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Cisco MSTP
Interoperability
Force Protocol Version
Guard
18. Refer to the
Spanning Tree Port Cost
Define an Instance Index using the spinner control and then set the cost. The default path cost depends on the user defined
port speed. The cost helps determine the role of the port channel in the MSTP network. The designated cost is the cost for
a packet to travel from this port to the root in the MSTP configuration. The slower the media, the higher the cost.
Speed
<=100000 bits/sec
<=1000000 bits/sec
<=10000000 bits/sec
<=100000000 bits/sec
<=1000000000 bits/sec
<=10000000000 bits/sec
<=100000000000 bits/sec
<=1000000000000 bits/sec
>1000000000000 bits/sec
19. Select
+ Add Row
as needed to include additional indexes.
20. Refer to the
Spanning Tree Port Priority
Define an
Instance Index
of the port becoming a designated port.
21. Select
+ Add Row
needed to include additional indexes.
22. Select
OK
to save the changes made to the Ethernet Port Spanning Tree configuration. Select
saved configuration.
Select either the Point-to-Point or Shared radio button. Selecting Point-to-Point
indicates the port should be treated as connected to a point-to-point link. Selecting
Shared means this port should be treated as having a shared connection. A port
connected to a hub is on a shared link, while one connected to a access point is a point-
to-point link. Point-to-Point is the default setting.
Select either the Enable or Disable radio buttons. This enables interoperability with
Cisco's version of MSTP, which is incompatible with standard MSTP. This setting is
disabled by default.
Sets the protocol version to either STP(0), Not Supported(1), RSTP(2) or MSTP(3). MSTP
is the default setting.
Determines whether the port channel enforces root bridge placement. Setting the
guard to Root ensures the port is a designated port. Typically, each guard root port is a
designated port, unless two or more ports (within the root bridge) are connected
together. If the bridge receives superior Bridge Protocol Data Units (BPDUs) on a guard
root-enabled port, the guard root moves the port to a root-inconsistent STP state. This
state is equivalent to a listening state. No data is forwarded across the port. Thus, the
guard root enforces the root bridge position.
table.
Default Path Cost
200000000
20000000
2000000
200000
20000
2000
200
20
2
table.
using the spinner control and then set the Priority. The lower the priority, a greater likelihood
5 - 29
Reset
to revert to the last
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