
C
HAPTER
8
| Spanning Tree Algorithm
Displaying Interface Settings for STA
– 255 –
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
.
◆
Oper Edge Port
– This parameter is initialized to the setting for Admin
Edge Port in STA Port Configuration on
(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, 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 ECS4110-28T
Страница 1: ...Management Guide www edge core com ECS4110 28T 28P 52T 52P 28 52 Port Gigabit Ethernet Layer 2 Switch...
Страница 2: ......
Страница 4: ......
Страница 63: ...FIGURES 63 Figure 428 Configuring VLAN Translation 1177...
Страница 64: ...FIGURES 64...
Страница 72: ...TABLES 72...
Страница 74: ...SECTION I Getting Started 74...
Страница 102: ...SECTION II Web Configuration 102 General IP Routing on page 679...
Страница 154: ...CHAPTER 4 Basic Management Tasks Resetting the System 154...
Страница 198: ...CHAPTER 5 Interface Configuration VLAN Trunking 198 Figure 65 Configuring VLAN Trunking...
Страница 272: ...CHAPTER 9 Congestion Control Automatic Traffic Control 272...
Страница 286: ...CHAPTER 10 Class of Service Layer 3 4 Priority Settings 286...
Страница 420: ...CHAPTER 13 Security Measures DHCP Snooping 420...
Страница 566: ...CHAPTER 14 Basic Administration Protocols OAM Configuration 566...
Страница 638: ...CHAPTER 15 Multicast Filtering Multicast VLAN Registration for IPv6 638...
Страница 662: ...CHAPTER 16 IP Configuration Setting the Switch s IP Address IP Version 6 662...
Страница 678: ...CHAPTER 17 IP Services Configuring the PPPoE Intermediate Agent 678...
Страница 792: ...CHAPTER 21 System Management Commands Switch Clustering 792...
Страница 822: ...CHAPTER 23 Remote Monitoring Commands 822...
Страница 888: ...CHAPTER 24 Authentication Commands PPPoE Intermediate Agent 888...
Страница 968: ...CHAPTER 25 General Security Measures Port based Traffic Segmentation 968...
Страница 994: ...CHAPTER 26 Access Control Lists ACL Information 994...
Страница 1034: ...CHAPTER 28 Link Aggregation Commands Trunk Status Display Commands 1034...
Страница 1044: ...CHAPTER 29 Power over Ethernet Commands 1044...
Страница 1084: ...CHAPTER 33 UniDirectional Link Detection Commands 1084...
Страница 1090: ...CHAPTER 34 Address Table Commands 1090...
Страница 1194: ...CHAPTER 37 VLAN Commands Configuring Voice VLANs 1194...
Страница 1388: ...CHAPTER 42 CFM Commands Delay Measure Operations 1388...
Страница 1410: ...CHAPTER 44 Domain Name Service Commands 1410...
Страница 1420: ...CHAPTER 45 DHCP Commands DHCP Relay 1420...
Страница 1472: ...CHAPTER 46 IP Routing Commands IPv4 Commands 1472...
Страница 1474: ...SECTION IV Appendices 1474...
Страница 1502: ...COMMAND LIST 1502...
Страница 1513: ......
Страница 1514: ...ECS4110 28T ECS4110 28P ECS4110 52T ECS4110 52P E072014 ST R02 150200000929A...