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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter12 CTC Network Connectivity
12.2.5 Scenario 5: Using Static Routes to Connect to LANs
Figure12-5 Scenario 4: Default Gateway on a CTC Computer
12.2.5 Scenario 5: Using Static Routes to Connect to LANs
Static routes are used for two purposes:
•To connect ONS 15454 SDH nodes to CTC sessions on one subnet that are connected by a router to
ONS 15454 SDH nodes residing on another subnet. (These static routes are not needed if OSPF is
enabled.) Scenario 6 shows an OSPF example.
•To enable multiple CTC sessions among ONS 15454 SDH nodes residing on the same subnet.
In Figure 12-6, one CTC residing on subnet 192.168.1.0 connects to a router throug h interface A. (The
router is not set up with OSPF.) ONS 15454 SDH nodes residing on different subnets are c onnected
through Node 1 to the router through interface B. Because Nodes 2 and 3 are on different subnets, pro xy
ARP does not enable Node 1 as a gateway. To connect to CTC computers on LAN A, a static route is
created on Node 1.
CTC Workstation
IP Address 192.168.1.100
Subnet Mask at CTC Workstation 255.255.255.0
Default Gateway = 192.168.1.10
Host Routes = N/A
ONS 15454 SDH #2
IP Address 192.168.2.20
Subnet Mask 255.255.255.0
Default Router = N/A
Static Routes = N/A
ONS 15454 SDH #1
IP Address 192.168.1.10
Subnet Mask 255.255.255.0
Default Router = N/A
Static Routes = N/A
ONS 15454 SDH #3
IP Address 192.168.3.30
Subnet Mask 255.255.255.0
Default Router = N/A
Static Routes = N/A
LAN A
SDH RING
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