Q8Network
An engineer needs to configure Strict Unicast Reverse Path Forwarding (uRPF) mode for IPv4 packets on the Ethernet1/1 interface of a Cisco Nexus 9500 Series Switch. Which configuration accomplishes this?
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Discussion · 5
A 2
Selected Answer: A
To configure Strict Unicast Reverse Path Forwarding (uRPF) mode for IPv4 packets on the Ethernet1/1 interface on a Cisco Nexus 9500 Series Switch, you would use the reachable-via rx option. This makes sure the source address of the incoming packet is reachable through the same interface it arrived on, which is the definition of strict mode for uRPF.
will go with A
A 1
Selected Answer: A
rx is the one! A!
1
{ip | ipv6} verify unicast source reachable-via {any [allow-default] | rx}
Example:
switch(config-if)# ip verify unicast source reachable-via any
The ANSWER is <<< A >>>
C 1
Selected Answer: C
I'm going with C with the 'via any' vs. 'via rx'
I'm not sure about the difference and what in the question shows it should be any vs rx...however the configuration guide, every example SPECIFICALLY for the 9500 uses the 'any' syntax
The following example shows how to configure loose unicast RPF for IPv4 packets on a Cisco Nexus 9500 Series switch with an -R line card:
interface Ethernet2/3
ip address 172.23.231.240/23
ip verify unicast source reachable-via any
The following example shows how to configure strict unicast RPF for IPv4 packets on a Cisco Nexus 9300 platform switch:
no system urpf disable
interface Ethernet2/2
ip address 172.23.231.240/23
ip verify unicast source reachable-via rx
1
i know the difference between 'any' and 'rx' direction-wise, just not the context for the question. no mention of direction is needed.