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joegoldman
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Joined: Mon May 27, 2013 2:05 am

Down Interface responds to ping?

Thu Mar 18, 2021 7:39 am

Hi Team,

I applied an IP address (in a /30) to a downed interface on an RB1100x4 (running long-term 6.47.9) - the route was listed as DC (not active), the whole /24 that this IP happens to be in is routed to this router, but before the cable was plugged in the IP started responding to ping - i.e. the router turned it into an 'active' IP on the device, should this happen? By my understanding, the IP address should not necessarily be active until the interface is in an up state. Disabling the interface completely stops the behavior.

Thanks,
Joe

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