Scenario 8: Dual Gnes On A Subnet - Cisco ONS 15600 Reference Manual

Chapter 9 Management Network Connectivity
Figure 9-13
CTC computer
Figure 9-14
the ONS 15600 SDH, you must provision the IIOP port on the CTC computer and on the
ONS 15600 SDH. Each firewall can use a different IIOP port. For example, if the CTC computer firewall
uses IIOP port 4000, and the ONS 15600 SDH firewall uses IIOP port 5000, 4000 is the IIOP port you
provision for the CTC computer and 5000 is the IIOP port you provision for the ONS 15600 SDH.
Figure 9-14 CTC Computer and ONS 15600 SDHs Residing Behind Firewalls
IIOP port
Private
network
CTC computer
Protected network
If you implement the proxy server, note that all DCC-connected ONS 15600 SDHs on the same Ethernet
segment must have the same gateway setting. Mixed values produce unpredictable results, and might
leave some nodes unreachable through the shared Ethernet segment.
If nodes become unreachable, correct the setting by performing one of the following actions:
•
•

9.2.8 Scenario 8: Dual GNEs on a Subnet

The ONS 15600 SDH provides GNE load balancing, which allows CTC to reach ENEs over multiple
GNEs without the ENEs being advertised over OSPF. This feature allows a network to quickly recover
from the loss of a GNE, even if the GNE is on a different subnet. If a GNE fails, all connections through
78-18400-01
Nodes Behind a Firewall
Unprotected
network
External network
shows a CTC computer and ONS 15600 SDHs behind firewalls. For the computer to access
Firewall
Unprotected
network
Port
filtering
External network
Disconnect the craft computer from the unreachable ONS 15600 SDH. Connect to the
ONS 15600 SDH through another network ONS 15600 SDH that has a DCC connection to the
unreachable ONS 15600 SDH.
Disconnect all DCCs to the node by disabling them on neighboring nodes. Connect a CTC computer
directly to the ONS 15600 SDH and change its provisioning.
Firewall
Private
network
Port
filtering
Protected network
Firewall
Private
network
Port
filtering
Protected network
Cisco ONS 15600 SDH Reference Manual, Release 9.0
9.2.8 Scenario 8: Dual GNEs on a Subnet
IIOP port
ONS 15600 SDH
IIOP port
ONS 15600 SDH
IIOP port
ONS 15600 SDH
IIOP port
ONS 15600 SDH
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