Figure - Cisco ONS 15454 DWDM Installation And Operation Manual

22.2.3 Scenario 3: Using Proxy ARP to Enable an ONS 15454 Gateway

Figure 22-3

IP Address 192.168.1.20
Subnet Mask 255.255.255.0
You can also use proxy ARP to communicate with hosts attached to the craft Ethernet ports of
DCC-connected nodes
Static routes are propagated to all DCC peers using OSPF. The existing proxy ARP node is the gateway
for additional hosts. Each node examines its routing table for routes to hosts that are not connected to
the DCC network but are within the subnet. The existing proxy server replies to ARP requests for these
additional hosts with the node MAC address. The existence of the host route in the routing table ensures
that the IP packets addressed to the additional hosts are routed properly. Other than establishing a static
route between a node and an additional host, no provisioning is necessary. The following restrictions
apply:
Only one node acts as the proxy ARP server for any given additional host.
•
A node cannot be the proxy ARP server for a host connected to its Ethernet port.
•
In Figure
announces that it can reach the ONS 152xx. The ONS 152xx is shown as an example; any network
element can be set up as an additional host.
Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
22-6
Scenario 3: Using Proxy ARP (ANSI and ETSI)
CTC Workstation
IP Address 192.168.1.100
Subnet Mark at CTC Workstation 255.255.255.0
Default Gateway = N/A
ONS 15454 #2
Default Router = N/A
Static Routes = N/A
(Figure 22-4). The node with an attached host must have a static route to the host.
22-4, Node 1 announces to Node 2 and 3 that it can reach the CTC host. Similarly, Node 3
Chapter 22 Management Connectivity Reference
ONS 15454 #1
IP Address 192.168.1.10
Subnet Mask 255.255.255.0
Default Router = N/A
Static Routes = N/A
Ring
LAN A
ONS 15454 #3
IP Address 192.168.1.30
Subnet Mask 255.255.255.0
Default Router = N/A
Static Routes = N/A
August 2005