Disaster recovery for active-standby data center using route health and BGP
First Claim
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1. A data center comprising:
- An active data center coupled to at least two internet service providers;
A standby data center coupled to said active data center and to at least one of said internet service providers;
Means for switching from said active data center to said standby data center in the event of a disaster causing said active data center to be unavailable.
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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.
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Citations
20 Claims
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1. A data center comprising:
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An active data center coupled to at least two internet service providers;
A standby data center coupled to said active data center and to at least one of said internet service providers;
Means for switching from said active data center to said standby data center in the event of a disaster causing said active data center to be unavailable. - View Dependent Claims (2, 3, 4)
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5. In an active/standby data center, a method for making the standby data center available to network traffic in the event the active data center is not available, the method comprising the steps of:
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redistributing IGP routes into BGP at both data centers;
conditionally advertising the prefix of interest from the primary data center into the I-BGP link; and
advertising the prefix of interest with a longer mask to the E-BGP peer of the secondary site router if the prefix of interest is not in the BGP table of the secondary data center router. - View Dependent Claims (6, 7, 8)
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9. A data center comprising:
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An active data center coupled to at least two internet service providers;
A standby data center coupled to said active data center and to at least one of said internet service providers;
Means for injecting routes of interests into IGP using RHI such that the route to said standby data center is selected in the event of a disaster causing said active data center to be unavailable.
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10. The data center of claim 10 wherein said active data center and standby data center are configured as an autonomous system coupled to at least two other autonomous systems and an edge router of said active data center is configured as:
router bgp 3 bgp log-neighbor-changes redistribute ospf 1 route-map OspfRouteFilter neighbor 141.41.248.130 remote-as 3 neighbor 142.41.248.130 remote-as 2 neighbor 151.41.248.129 remote-as 1 no auto-summary ! - View Dependent Claims (11)
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13. An autonomous system comprising:
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an active data center, having a first IP address, a first edge device coupling said active data center to the internet;
a standby data center having a second IP address identical to said first IP address;
a second edge device coupling said standby data center to the internet;
a communication link utilizing interior border gateway protocol to enable said first edge device to send route health updates to said second edge device; and
said second edge device adapted to conditionally route advertisement if said active data center is no longer active. - View Dependent Claims (12, 14, 15, 16, 17, 18, 19, 20)
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Specification