15-2
Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 15 Management Network Connectivity
15.1 IP Networking Overview
15.1 IP Networking Overview
ONS 15454s can be connected in many different ways within an IP environment:
• They can be connected to LANs through direct connections or a router.
• IP subnetting can create ONS 15454 node groups that allow you to provision nodes in a network that
are not connected with a data communications channel (DCC).
• Different IP functions and protocols can be used to achieve specific network goals. For example,
Proxy Address Resolution Protocol (ARP) enables one LAN-connected ONS 15454 to serve as a
gateway for ONS 15454s that are not connected to the LAN.
• Static routes can be created to enable connections among multiple CTC sessions with ONS 15454s
that reside on the same subnet with multiple CTC sessions.
• ONS 15454s can be connected to Open Shortest Path First (OSPF) networks so ONS 15454 network
information is automatically communicated across multiple LANs and WANs.
• The ONS 15454 proxy server can control the visibility and accessibility between CTC computers
and ONS 15454 element nodes.
15.2 IP Addressing Scenarios
ONS 15454 IP addressing generally has nine common scenarios or configurations. Use the scenarios as
building blocks for more complex network configurations. Table 15-1 provides a general list of items to
check when setting up ONS 15454s in IP networks.
15.2.1 Scenario 1: CTC and ONS 15454s on Same Subnet
Scenario 1 shows a basic ONS 15454 LAN configuration (Figure 15-1). The ONS 15454s and CTC
computer reside on the same subnet. All ONS 15454s connect to LAN A, and all ONS 15454s have DCC
connections.
Table 15-1 General ONS 15454 IP Troubleshooting Checklist
Item What to Check
Link integrity Verify that link integrity exists between:
• CTC computer and network hub/switch
• ONS 15454s (backplane [ANSI] or MIC-C/T/P [ETSI] wire-wrap pins or
RJ-45 port) and network hub/switch
• Router ports and hub/switch ports
ONS 15454
hub/switch ports
If connectivity problems occur, set the hub or switch port that is connected to
the ONS 15454 to 10 Mbps half-duplex.
Ping Ping the node to test connections between computers and ONS 15454s.
IP addresses/subnet
masks
Verify that ONS 15454 IP addresses and subnet masks are set up correctly.
Optical connectivity Verify that ONS 15454 optical trunk ports are in service and that a DCC is
enabled on each trunk port.
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