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null0

I am looking at the config of my L3 switches and I see that they have the static route to null0:
ip route 169.254.0.0 255.255.0.0 Null0
ip route 172.16.0.0 255.255.0.0 Null0
ip route 192.168.0.0 255.255.0.0 Null0

What are they for? Can I delete them? Thanks

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bbao

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Predrag Jovic

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leblanc

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So I have those null0 routes in addition to a couple of static routes on all of my main switches and they are communicating via EIGRP. Should I filter those null0 routes out of my redistribution.

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Predrag Jovic

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Predrag Jovic

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leblanc

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In your example with 192.168.0.0./22. Let say I have site A with 192.168.0.0, .1.0, .2.0 and site B 192.168.100.0, 101.0. Site B also have static route for 192.168.100.0, 101.0. When it gets to site A, the traffic will be dropped. Correct? If yes, then 192.168.0.0 can only be on site A and not anywhere else. Correct?

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Predrag Jovic

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