Cisco 500 Series Administration Guide

Port Management: Unidirectional Link Detection
Configuring UDLD
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- Disabled—UDLD has been disabled on this port.
- Shutdown—The port has been shut down because its link with the
connected device is undetermined in aggressive mode.
• Neighbor Expiration Time (Sec.)—Displays the time that must pass before
the device attempts to determine the port UDLD status. This is three times
the Message Time.
• Neighbor Message Time (Sec.)—Displays the time between UDLD
messages.

Cisco 500 Series Specifications

General

Model	Cisco 500 Series
Category	Switch
Mounting	Rack-mountable
Management	Web-based, CLI, SNMP
Ports	24, 48
Port Speed	10/100/1000 Mbps
PoE Support	Available on some models
Switching Capacity	Up to 176 Gbps
MAC Address Table Size	16, 000 entries
Security	ACLs, 802.1X
Quality of Service (QoS)	Yes
Dimensions	Varies by model
Weight	Varies by model
Humidity	10% to 90% non-condensing
Power Supply	Internal
Power Consumption	Varies by model
Jumbo Frame Support	Up to 9216 bytes