Understanding Pvst+ And Mistp Modes; Disabled State - Cisco WS-X6066-SLB-APC - Content Switching Module Software Manual

Chapter 8 Configuring Spanning Tree

Disabled State

A port in the disabled state does not participate in frame forwarding or STP, as shown in
port in the disabled state is virtually nonoperational.
Figure 8-7
A disabled port performs as follows:
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Understanding PVST+ and MISTP Modes

Catalyst 6000 family switches provide two proprietary spanning tree modes based on the IEEE 802.1D
standard and one mode that is a combination of the two modes:
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78-13315-02
Port 2 in Disabled State
All segment
frames
Port 1
Station
addresses
BPDUs
Filtering System
database module
Data
frames
Port 2
Disabled
Discards frames received from the attached segment.
Discards frames switched from another port for forwarding.
Does not incorporate station location into its address database. (There is no learning, so there is no
address database update.)
Receives BPDUs but does not direct them to the system module.
Does not receive BPDUs for transmission from the system module.
Receives and responds to network management messages.
Per VLAN Spanning Tree (PVST+)
Multi-Instance Spanning Tree Protocol (MISTP)
MISTP-PVST+ (combination mode)
Forwarding
Network
management
and data frames
Frame
forwarding
Network
management
frames
All segment
frames
Catalyst 6000 Family Software Configuration Guide—Releases 6.3 and 6.4

Understanding PVST+ and MISTP Modes

Figure 8-7. A
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