– 1047 –
31
L
OOPBACK
D
ETECTION
C
OMMANDS
The switch can be configured to detect general loopback conditions caused
by hardware problems or faulty protocol settings. When enabled, a control
frame is transmitted on the participating ports, and the switch monitors
inbound traffic to see if the frame is looped back.
U
SAGE
G
UIDELINES
◆
The default settings for the control frame transmit interval and recover
time may be adjusted to improve performance for your specific
environment. The shutdown mode may also need to be changed once
you determine what kind of packets are being looped back.
◆
General loopback detection provided by the command described in this
section and loopback detection provided by the spanning tree protocol
cannot both be enabled at the same time. If loopback detection is
enabled for the spanning tree protocol, general loopback detection
cannot be enabled on the same interface.
◆
When a loopback event is detected on an interface or when an interface
is released from a shutdown state caused by a loopback event, a trap
message is sent and the event recorded in the system log.
◆
Loopback detection must be enabled both globally and on an interface
for loopback detection to take effect.
Table 121: Loopback Detection Commands
Command
Function
Mode
loopback-detection
Enables loopback detection globally on the
switch or on a specified interface
GC, IC
loopback-detection
action
Specifies the response to take for a detected
loopback condition
GC
loopback-detection
recover-time
Specifies the interval to wait before releasing an
interface from shutdown state
GC
loopback-detection
transmit-interval
Specifies the interval at which to transmit
loopback detection control frames
GC
loopback detection
trap
Configures the switch to send a trap when a
loopback condition is detected or the switch
recover from a loopback
GC
loopback-detection
release
Manually releases all interfaces currently shut
down by the loopback detection feature
PE
show
loopback-detection
Shows loopback detection configuration settings
for the switch or for a specified interface
PE
Содержание ES3528MV2
Страница 1: ...Management Guide www edge core com ES3528MV2 ES3528MV2 DC 28 Port Fast Ethernet Layer 2 Switch...
Страница 2: ......
Страница 4: ......
Страница 48: ...CONTENTS 48...
Страница 68: ...SECTION I Getting Started 68...
Страница 78: ...CHAPTER 1 Introduction System Defaults 78...
Страница 96: ...SECTION II Web Configuration 96...
Страница 116: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 116...
Страница 148: ...CHAPTER 4 Basic Management Tasks Resetting the System 148...
Страница 192: ...CHAPTER 5 Interface Configuration VLAN Trunking 192 Figure 65 Configuring VLAN Trunking...
Страница 226: ...CHAPTER 6 VLAN Configuration Configuring VLAN Translation 226...
Страница 236: ...CHAPTER 7 Address Table Settings Configuring MAC Address Mirroring 236...
Страница 270: ...CHAPTER 9 Congestion Control Automatic Traffic Control 270...
Страница 300: ...CHAPTER 11 Quality of Service Attaching a Policy Map to a Port 300...
Страница 418: ...CHAPTER 13 Security Measures DHCP Snooping 418...
Страница 588: ...CHAPTER 15 IP Configuration Setting the Switch s IP Address IP Version 6 588...
Страница 606: ...CHAPTER 16 IP Services Configuring the PPPoE Intermediate Agent 606...
Страница 676: ...CHAPTER 17 Multicast Filtering Multicast VLAN Registration for IPv6 676...
Страница 772: ...CHAPTER 20 System Management Commands Switch Clustering 772...
Страница 802: ...CHAPTER 22 Remote Monitoring Commands 802...
Страница 808: ...CHAPTER 23 Flow Sampling Commands 808...
Страница 872: ...CHAPTER 24 Authentication Commands PPPoE Intermediate Agent 872...
Страница 950: ...CHAPTER 25 General Security Measures Port based Traffic Segmentation 950...
Страница 1002: ...CHAPTER 27 Interface Commands Power Savings 1002...
Страница 1016: ...CHAPTER 28 Link Aggregation Commands Trunk Status Display Commands 1016...
Страница 1046: ...CHAPTER 30 Congestion Control Commands Automatic Traffic Control Commands 1046...
Страница 1058: ...CHAPTER 32 UniDirectional Link Detection Commands 1058...
Страница 1064: ...CHAPTER 33 Address Table Commands 1064...
Страница 1124: ...CHAPTER 35 ERPS Commands 1124...
Страница 1168: ...CHAPTER 36 VLAN Commands Configuring Voice VLANs 1168...
Страница 1182: ...CHAPTER 37 Class of Service Commands Priority Commands Layer 3 and 4 1182...
Страница 1202: ...CHAPTER 38 Quality of Service Commands 1202...
Страница 1360: ...CHAPTER 41 CFM Commands Delay Measure Operations 1360...
Страница 1382: ...CHAPTER 43 Domain Name Service Commands 1382...
Страница 1440: ...SECTION IV Appendices 1440...
Страница 1468: ...COMMAND LIST 1468...
Страница 1479: ......
Страница 1480: ...ES3528MV2 ES3528MV2 DC E112013 ST R03...