56 Dell Converged Enhanced Ethernet Administrator’s Guide53-1002116-01STP, RSTP, and MSTP configuration and management6Specifying the maximum number of hopsfor a BPDU (MSTP)In MSTP mode, use this command to configure the maximum number of hops for a BPDU in anMSTP region. Specifying the maximum hops for a BPDU prevents the messages from loopingindefinitely on the interface. When you change the number of hops, it affects all spanning treeinstances. 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 followingsteps from Privileged EXEC mode.1. Enter the configure terminal command to access global configuration mode.2. Enter the protocol command to enable MSTP.switch(config)#protocol spanning-tree mstp3. Enter the max-hops command to configure the maximum number of hops for a BPDU in anMSTP region.switch(conf-mstp)#max-hops hop_countSpecifying a name for an MSTP regionIn MSTP mode, use this command to assign a name to an MSTP region. The region name has amaximum 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.switch(config)#protocol spanning-tree mstp3. Enter the region command to assign a name to an MSTP region.switch(conf-mstp)#region sydneySpecifying a revision number for an MSTP configurationIn MSTP mode, use this command to specify a revision number for an MSTP configuration. Therange is 0 through 255. The default is 0.To specify a revision number for an MSTP configuration, perform the following steps from PrivilegedEXEC mode.1. Enter the configure terminal command to access global configuration mode.2. Enter the protocol command to enable MSTP.switch(config)#protocol spanning-tree mstp3. Enter the revision command to specify a revision number for an MSTP configuration.switch(conf-mstp)#revision 17
