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9.7 TCP/IP and OSI Networking
Figure 9-19
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
10.10.10.100/24
10.10.10.250/24
Non-ONS node
130.94.122.199/28
9.7 TCP/IP and OSI Networking
ONS 15600 DCN communication is based on the TCP/IP protocol suite. However, ONS 15600s 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.
NEs are networked with OSI-based NEs.
Cisco ONS 15600 Reference Manual, R7.0
9-26
shows a remote node connected to an ENE Ethernet port. Proxy and firewall tunnels are
Foreign Node Connection to an ENE Ethernet Port
Remote CTC
10.10.20.10
Interface 0/0
10.10.20.1
Interface 0/1
10.10.10.1
ONS 15600
GNE
ONS 15600
ENE
Foreign NE
Table 9-8
shows the protocols and mediation processes that are involved when TCP/IP-based
10.10.20.0/24
Router A
10.10.10.0/24
ONS 15600
E NE
10.10.10.150/24
ONS 15600
ENE
10.10.10.200/24
Local/Craft CTC
192.168.20.20
Chapter 9
Management Network Connectivity
Ethernet
SONET
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