Dell Force10 Z9000 - Tc-Flush-Standard

Command History
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 8.2.1.0 Introduced.
Usage
Information
Some non-Dell Force10 systems which have hybrid ports participating in PVST+ transmit two
kinds of BPDUs: an 802.1D BPDU and an untagged PVST+ BPDU.
Dell Force10 systems do not expect PVST+ BPDU on an untagged port. If this happens, FTOS
places the port in the Error-Disable state. This behavior might result in the network not
converging. To prevent FTOS from executing this action, use the no spanning-tree
pvst err-disable command cause invalid-pvst-bpdu.
Related
Commands
show spanning-tree pvst – views the PVST+ configuration.
tc-flush-standard
Enable the MAC address flushing after receiving every topology change notification.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax
tc-flush-standard
To disable, use the no tc-flush-standard command.
Defaults Disabled.
Command Modes CONFIGURATION
Command History
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 7.6.1.0 Introduced on the S-Series.
Version 7.5.1.0 Introduced on the C-Series.
Version 6.5.1.0 Introduced.
Usage
Information
By default, FTOS implements an optimized flush mechanism for PVST+. This helps in flushing
the MAC addresses only when necessary (and less often) allowing for faster convergence
during topology changes. However, if a standards-based flush mechanism is needed, you can
turn this knob command on to enable flushing MAC addresses after receiving every topology
change notification.
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