Cisco Catalyst 2950 Command Reference

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Catalyst 2950 and Catalyst 2955 Switch Command Reference
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Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands
errdisable detect cause
errdisable detect cause
Use the errdisable detect global configuration command to enable error disable detection. Use the no
form of this command to disable this feature.
errdisable detect cause {all | dhcp-rate-limit | dtp-flap | gbic-invalid | link-flap | loopback |
pagp-flap | vmps}
no errdisable detect cause {all | dhcp-rate-limit | dtp-flap | gbic-invalid | link-flap | loopback |
pagp-flap | vmps}
Syntax Description
Defaults The default is all, enabled for all causes.
Command Modes Global configuration
Command History
Usage Guidelines A cause (for example, dtp-flap) is the reason why the error-disabled state occurred. When a cause is
detected on an interface, the interface is placed in error-disabled state, an operational state similar to
link-down state. If you do not enable errdisable recovery for the cause, the interface stays in the
error-disabled state until you enter the shutdown and no shutdown interface configuration commands.
If you enable the recovery for a cause, the interface is brought out of the error-disabled state and allowed
to retry the operation again when all the causes have timed out.
You must enter the shutdown and then the no shutdown commands to manually recover an interface
from the error-disabled state.
all Enable detection for all error disable causes.
dhcp-rate-limit Enable detection for the DHCP cause.
dtp-flap Enable detection for the Dynamic Trunking Protocol (DTP)-flap cause.
gbic-invalid Enable error detection for an invalid GBIC error-disable cause.
link-flap Enable detection for the link flap cause.
loopback Enable detection for the loopback cause.
pagp-flap Enable detection for the Port Aggregation Protocol (PAgP)-flap cause.
vmps Enable error detection for the VLAN Membership Policy Server (VMPS).
Release Modification
12.1(6)EA2 This command was introduced.
12.1(9)EA1 The bpduguard, rootguard, and udld keywords were removed. The
gbic-invalid keyword was added.
12.1(19)EA1 The dhcp-rate-limit and loopback keywords were added.
12.1(14)EA1 The loopback keyword was added.

Cisco Catalyst 2950 Specifications

General

Forwarding Bandwidth	8.8 Gbps
Switching Capacity	13.6 Gbps
Forwarding Rate	6.6 Mpps
Weight	3.6 kg
RAM	16 MB
Flash Memory	8 MB
Operating Humidity	10% to 85% non-condensing
Uplink Ports	2 x 10/100/1000Base-T
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Quality of Service (QoS), VLAN support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicators	system
Operating Temperature	0 to 45°C
Ports	24 x 10/100 Ethernet ports
MAC Address Table Size	8, 192 entries
Power Supply	Internal 100-240V AC, 50-60Hz