Cisco Catalyst 3560-X User Manual

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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-25303-03
Chapter 1 Configuring STP
Configuring Spanning-Tree Features
• If a neighboring switch external to the switch stack fails or is powered down, normal spanning-tree
processing occurs. Spanning-tree reconvergence might occur as a result of losing a switch in the
active topology.
• If a new switch external to the switch stack is added to the network, normal spanning-tree processing
occurs. Spanning-tree reconvergence might occur as a result of adding a switch in the network.
For more information about switch stacks, see Chapter 1, “Managing Switch Stacks.”
Configuring Spanning-Tree Features
These sections contain this configuration information:
• Default Spanning-Tree Configuration, page 1-13
• Spanning-Tree Configuration Guidelines, page 1-14
• Changing the Spanning-Tree Mode., page 1-15 (required)
• Disabling Spanning Tree, page 1-16 (optional)
• Configuring the Root Switch, page 1-17 (optional)
• Configuring a Secondary Root Switch, page 1-18 (optional)
• Configuring Port Priority, page 1-19 (optional)
• Configuring Path Cost, page 1-21 (optional)
• Configuring the Switch Priority of a VLAN, page 1-22 (optional)
• Configuring Spanning-Tree Timers, page 1-23 (optional)
Default Spanning-Tree Configuration
Table 1-3 shows the default spanning-tree configuration.
Table 1-3 Default Spanning-Tree Configuration
Feature Default Setting
Enable state Enabled on VLAN 1.
For more information, see the “Supported
Spanning-Tree Instances” section on
page 1-10.
Spanning-tree mode PVST+. (Rapid PVST+ and MSTP are
disabled.)
Switch priority 32768.
Spanning-tree port priority (configurable on a per-interface basis) 128.
Spanning-tree port cost (configurable on a per-interface basis) 1000 Mb/s: 4.
100 Mb/s: 19.
10 Mb/s: 100.
Spanning-tree VLAN port priority (configurable on a per-VLAN basis) 128.

Cisco Catalyst 3560-X Specifications

General

Enclosure Type	Rack-mountable - 1U
Subtype	Gigabit Ethernet
Ports	48 x 10/100/1000 + 4 x SFP
Flash Memory	64 MB
Power Device	Internal power supply
Voltage Required	AC 120/230 V (50/60 Hz)
Operating System	Cisco IOS
Device Type	Switch
Performance	Switching capacity: 128 Gbps
Jumbo Frame Support	Yes
Routing Protocol	RIP-1, RIP-2, EIGRP
Remote Management Protocol	SNMP 1, RMON 1, RMON 2, RMON 3, RMON 9, Telnet, SNMP 3, HTTP, HTTPS
Features	DHCP support, VLAN support, QoS, IPv6 support, Syslog
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.3z, IEEE 802.1D, IEEE 802.1Q, IEEE 802.3ab, IEEE 802.1p, IEEE 802.3af, IEEE 802.3x, IEEE 802.3ad, IEEE 802.1w, IEEE 802.1x, IEEE 802.1s, IEEE 802.3ah, IEEE 802.1ag, IEEE 802.3at
Stacking	Stackable
Security Features	SSH, RADIUS, TACACS+
Management	CLI
Dimensions (H x W x D)	17.5 in
Operating Temperature	32 to 113 °F (0 to 45 °C)
Humidity	10 - 95% (non-condensing)