Configuring Mstp Features; Default Mstp Configuration - Cisco ME 3400 Software Configuration Manual

Configuring MSTP Features

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Configuring MSTP Features
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Default MSTP Configuration

Table 15-4
Table 15-4 Default MSTP Configuration
Feature
Spanning-tree mode
Switch priority (configurable on a per-CIST port basis)
Spanning-tree port priority (configurable on a per-CIST port basis)
Spanning-tree port cost (configurable on a per-CIST port basis)
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
15-14
Protocol migration-For backward compatibility with IEEE 802.1D switches, RSTP selectively
sends IEEE 802.1D configuration BPDUs and TCN BPDUs on a per-port basis.
When a port is initialized, the migrate-delay timer is started (specifies the minimum time during
which RSTP BPDUs are sent), and RSTP BPDUs are sent. While this timer is active, the switch
processes all BPDUs received on that port and ignores the protocol type.
If the switch receives an IEEE 802.1D BPDU after the port's migration-delay timer has expired, it
assumes that it is connected to an IEEE 802.1D switch and starts using only IEEE 802.1D BPDUs.
However, if the RSTP switch is using IEEE 802.1D BPDUs on a port and receives an RSTP BPDU
after the timer has expired, it restarts the timer and starts using RSTP BPDUs on that port.
Default MSTP Configuration, page 15-14
MSTP Configuration Guidelines, page 15-15
Specifying the MST Region Configuration and Enabling MSTP, page 15-16
Configuring the Root Switch, page 15-17
Configuring a Secondary Root Switch, page 15-18
Configuring Port Priority, page 15-19
Configuring Path Cost, page 15-21
Configuring the Switch Priority, page 15-22
Configuring the Hello Time, page 15-23
Configuring the Forwarding-Delay Time, page 15-23
Configuring the Maximum-Aging Time, page 15-24
Configuring the Maximum-Hop Count, page 15-24
Specifying the Link Type to Ensure Rapid Transitions, page 15-25
Designating the Neighbor Type, page 15-25
Restarting the Protocol Migration Process, page 15-26
shows the default MSTP configuration.
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Default Setting
Rapid PVST+ (PVST+ and MSTP are disabled).
32768.
128.
1000 Mbps: 4.
100 Mbps: 19.
10 Mbps: 100.
Chapter 15 Configuring MSTP
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OL-9639-07