Routing table for DSwT nodes
These Routing Tables have been completed with a specific application in mind: namely
the management of IP based fringe equipment. In this example, only routes between I1
and I2, I3, I4, I5 are necessary: I3 does not need to communicate with I2 for example.
This has been done to minimize the routes in the routing table and give a realistic
indication of what the operator must provision to get the application to work.
The routing tables for DSwT nodes D1, D2, D3, and D4, see the previous figure:
DSwT
Nodes
Final Destination Next Hop
Port Node
D1 120.1.1.0 / 24
120.2.0.0 / 16
120.1.2.0 / 24
120.1.3.0 / 24
120.1.4.0 / 24
120.3.4.0 / 24
LAN
LAN
CLNP-Tunnel
CLNP-Tunnel
CLNP-Tunnel
CLNP-Tunnel
<Local Subnet>
120.1.1.1
NSAP (D2)
NSAP (D3)
NSAP (D4)
NSAP (D4)
D2 120.1.2.0 / 24
120.2.0.0 / 16
LAN
CLNP-Tunnel
<Local Subnet>
NSAP (D1)
D3 120.1.3.0 / 24
120.2.0.0 / 16
LAN
CLNP-Tunnel
<Local Subnet>
NSAP (D1)
D4 120.1.4.0 / 24
120.3.4.0 / 24
120.2.0.0 / 16
LAN
LAN
CLNP-Tunnel
<Local Subnet>
120.1.4.1
NSAP (D1)
In the Routing Tables for DSwT nodes, the Subnet CLNP-Tunnel is seen for next hops
across the OSI (CLNP) DCN. Whenever the subnet is a CLNP-Tunnel, the Next Hop
Node is identified by the NSAP address of that node. As can be seen, nodes D2, D3,
D4 have routes (tunnels) back to D1 only and D1 has routes to D2, D3, D4.
Notice nodes D1 and D4 have an extra route. This is because another router is
involved; the extra route points to the subnet at the far side of the router. This route
must be added since, unlike the Local Route, there is no way to add this route
automatically (without a full blown Dynamic Routing Protocol).
Management communication setup
Example of dual stack with tunneling
....................................................................................................................................................................................................................................
365-312-807R7.2
Issue 4, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
4-25
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