
C
HAPTER
24
| System Management Commands
Synchronous Ethernet
– 985 –
synce ssm ethernet
This command configures a port to receive/send Synchronization Status
Messages (SSM), and sets the priority used for this port in clock source
port selection. Use the
no
form to stop using clock selection based on SSM.
S
YNTAX
synce ssm ethernet
unit
/
port
[
priority
priority
]
no synce ssm
[
ethernet
unit
/
port
]
unit
- Unit identifier. (Range: 1)
port
- Port number. (Range: 25-28)
priority
- The priority used for clock source selection.
(Range: 1-65535)
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Global Configuration
C
OMMAND
U
SAGE
General Information
◆
SSM provides a mechanism for downstream SyncE devices to
synchronize with the Primary Reference Clock or the highest quality
clock available. If an upstream network failure breaks this link, the
synchronization function can take appropriate action based on SSM and
pre-set priorities to select an alternate source of synchronization.
◆
This command only enables a port to send/receive SSM. It does not
designate a specific port to be used as the clock source port. Use the
command to configure the clock source.
◆
Only SSM will be extracted from the Ethernet Synchronization Message
Channel (ESMC). No other information from the ESMC will be
forwarded. SSM will be sent out of the specified port indicating the
clock source selected by SSM or the manually configured clock source.
◆
The clock source port will not itself send out SSM. The other SSM-
enabled ports will only send out SSM if received on the clock source
port. SSM will be sent out of the other SSM-enabled ports once a
second. If SSM has not been received on the clock source port after five
seconds, the other SSM-enabled ports will stop sending SSM until a
new clock source is selected.
◆
If SSM is disabled for a port, the priority level will be restored to the
default value.
Mode Changes
◆
The switch can only be configured to use SSM for dynamic clock source
selection when the current selection mode is set to Manual. The mode
cannot be changed directly from SSM mode to Auto mode, or from Auto
mode to SSM mode.
Содержание ECS4660-28F
Страница 1: ...Management Guide www edge core com ECS4660 28F Layer 3 Gigabit Ethernet Switch...
Страница 2: ......
Страница 4: ......
Страница 12: ...ABOUT THIS GUIDE 12...
Страница 64: ...CONTENTS 64...
Страница 90: ...TABLES 90...
Страница 92: ...SECTION I Getting Started 92...
Страница 122: ...SECTION II Web Configuration 122 Multicast Routing on page 825...
Страница 148: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 148...
Страница 224: ...CHAPTER 5 Interface Configuration VLAN Trunking 224 Figure 68 Configuring VLAN Trunking...
Страница 262: ...CHAPTER 6 VLAN Configuration Configuring VLAN Translation 262...
Страница 304: ...CHAPTER 9 Congestion Control Automatic Traffic Control 304...
Страница 340: ...CHAPTER 11 Quality of Service Attaching a Policy Map to a Port 340...
Страница 452: ...CHAPTER 13 Security Measures DHCP Snooping 452...
Страница 740: ...CHAPTER 17 IP Services Configuring the PPPoE Intermediate Agent 740...
Страница 866: ...CHAPTER 21 Multicast Routing Configuring PIMv6 for IPv6 866...
Страница 882: ...CHAPTER 22 Using the Command Line Interface CLI Command Groups 882...
Страница 1024: ...CHAPTER 26 Remote Monitoring Commands 1024...
Страница 1030: ...CHAPTER 27 Flow Sampling Commands 1030...
Страница 1088: ...CHAPTER 28 Authentication Commands PPPoE Intermediate Agent 1088...
Страница 1162: ...CHAPTER 29 General Security Measures Configuring Port based Traffic Segmentation 1162...
Страница 1186: ...CHAPTER 30 Access Control Lists ACL Information 1186...
Страница 1214: ...CHAPTER 31 Interface Commands Transceiver Threshold Configuration 1214...
Страница 1238: ...CHAPTER 33 Port Mirroring Commands RSPAN Mirroring Commands 1238...
Страница 1258: ...CHAPTER 34 Congestion Control Commands Automatic Traffic Control Commands 1258...
Страница 1270: ...CHAPTER 36 UniDirectional Link Detection Commands 1270...
Страница 1276: ...CHAPTER 37 Address Table Commands 1276...
Страница 1336: ...CHAPTER 39 ERPS Commands 1336...
Страница 1386: ...CHAPTER 40 VLAN Commands Configuring Voice VLANs 1386...
Страница 1406: ...CHAPTER 41 Class of Service Commands Priority Commands Layer 3 and 4 1406...
Страница 1424: ...CHAPTER 42 Quality of Service Commands 1424...
Страница 1536: ...CHAPTER 43 Multicast Filtering Commands MLD Proxy Routing 1536...
Страница 1602: ...CHAPTER 45 CFM Commands Delay Measure Operations 1602...
Страница 1624: ...CHAPTER 47 Domain Name Service Commands 1624...
Страница 1646: ...CHAPTER 48 DHCP Commands DHCP Server 1646...
Страница 1974: ...SECTION IV Appendices 1974...
Страница 1980: ...APPENDIX A Software Specifications Management Information Bases 1980...
Страница 2020: ...ECS4660 28F E102013 ST R03 149100000140A...