priority Commands Layer 3 and 4 986...
Страница 1006: ...CHAPTER 38 Quality of Service Commands 1006...
Страница 1068: ...CHAPTER 39 Multicast Filtering Commands Multicast VLAN Registration 1068...
Страница 1092: ...CHAPTER 40 LLDP Commands 1092...
Страница 1134: ...CHAPTER 41 CFM Commands 1134...
Страница 1154: ...CHAPTER 43 Domain Name Service Commands 1154...
Страница 1160: ...CHAPTER 44 DHCP Commands DHCP Client 1160...
Страница 1194: ...CHAPTER 45 IP Interface Commands IPv6 Interface 1194...
Страница 1196: ...SECTION IV Appendices 1196...
Страница 1201: ...APPENDIX A Software Specifications Management Information Bases 1201 Trap RFC 1215 UDP MIB RFC 2013...
Страница 1202: ...APPENDIX A Software Specifications Management Information Bases 1202...
Страница 1224: ...COMMAND LIST 1224...
Страница 1234: ...INDEX 1234...
Страница 1235: ......
Страница 1236: ...ECS4810 12M E072011 ST R01 149100000142A...