principle
Experimental simulation
Lab topology
Experimental parameters
Test connectivity
Two PCping and found a timeout
Why we can look at the routing table, we found no segment information is 20, so we have to add
When the access address is added to the segment 20, is provided next-hop router interface
We look R2 routing table, it has not found
So we add next-hop routing on R2
Look R3 routing table, found 20 segment, but now ping can not go back up, but ah, the same steps over again, just like pc2pingpc1
carry out! Successfully ping
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