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Cisco 897 dialer "ip verify unicast source reachable-via rx allow-default" vs "ip verify unicast reverse-path"

Luca Pecchiari
Beginner
Beginner

Hello to everybody

 

i was trying to compare "ip verify unicast source reachable-via rx allow-default" vs "ip verify unicast reverse-path" to apply it on the dialer interface on a cisco 897 configured with vdsl line connected to an isp

 

which one is the best?

 

My idea is remove the antispoofig acl, and undertand the difference.

 

Thank you

2 Replies 2

paul driver
VIP Expert VIP Expert
VIP Expert

Hello
ip verify unicast source reachable-via rx allow-default"

enables strict rpf when a source ip address of a packet isn’t in the route table of the router and so allows it to use a default route as validation.

ip verify unicast reverse-path 
Is rpf for security devices such as firewalls 


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Kind Regards
Paul

but i can enable both on my router

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