Stp Max-Hops; Stp Mcheck - HP 6125XLG Command Reference Manual

stp max-hops

Use stp max-hops to set the maximum number of hops for the MST region.
Use undo stp max-hops to restore the default.
Syntax
stp max-hops hops
undo stp max-hops
Default
The maximum number of hops for an MST region is 20.
Views
System view
Predefined user roles
network-admin
Parameters
hops: Sets the maximum hops in the range of 1 to 40.
Examples
# Set the maximum hops of the MST region to 35.
<Sysname> system-view
[Sysname] stp max-hops 35
Related commands
display stp

stp mcheck

Use stp mcheck to perform the mCheck operation on a port.
Syntax
stp mcheck
Views
Ethernet interface view, aggregate interface view
Predefined user roles
network-admin
Usage guidelines
If a port on a device that is running MSTP or RSTP connects to an STP device, the port automatically
transits to the STP mode when the port receives STP BPDUs. If the peer STP device is shut down or
removed and the local device cannot detect the change, the local device cannot automatically transit
back to the original mode. In this case, you can perform an mCheck operation to forcibly transit the port
to operation in the original mode.
Suppose a scenario where Device A, Device B, and Device C are connected in sequence. Device A runs
STP, Device B does not run any spanning tree protocol, and Device C runs RSTP or MSTP. In this case,
when Device C receives an STP BPDU transparently transmitted by Device B, the receiving port transits to
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