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ip verify unicast source reachable - what does it do?

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molecul3

molecul3

Technical User
Apr 17, 2003
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Hi all,

Can anyone briefly describe to me what this line does and does not do? what sort of connections would it affect or drop? Basically i would like to know if it affects any sort of traffic e.g. smtp or ftp. excuse my ignorance but any information would be greatly appreciated.
 
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It means that traffic coming into the interface is verified against routing table. If the routing table shows a different source interface than the traffic is arriving on it drops it.. This is a anti - DoS mechanism. However... If you multiple network paths you have a good chance of asymetric routing and this will cause you many headaches.


BuckWeet
 
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