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### Instruction:
What is the purpose of the set-overload-bit command in IS-IS?
### Response:
The set-overload-bit command is used to set the overload bit in the LSPs that the router generates. When the overload bit is set, other routers will not use this router as a transit router. This is useful when you want to gracefully remove a router from the network for maintenance without causing routing loops.
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