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Virtual IP Address - Any other use besides Load Balancing?

Posted on 2014-09-10
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I read about load balancing using Virtual IP addresses.  Can someone give me a real-life example of another application besides load balancing.
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Question by:brothertruffle880
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mikebernhardt earned 668 total points
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Resiliency. In networks it's very common to use virtual IPs shared between routers or switches for a LAN default gateway. You can also have servers replicate with one active and the other standby.
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by:Jan Springer
Jan Springer earned 668 total points
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Failover (firewalls or VRRP), different services on the same physical machine, the same service for multiple domains (web servers).
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by:Bryant Schaper
Bryant Schaper earned 664 total points
ID: 40315960
We use it both internally and externally at or Datacenter.

For example we internally use 10.0.0.1 for all routing which is an HSRP address on 10.0.0.2 and 10.0.0.3, so if either device fails or needs maintenance we can do so without impacting the network.  Our ISP provides us with three IP addresses for the same function, so we put one each router and they share the other.  Provides more resiliency as mentioned.  VRRP and HSRP are the same, hsrp is the cisco flavor.
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