Cisco Catalyst 3120 User Manual

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Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
OL-12247-01
Chapter 46 Configuring Fallback Bridging
Configuring Fallback Bridging
To return to the default setting, use the no bridge bridge-group hello-time global configuration
command.
This example shows how to change the hello interval to 5 seconds in bridge group 10:
Switch(config)# bridge 10 hello-time 5
Changing the Forward-Delay Interval
The forward-delay interval is the amount of time spent listening for topology change information after
a port has been activated for switching and before forwarding actually begins.
Beginning in privileged EXEC mode, follow these steps to change the forward-delay interval. This
procedure is optional.
To return to the default setting, use the no bridge bridge-group forward-time global configuration
command.
This example shows how to change the forward-delay interval to 10 seconds in bridge group 10:
Switch(config)# bridge 10 forward-time 10
Changing the Maximum-Idle Interval
If a switch does not receive BPDUs from the root switch within a specified interval, it recomputes the
spanning-tree topology.
Step 4
show running-config Verify your entry.
Step 5
copy running-config startup-config (Optional) Save your entry in the configuration file.
Command Purpose
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
bridge bridge-group forward-time
seconds
Specify the forward-delay interval.
• For bridge-group, specify the bridge group number. The range is 1
to 255.
• For seconds, enter a number from 4 to 200. The default is 20.
Step 3
end Return to privileged EXEC mode.
Step 4
show running-config Verify your entry.
Step 5
copy running-config startup-config (Optional) Save your entry in the configuration file.

Cisco Catalyst 3120 Specifications

General

Ports	24 x 10/100 + 2 x SFP
MAC Address Table Size	8K entries
Power Supply	AC 120/230 V (50/60 Hz)
Device Type	Switch
Form Factor	Rack-mountable
Routing Protocol	RIP-1, RIP-2, static IP routing
Remote Management Protocol	SNMP 1, RMON 1, RMON 2, RMON 3, RMON 9, Telnet, SNMP 3, SNMP 2c, HTTP, HTTPS, TFTP, CLI
Features	DHCP support, VLAN support, auto-negotiation, IPv6 support, Access Control List (ACL) support, Quality of Service (QoS), Rapid Spanning Tree Protocol (RSTP) support, Multiple Spanning Tree Protocol (MSTP) support, IGMP snooping
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.3z, IEEE 802.1D, IEEE 802.1Q, IEEE 802.3ab, IEEE 802.1p, IEEE 802.3x, IEEE 802.1w, IEEE 802.1x, IEEE 802.1s
Dimensions (H x W x D)	1.7 in x 17.5 in
Operating Temperature	32 °F
Operating Humidity	10%