Just a note about GTP-U. The implementation uses GTP-U headers to create a
tunnel, it is in no way compatible with "real" 3GPP GTP nodes.
If you just need a tunnel, don't use GTP. There are plenty of other tunnel
protocols (e.g. GRE, VXLAN) that are more widely used.
If you want to play with GTP,
Instead of assigning the tunnel endpoint address to an interface, it is also
possible to reserve an IP address to a particular tunnel function, by setting
the next-index in the corresponding FIB entry/adjacency.
We typically do this for the mesh type tunnel solutions, were on some of the we
don'
Hi Jakub,
A quick refresher on IP Addressing ☺
In the world or tunnels we typically talk about the underlay and the overlay.
The underlay will contain the addresses that form the tunnel’s source and
destination address (the addresses one sees in the outer IP header) – i.e. the
address in ‘crea
