Vrrp; Basic - NETGEAR GSM7252PS - ProSafe 52 Ports Gigabit Ethernet L2 Managed Stackable Switch User Manual

ProSafe® Gigabit L3 Managed Stackable Switches Software Administration Manual
1. Use Interface to select the router interface for which data is to be configured.
2. Use Advertise Mode to select enable or disable. If you select enable, Router
Advertisements will be transmitted from the selected interface.
3. Use Advertise Address to enter the IP Address to be used to advertise the router.
4. Use Maximum Advertise Interval to enter the maximum time (in seconds) allowed
between router advertisements sent from the interface.
5. Use Minimum Advertise Interval to enter the minimum time (in seconds) allowed between
router advertisements sent from the interface.
6. Use Advertise Lifetime to enter the value (in seconds) to be used as the lifetime field in
router advertisements sent from the interface. This is the maximum length of time that the
advertised addresses are to be considered as valid router addresses by hosts.
7. Use Preference Level to specify the preference level of the router as a default router
relative to other routers on the same subnet. Higher numbered addresses are preferred.
You must enter an integer.

VRRP

The Virtual Router Redundancy protocol is designed to handle default router failures by
providing a scheme to dynamically elect a backup router. The driving force was to minimize
"black hole" periods due to the failure of the default gateway router during which all traffic
directed towards it is lost until the failure is detected. Though static configuration of default
routes is popular, such an approach is susceptible to a single point of failure when the default
router fails. VRRP advocates the concept of a "virtual router" associated with one or more IP
Addresses that serve as default gateways. In the event that the VRRP Router controlling
these IP Addresses (formally known as the Master) fails, the group of IP Addresses and the
default forwarding role is taken over by a Backup VRRP Router.
From the VRRP link, you can access the following pages:
•

Basic

on page 325
• Advanced on page 329
Basic
From the Basic link, you can access the following pages:
• VRRP Configuration
VRRP Configuration
Use the VRRP Configuration page to enable or disable the administrative status of a virtual
router.
To display the VRRP Configuration page, click Routing
Configuration.
on page 325
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VRRP Basic VRRP
Chapter 4. Routing | 325