Tunneling of TCP/IP over DCN
...................................................................................................................................................................................................................................
IP tunneling
The 1643 Access Multiplexer AM / 1643 Access Multiplexer Small AMS are capable
of tunneling IP traffic through the OSI DCN network. The tunnel provides a virtual
interconnection for IP traffic between the “Ethernet interfaces (LAN)” and/or “end
points of other IP-tunnels (terminating in the NE)” of two NE’s that support this
feature.
Refer to the following figure for an example of IP tunneling:
Note that a tunnel may forward IP traffic to many destinations, that can either be
connected to the Q-LAN of the far end tunneling NE, or must be reached through
subsequent routing towards/through other IP-tunnels and/or towards/through external IP
routers.
The LAN interface supports both IP and OSI traffic simultaneously. Tunneling is
achieved by encapsulating the IP packets in CLNP (OSI) packets.
This feature has no effect on the OSI management of the 1643 Access Multiplexer AM
/ 1643 Access Multiplexer Small AMS itself, apart from the performance impact of
additional IP traffic. This feature requires the NE to act as an IP router itself. The IP
router supports ports to the Ethernet Interface (Q-LAN) and to the CLNP (OSI)
network (i.e. a number of tunnels).
IP tunneling and purposes
This feature is intended to forward IP traffic between IP managed equipment at the
borders of the SDH network and their IP-based management system.
LAN
NE
NE
NE
OSI network
NE
IP host
IP host
Other IP
managed
equipment
IP host
LAN
IP tunnels
ITM/SC
LAN (IP + OSI)
IP
router
LAN
(IP + OSI)
IP
EMS
IP network
Features
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2-26
Alcatel-Lucent - Proprietary
See notice on first page
365-312-801R7.2
Issue 3, May 2007
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