Orion A10E - Configuring Interface Loopguard; Executing Mcheck Operation

Orion Networks
A10E/A28E/A28F Configuration Guide
7 Reliability
Orion Networks
241
Step
Configuration
Description
2
Alpha-A28E(config)#interface port
port-id
Enter physical layer interface
configuration mode.
3
Alpha-A28E(config-port)#spanning-
tree rootguard { enable |
disable }
Configure root interface protection.
7.5.17 Configuring interface loopguard
The spanning tree has two functions: loopguard and link backup. Loopguard requires carving
up topology network into tree structure. There must be redundant link in topology if requiring
link backup. Spanning tree can avoid loop by blocking the redundant link and enable link
backup function by opening redundant link when the link breaks down.
Spanning tree module exchanges packets periodically, and the link has failed if it has not
received packet in a period. Then select a new link and enable backup interface. In actual
network application, the packet cannot be received not only for link fault, then at this time,
enable backup interface may lead to loop link.
Purpose of loopguard is to keep the original interface status when it cannot receive packet in a
period.
Loopguard and link backup functions are exclusive, loopguard requires disabling link backup
to avoid loop.
Configure interface loop protection for the A10E/A28E as below.
Step
Configuration
Description
1
Alpha-A28E#config
Enter global configuration mode.
2
Alpha-A28E(config)#interface
port port-id
Enter physical layer interface
configuration mode.
3
Alpha-A28E(config-
port)#spanning-tree loopguard
{ enable | disable }
Configure interface loopguard
attributes.
7.5.18 Executing mcheck operation
Interface on MSTP device has two working modes: STP compatible mode and MSTP mode.
Suppose the interface of MSTP device in a switch network is connected to the A10E/A28E
running STP, the interface will change to work in STP compatible mode automatically. But
the interface cannot change to work in MSTP mode if the A10E/A28E running STP is
removed, i.e. the interface still works in STP compatible mode. You can execute the mcheck
command to force the interface working in MSTP mode. If the interface receives new STP
packet again, it will return to STP compatible mode.
Configure the A10E/A28E to execute mcheck operation as below.