MES53xx, MES33xx, MES23xx Ethernet Switch Series
86
console(config)#
Table 5.68. Global configuration mode commands
Command
Value/Default value
Action
loopback-detection enable
-/disabled
Enable loopback detection mechanism for the switch.
no loopback-detection
enable
Restore the default value.
loopback-detection
interval
seconds
seconds: (10-60)/30
seconds
Set the time interval between loopback frames.
-
seconds
- time interval between LBD frames.
no loopback-detection
interval
Restore the default value.
Ethernet or port group interface (interface range) configuration mode commands
Command line prompt in the Ethernet or port group interface configuration mode is as follows:
console#
configure
console(config)#
interface {gigabitethernet
gi_port
| tengigabitethernet
te_port
| fortygigabitethernet
fo_port
| port-channel
group
}
console(config-if)#
Table 5.69. Ethernet interface and interface group configuration mode commands
Command
Value/Default value
Action
loopback-detection enable
-/disabled
Enable loopback detection mechanism on a port.
no loopback-detection
enable
Restore the default value.
EXEC mode commands
Command line prompt in the EXEC mode is as follows:
console#
Table 5.70. EXEC mode commands
Command
Value/Default value
Action
show loopback-detection
[gigabitethernet
gi_port
|
tengigabitethernet
te_port
|
fortygigabitethernet
fo_port
|
port-channel
group
|
detailed]
gi_port: (1..8/0/1..48);
te_port: (1..8/0/1..24);
fo_port: (1..8/0/1..4);
group: (1..16).
Show the state of the loopback detection mechanism.
5.16.5
STP family (STP, RSTP, MSTP)
The main task of STP (Spanning Tree Protocol) is to convert an Ethernet network with multiple links
into a spanning tree loop-free topology. Switches exchange configuration messages using frames in a
specific format and selectively enable or disable traffic transmission to ports.
Rapid STP (RSTP) is the enhanced version of STP that enables faster convergence of a network to a
spanning tree topology and provides higher stability.
Multiple STP (MSTP) is the most recent implementation of STP that supports VLAN. MSTP
configures required number of spanning trees independent on the number of VLAN groups on the switch.
Each instance may contain multiple VLAN groups. However, one drawback of MSTP it that all MSTP
switches should have the same VLAN group configuration.
Max available number of the MSTP instances is specified in the Table 2.9. Main
specifications.