Configurable Elements Of Vrrp; Virtual Router Identification; Vrrp Versions - Cisco SF500-24 Administration Manual

IP Configuration: IPv4 VRRP Virtual Routers

Configurable Elements of VRRP

Configurable Elements of VRRP
Cisco 500 Series Stackable Managed Switch Administration Guide Release 1.3
A virtual router must be assigned an unique virtual router identifier (VRID) among
all the virtual routers on the same LAN. All VRRP routers supporting the same
virtual router must be configured with all the information relating to the virtual
router including its VRID. Virtual routers should be enabled on the device only
when IP routing is also enabled on the device.
You can configure a VRRP router to participate in one or more virtual routers either
by using CLI commands, or through the web GUI, as described in the
VRRP section.
To configure a virtual router, you configure its information, such as the virtual router
ID and its IP addresses, on every VRRP routers that support the virtual router. The
following elements can be configured and customized.

Virtual Router Identification

It must be assigned an identifier (VRID) and may be assigned a description. The
sections below describe the various attributes of the virtual router.
VRRP supports up to 255 virtual routers (VRRP groups).

VRRP Versions

The device supports the following VRRP version types:
• IPv4 VRRPv3 based on RFC5798. VRRPv3 messages are sent.
• IPv4 VRRPv3 and VRRPv2 based on RFC5798. VRRPv3 and VRRP v2
messages are sent.
• IPv4 VRRPv2 based on RC3768. VRRPv2 messages are sent.
Configuring the VRRP version is per virtual router. The default is VRRPv2.
The following cases might occur when configuring a virtual router:
• All the existing VRRP routers of the virtual router operate in VRRPv3. In this
case, configure your new VRRP router to operate in VRRPv3.
• All the existing VRRP routers of the virtual router operate in VRRPv2. In this
case, configure your new VRRP router to operate in VRRPv2.
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