Scenario 3: Using Proxy Arp To Enable An Ons 15454 Gateway - Cisco ONS 15454 DWDM Installation And Operation Manual

Chapter 22 Management Connectivity Reference
device. The LAN device then sends the datagram for the remote ONS 15454 to the MAC address of the
proxy ONS 15454. The proxy ONS 15454 uses its routing table to forward the datagram to the non-LAN
ONS 15454.
Scenario 3 is similar to Scenario 1, but only one ONS 15454 (Node 1) connects to the LAN
(Figure
DCC. Because all three ONS 15454s are on the same subnet, proxy ARP enables ONS 15454 Node 1 to
serve as a gateway for ONS 15345 Node 2 and Node 3.
This scenario assumes all CTC connections are to Node 1. If you connect a laptop to either ONS 15454
Note
Node 2 or Node 3, network partitioning occurs; neither the laptop or the CTC computer can see all nodes.
If you want laptops to connect directly to end network elements, you must create static routes (see
Scenario 5) or enable the ONS 15454 proxy server (see Scenario 7).
Be aware that:
GNE and ENE 15454 proxy ARP is disabled.
•
There is exactly one proxy ARP server on any given Ethernet segment; however, there may be more
•
than one server in an ANSI or ETSI topology.
The proxy ARP server does not perform the proxy ARP function for any node or host that is on the
•
same Ethernet segment.
It is important in
•
the same Ethernet segment as the proxy ARP server.
August 2005
22-3). Two ONS 15454s (Node 2 and Node 3) connect to ONS 15454 Node 1 through the section
Figure 22-3

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

that the CTC workstation be located within the same subnet and on
Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
22-5