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Cisco ONS 15600 SDH Reference Manual, Release 9.0
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Chapter 9 Management Network Connectivity
9.6 TCP/IP and OSI Networking
shows a remote node connected to an ENE Ethernet port. Proxy and firewall tunnels are
useful in this example because the GNE would otherwise block IP access between the PC and foreign
node. This configuration also requires a firewall tunnel on the ENE.
Figure 9-19
Foreign Node Connection to an ENE Ethernet Port
9.6 TCP/IP and OSI Networking
ONS 15600 SDH DCN communication is based on the TCP/IP protocol suite. However,
ONS 15600 SDHs can also be networked with equipment that uses the OSI protocol suite. While TCP/IP
and OSI protocols are not directly compatible, they do have the same objectives and occupy similar
layers of the OSI reference model.
shows the protocols and mediation processes that are
involved when TCP/IP-based NEs are networked with OSI-based NEs.
Remote CTC
10.10.20.10
10.10.20.0/24
10.10.10.0/24
Interface 0/0
10.10.20.1
Router A
Interface 0/1
10.10.10.1
ONS 15600 SDH
GNE
10.10.10.100/24
ONS 15600 SDH
ENE
10.10.10.250/24
ONS 15600 SDH
E NE
10.10.10.150/24
ONS 15600 SDH
ENE
10.10.10.200/24
159578
Local/Craft CTC
192.168.20.20
Ethernet
SDH
Non-ONS node
Foreign NE
130.94.122.199/28