Cisco 500 Series Administration Guide

IP Configuration: VRRP
Overview
419 Cisco 500 Series Stackable Managed Switch Administration Guide
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Router B and C function as a virtual router backups. If the virtual router master
fails, the router configured with the higher priority becomes the virtual router
master and provides service to the LAN hosts with minimal interruption.
NOTE The VRRP router priority depends on the following: If the VRRP router
is the owner, its priority is 255 (the highest), if it is not an owner, the priority is
manually configured (always less than 255).
When Router A recovers, it becomes the virtual router master again. During the
period that the master is recovering, both masters forwards packets and as a
result, there is some duplication (regular behavior) but no interruption.
For more detail on the roles that VRRP routers play and what happens if the virtual
router master fails, see VRRP Router Priority and Preemption.
The following shows a LAN topology in which VRRP is configured. Routers A and B
share the traffic to and from clients 1 through 4 and Routers A and B act as virtual
router backups to each other if either router fails.

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