August 2018
Beginner
462 pages
12h 36m
English
Content preview from Learning OpenStack Networking - Third Edition
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Preemption delay timer
After a backup router receives an advertisement with a priority lower than itself, it waits for a period of time established by the preemption delay timer before sending out VRRP advertisements to start a new master election. This delay helps the routers avoid frequent state changes among members of the VRRP group in cases of network flapping. Because preemption is not enabled within Neutron routers, this timer is not configured.
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