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9-4
Cisco ONS 15600 Reference Manual, R7.2
Chapter 9 Management Network Connectivity
9.2.3 Scenario 3: Using Proxy ARP to Enable an ONS 15600 Gateway
Figure 9-2 Scenario 2: CTC and ONS 15600s Connected to Router
9.2.3 Scenario 3: Using Proxy ARP to Enable an ONS 15600 Gateway
Scenario 3 is similar to Scenario 1, but only one ONS 15600 (Node 1) connects to the LAN (Figure 9-3).
Two ONS 15600s (Nodes 2 and 3) connect to Node1 through the SONET data communications channel
(DCC). Because all three ONS 15600s are on the same subnet, Proxy ARP enables Node 1 to serve as a
gateway for Nodes 2 and 3.
Note
This scenario assumes that all CTC connections are to Node 1. If you connect a laptop to either Node 2
or Node 3, network partitioning will occur; neither the laptop or the CTC computer will be able to see
all nodes. If you want laptops to connect directly to end network elements (ENEs), you will need to
create static routes (refer to the “9.2.5 Scenario 5: Using Static Routes to Connect to LANs” section on
page 9-6) or enable the ONS 15600 proxy server (see the “9.2.7 Scenario 7: Provisioning the
ONS 15600 Proxy Server” section on page 9-11).
CTC Workstation
IP Address 192.168.1.100
Subnet Mask 255.255.255.0
Default Gateway = 192.168.1.1
Host Routes = N/A
Router
IP Address of interface “A” to LAN “A” 192.168.1.1
IP Address of interface “B” to LAN “B” 192.168.2.1
Subnet Mask 255.255.255.0
Default Router = N/A
Host Routes = N/A
ONS 15600 #1
IP Address 192.168.2.10
Subnet Mask 255.255.255.0
Default Router = 192.168.2.1
Static Routes = N/A
ONS 15600 #2
IP Address 192.168.2.20
Subnet Mask 255.255.255.0
Default Router = 192.168.2.1
Static Routes = N/A
ONS 15600 #3
IP Address 192.168.2.30
Subnet Mask 255.255.255.0
Default Router = 192.168.2.1
Static Routes = N/A
LAN B
LAN A
Int "A"
Int "B"
SONET RING
81201