Brocade Mobility RFS7000-GR Controller System Reference Guide (Supporting software release 4.1.0.0-040GR and later) - Manual (Page 235)

Brocade Mobility RFS7000-GR Controller System Reference Guide 221
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Multiple spanning tree
4
4. Refer to the General Configuration field for the following
Supported Versions Displays the different versions of STP supported.
Protocol Version Displays the current protocol version in use. Available MSTP protocol versions are:
•
forceNonStp
•
forceLegacyDot1d
•
forceDot1w
•
autoDot1s
•
unknown
MST Config. Name Enter a name for the MST region. This is used when configuring multiple regions
within the network. Each switch running MSTP is configured with a unique MST
region name. This helps when keeping track of MSTP configuration changes.
Increment this number with each configuration change. The revision-level specifies
the revision-level of the current configuration.
MST Revision Level Assign a MST revision level number to the MSTP region to which the device
belongs. Each switch running is configured with a unique MSTP name and revision
number. This helps when keeping track of MSTP configuration changes. Increment
this number with each configuration change. The revision level specifies the
revision level of the current configuration.
Error Disable Timeout Select this option to enable an error disable-timeout facility. The error
disable-timeout is used to set a timeout value for ports disabled resulting from a
BPDU guard.
The BPDU guard feature shuts down the port on receiving a BPDU on a
BPDU-guard enabled port.
ID Format Selector Displays the ID format currently in use.
Portfast Bdpu Filter Select this checkbox to enable BPDU filter for all portfast enabled ports.The
Spanning Tree Protocol sends BPDUs from all the ports. Enabling the BPDU filter
feature ensures PortFast enabled ports do not transmit or receive any BPDUs.
PortFast Bdpu Guard Select this checkbox to enable BPDU guard for all portfast enabled ports.
When the BPDU Guard feature is set for bridge, all portfast-enabled ports of the
bridge that have BPDU set to default shutdown the port on receiving a BPDU.
Hence no BPDUs are processed.
Admin Cisco Mode Select this checkbox to enable interoperability with Cisco’s version of MSTP, which
is incompatible with standard MSTP.
Operator Cisco Mode Displays whether Cisco’s version of MSTP is running. This is not a configurable
parameter.
MST Config Digest Displays the Configuration Digest derived from the MSTP Configuration table.
CIST Root This displays the CIST (Common and Internal Spanning Tree) root bridge’s bridge
identifier. The bridge identifier consists of a priority value followed by the MAC
address.The lower the path cost, the greater the likelihood of the bridge becoming
the root.
External Root Cost Displays the root cost of the CIST root.
Regional Root This displays the regional roots MAC address.
CIST Bridge Priority Set the bridge priority for the common instance. The value entered, determines the
likelihood this bridge is selected as the root.
The lower the priority the greater the likelihood of the bridge becoming a root.