High Availability

HA, failover, VRRP and cluster terms.

• What is high availability (HA); at which layers is it provided in TR7?GEN-02-001
• What is failover; when does it happen in TR7?GEN-02-002
• What is the difference between an active-passive and an active-active cluster?GEN-02-003
• What is VRRP; how does it provide VIP failover in TR7?GEN-02-004
• What is a heartbeat; which links serve this role in a TR7 cluster?GEN-02-005
• What is Gateway Monitoring; how does it affect VIP failover?GEN-02-006