Cisco SG500-52P Administration Guide

Administration: Stack Management
Stack Changes
67 Cisco 500 Series Stackable Managed Switch Administration Guide Release 1.3
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• One or more duplicate unit IDs exist. Auto numbering resolves conflicts and
assigns unit IDs. In case of manual numbering, only one unit retains its unit ID
and the other(s) are shutdown.
• The number of units in the stack exceeds the maximum number of units
allowed. The new units that joined the stack are shut down, and a SYSLOG
message is generated and appears on the master unit.
The following shows an example of auto numbering when a master-enabled unit
joins the stack. There are two units with unit ID = 1. The master selection process
selects the best unit to be the master unit. The best unit is the unit with the higher
uptime in segments of 10 minutes. The other unit is made the backup.
Auto-numbered Master-enabled Unit
The following shows an example of auto numbering when a new unit joins the
stack. The existing units retain their ID. The new unit receives the lowest available
ID.
Auto Number Unit

Cisco SG500-52P Specifications

General

Model	SG500-52P
Ports	52
PoE Ports	48
PoE+	Yes
Switching Capacity	104 Gbps
Layer	Layer 3
Power over Ethernet (PoE)	Yes
Rack Mountable	Yes
VLAN Support	Yes
Manageable	Yes
Jumbo Frame Support	Yes
Power Supply	Internal
Dimensions	440 x 44 x 350 mm
MAC Address Table Size	16K entries
Operating Temperature	0°C to 50°C
Storage Temperature	-20 to 70°C (-4 to 158°F)
Relative Humidity	10% to 90%, non-condensing