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EES4710BD 10 Slots L2/L3/L4 Chassis Switch
Bridge_Max_Age >= 2 ×(Bridge_Hello_Time + 1.0 seconds)
Example: Setting the maximum age time to 25 seconds in Global Mode.
Switch(Config)#spanning-tree maxage 25
10.2.2.11 spanning-tree max-hop
Command: spanning-tree max-hop <hop-count>
no spanning-tree max-hop
Function: Sets the maximum hops allowed for connecting to the port; the "no spanning-tree
max-hop" command restores the default settings.
Parameters: < hop-count> is the max hop count, the valid range is 1 to 40.
Command mode: Global Mode
Default: The default maximum is 20 hops.
Usage Guide: MSTP not only keeps Max-age for BPDU lifecycle, but a Max-hop added to the
MSTP field standing for BPDU lifecycle. The max-hop count decreases when packets transmit
through the network. A BPDU message reaches its max Max-hop upon leaving the root bridge of
MSTI, each time BPDU is received, the Max-hop value decrements by 1. When a port receives a
BPDU with Max-hop 0, it will drop that BPDU and make itself the designated port for sending
BDPUs.
Example: Setting the max-hop count to 32.
Switch(Config)#spanning-tree max-hop 32
10.2.2.12 spanning-tree mcheck
Command: spanning-tree mcheck
Function: Forces port migration to run under MSTP.
Command mode: Port configuration Mode
Default: Ports are operating under MSTP by default.
Usage Guide: If bridges running IEEE 802.1D STP exist in the segment connected to the current
Ethernet port, this port will migrate to the STP compatible mode. When the network is fairly stable,
even if the bridge running STP is disconnected, the associated port running MSTP will continue
running in STP compatible mode, and this command can be used to force the port to migrate to
MSTP mode. When the port migrates to MSTP, it will switch back to STP compatible mode on
receiving news STP packets,
This command can only be executed when the switch is running in IEEE 802.1s MSTP mode, and
will be invalid if the switch is configured in IEEE 802.1D STP mode.
Example: Forcing port 1/2 migrate MSTP mode.
Switch(Config-Ethernet1/2)#spanning-tree mcheck
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