Hivrrp - Hirschmann Power MICE User Manual

Routing configuration industrial ethernet (gigabit) switch

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VRRP/HiVRRP

5.2 HiVRRP

HiVRRP provides a number of mechanisms for shortening the switching

times or reducing the number of Multicasts:

shorter advertisement intervals

link-down notification

preempt delay

Unicast advertisement

domains

In compliance with RFC 2338, the master sends IP Multicast messages

(advertisements) at intervals of one second to the other VRRP routers. Only

if this message does not appear three times do the remaining routers select

a new master.

VRRP has typical switching times of 3 to 4 seconds.

Router A

Router B

Backup Router

Master Router

Router C

Figure 15: Master router <-> backup router switching times according to RFC 2338

VRRP priority router A = 64

VRRP priority router B = 128

VRRP priority router C = 254

3 * Advertisement

Interval

Skew-Time

5.2 HiVRRP

Backup Router

Master Router

t [s]

Routing L3E

Release 4.2 08/08

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Mach 4000