Avaya Configuring VRRP Services Uživatelský manuál stáhnout pdf (Strana 14)

Configuring VRRP Services

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304138-A Rev 00

Master Virtual Router

The master virtual router is the VRRP router responsible for forwarding the traffic

received at the MAC address associated with the virtual router IP address. A

VRRP router with the highest priority assumes the responsibilities of the master

virtual router. When the master virtual router fails, one of the backup virtual

routers becomes the master virtual router.

Backup Virtual Routers

If the master virtual router becomes unavailable or if it is not functioning

normally, VRRP dynamically switches over to one of the backup virtual routers,

in the order of the priority you set.

If more than one backup virtual router has the same priority assigned to it, the

VRRP router with the greater primary IP address will become the new master

virtual router.

Critical IP Interfaces

You can establish a critical IP address, which is a physical IP interface on a local

router, for each virtual router. If that critical IP interface fails, then VRRP switches

to another virtual router. Figure 1-3 on page 1-5 shows a sample VRRP

configuration using a critical IP interface.

VRRP Messaging

VRRP generates VRRP advertisement messages as IP multicast datagrams,

enabling VRRP to operate over a variety of multiaccess LAN technologies that

support IP multicasting.

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Avaya Configuring VRRP Services Uživatelský manuál Strana 14