You're missing a few keys. The index for NAT (or any connection tracking) is the src IP and port plus the dst IP and port. (Some systems even pay attention to TCP sequence numbers.) So a node can open up to 65535 connections to the same dst IP/port -- 192.168.1.1:[1-65535] to (www):80. Change either destination IP or port and it's a different set.
I have faced the same issue. In my case one of the interfaces was down. I have activated it and it solved the issue.
Initially, check your routing table
If you are enable mode, use
show ip interface brief
If you are in configuration mode, use
do show ip int bri ( here do is added )
Check the topology of your network and set the ip address ...
They're asking you to create 3 different subnets. You're overlapping because rather than carrying on from the 2nd subnet your first operation produced, you're just slicing the same initial net in smaller chunks, so of course they overlap, it's still the same network.
Your first operation produced 4 networks, 2nd one being 192.168.1.64,
Ideally, you'd want to ...
What does a router do with a packet if it can't find the destination IP address in its routing table?
If a router has no route to the destination IP, it drops the packet and returns an ICMP Destination unreachable message to the source IP.
If a router receives an ARP request in which the destination hardware address is a broadcast address, and if the ...
ARP is a layer-2 thing -- it's how layer-2 address (MAC) is associated with a layer-3 address (IPv4). The router (any node) will only respond to ARP requests for addresses it owns -- the addresses assigned to it's interface(s) or aliases. It will silently ignore all others.
If your router is setup to handle the ancient bad idea of proxy-arp, then yes, it ...
Just configure the router interfaces towards the PCs with the default gateway IPs: 172.16.1.1/16 and 172.19.1.1/16. You can't use an IP address with all host-part bits zero like 172.16.0.0/16.
You haven't described how the routers are connected. In case it's via Ethernet, they'll require IP addresses on the interfaces between them, e.g. use 172.31.255.0/31 ...