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Chapter 13 Management Network Connectivity
13.7 13.7.9 OSI/IP Networking Scenarios
All ONS 15454 NEs participating in an OSI network run OSI over PPP between themselves. This is
needed so that other vendor GNEs can route TL1 commands to all ONS 15454 NEs participating in
the OSI network.
13.7.9.1 OSI/IP Scenario 1: IP OSS, IP DCN, ONS GNE, IP DCC, and ONS ENE
Figure 13-31 shows OSI/IP Scenario 1, the current ONS 15454 IP-based implementation, with an IP
DCN, IP-over-PPP DCC, and OSPF routing.
Figure 13-31 OSI/IP Scenario 1: IP OSS, IP DCN, ONS GNE, IP DCC, and ONS ENE
13.7.9.2 OSI/IP Scenario 2: IP OSS, IP DCN, ONS GNE, OSI DCC, and Other Vendor ENE
OSI/IP Scenario 2 (Figure 13-32) shows an ONS 15454 GNE in a multivendor OSI network. Both the
ONS 15454 GNE and the other vendor NEs are managed by an IP OSS using TL1 and FTP. The
ONS 15454 is also managed by CTC and Cisco Transport Manager (CTM). Because the other vendor
NE only supports TL1 and FTAM over the full OSI stack, the ONS 15454 GNE provides T–TD and
FT–TD mediation to convert TL1/IP to TL1/OSI and FTAM/OSI to FTP/IP.
1IP OSS manages ONS 15454 using TL1 and FTP.
2DCCs carry IP over the PPP protocol.
3The ONS 15454 network is managed by IP over OSPF.
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IP DCN
IP
IP
CTC/CTM IP OSS
IP
IP/PPP/DCC
ONS GNE
ONS ENE
ONS NE
ONS NE
ONS NE
IP/OSPF
IP/PPP/DCC
IP/PPP/DCC IP/PPP/DCC
1
2
3