Disaster recovery for active-standby data center using route health and BGP
First Claim
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1. A data center system comprising:
- an first data center coupled to at least two internet service providers via a first network device; and
a second data center coupled to the first data center and to at least one of the internet service providers via a second network device, the first network device being configured to broadcast a prefix to the second network device without export, thereby preventing the second network device from broadcasting the prefix to an exterior gateway peer, the second network device being configured to advertise a more specific prefix to the at least one of the internet service providers, if the broadcast of the prefix from the first network device is not received to update content in a gateway table of the second network device.
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Abstract
The present invention provides an active/standby data center that avoids the delay associated with a cached DNS entry to switch from the active data center to the standby data center. When the active data center becomes unavailable, the standby data center advertises the same address as the primary data center so the change over occurs quickly. When the IP address of the primary data center is no longer visible to the standby data center, the standby data center begins to advertise.
58 Citations
28 Claims
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1. A data center system comprising:
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an first data center coupled to at least two internet service providers via a first network device; and a second data center coupled to the first data center and to at least one of the internet service providers via a second network device, the first network device being configured to broadcast a prefix to the second network device without export, thereby preventing the second network device from broadcasting the prefix to an exterior gateway peer, the second network device being configured to advertise a more specific prefix to the at least one of the internet service providers, if the broadcast of the prefix from the first network device is not received to update content in a gateway table of the second network device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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broadcasting a prefix from a first network device of a first data center to a second network device of a second data center without export, thereby preventing the second network device from broadcasting the prefix to an exterior gateway peer, the first data center being coupled to at least two internet service providers via the first network device, the second data center being coupled to the first data center and to at least one of the internet service providers via the second network device; and advertising a more specific prefix to the at least one of the internet service providers, if the broadcast of the prefix is not received to update content in a gateway table of the second network device. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A data center system comprising;
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a first data center coupled to at least two internet service providers via a first network device; and a second data center coupled to the first data center and to at least one of the internet service providers via a second network device, the first data center being configured to inject a route into an internal gateway protocol (IGP) network using route health injection (RHI), such that a route to the second data center is selected if the first data center becomes unavailable. - View Dependent Claims (20, 21)
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22. An apparatus comprising:
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means for broadcasting a prefix from a first network device of a first data center to a second network device of a second data center without export, thereby preventing the second network device from broadcasting the prefix to an exterior gateway peer, the first data center being coupled to at least two internet service providers via the first network device, the second data center being coupled to the first data center and to at least one of the internet service providers via the second network device; and means for advertising a more specific prefix to the at least one of the internet service providers, if the broadcast of the prefix is not received to update content in a gateway table of the second network device. - View Dependent Claims (23, 24)
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25. A stand-by network device comprising:
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a first interface to receive a broadcast of a prefix from a primary network device of a primary data center, the broadcast prevention the stand-by network device from broadcasting the prefix to an exterior gateway peer, the primary data center being coupled to at least two internet service providers via the primary network device, the first interface enabling the primary network device to update content in a gateway table of the stand-by network device; and a second interface to advertise a more specific prefix to at least one of the internet service providers, if the broadcast of the prefix is not received at the first interface to update content in the gateway table of the stand-by network device. - View Dependent Claims (26, 27, 28)
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Specification