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STP, RSTP, and MSTP configuration and management
Specifying the maximum number of hops
for a BPDU (MSTP)
In MSTP mode, use this command to configure the maximum number of hops for a BPDU in an
MSTP region. Specifying the maximum hops for a BPDU prevents the messages from looping
indefinitely on the interface. When you change the number of hops, it affects all spanning tree
instances. The range is 1 through 40. The default is 20 hops.
To configure the maximum number of hops for a BPDU in an MSTP region, perform the following
steps from Privileged EXEC mode.
1. Enter the configure terminal command to access global configuration mode.
2. Enter the protocol command to enable MSTP.
3. Enter the max-hops command to configure the maximum number of hops for a BPDU in an
Specifying a name for an MSTP region
In MSTP mode, use this command to assign a name to an MSTP region. The region name has a
maximum length of 32 characters and is case-sensitive.
To assign a name to an MSTP region, perform the following steps from Privileged EXEC mode.
1. Enter the configure terminal command to access global configuration mode.
2. Enter the protocol command to enable MSTP.
3. Enter the region command to assign a name to an MSTP region.
Specifying a revision number for an MSTP configuration
In MSTP mode, use this command to specify a revision number for an MSTP configuration. The
range is 0 through 255. The default is 0.
To specify a revision number for an MSTP configuration, perform the following steps from Privileged
EXEC mode.
1. Enter the configure terminal command to access global configuration mode.
2. Enter the protocol command to enable MSTP.
3. Enter the revision command to specify a revision number for an MSTP configuration.
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switch(config)#protocol spanning-tree mstp
MSTP region.
switch(conf-mstp)#max-hops hop_count
switch(config)#protocol spanning-tree mstp
switch(conf-mstp)#region sydney
switch(config)#protocol spanning-tree mstp
switch(conf-mstp)#revision 17
Dell Converged Enhanced Ethernet Administrator's Guide
53-1002116-01
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