When using dynamic NAT to a single outside address what is the correct configuration. Using the configuration below does not allow me to ping any address on the the IP NAT Outside interface. Any suggestions?
description WAN port
ip address 18.104.22.168 255.255.255.128
ip nat outside
no ip route-cache
description LAN port
ip address 10.20.10.1 255.255.255.0
ip nat inside
no ip route-cache
ip nat log translations syslog
ip nat pool ovrld 22.214.171.124 126.96.36.199 prefix-length 25
the configuration is ok. Can you check if you have a default route pointing to your Ethernet0/0, such as this:
ip route 0.0.0.0 0.0.0.0 Ethernet0/0
If this is the case, keep in mind that when you define an Ethernet interface as next hop, the router sends an Address Resolution Protocol (ARP) request for your destination address, which the router realizes is not on this interface. The ARP entry for this address is "Incomplete," as seen by the show arp command. An encapsulation failure then occurs as the router is unable to put the packet on the wire with no ARP entry.
In order to have external connectivity, you need the next hop IP address:
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