It's the line
Tunnel protocol/transport GRE/IP
So when using this tunnel.
On R4, the
show interfaces tunnel is reporting what it is seeing as data from the other end. The source is from R2 (source) to R4 (destination).
R2 is to show the same thing as well except that the tunnel source is not matching the R4
source which should be 10.10.10.1 instead of 10.10.1.10.
Edutainer Manager, ITProTV
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