Scenario 8: Dual Gnes On A Subnet; Figure 9-14 Ctc Computer And Ons 15600S Residing Behind Firewalls - Cisco ONS 15600 Reference Manual
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Chapter 9
Management Network Connectivity
Figure 9-13
CTC computer
Figure 9-14
ONS 15600, you must provision the IIOP port on the CTC computer and on the ONS 15600. Each
firewall can use a different IIOP port. For example, if the CTC computer firewall uses IIOP port 4000,
and the ONS 15600 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.
Figure 9-14
CTC Computer and ONS 15600s Residing Behind Firewalls
IIOP port
Private
network
CTC computer
Protected network
If you implement the proxy server, note that all DCC-connected ONS 15600s 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 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 that
GNE fail. CTC disconnects from the failed GNE and from all ENEs for which the GNE was a proxy and
Nodes Behind a Firewall
Unprotected
network
External network
shows a CTC computer and ONS 15600s behind firewalls. For the computer to access the
Firewall
Unprotected
network
Port
filtering
External network
Disconnect the craft computer from the unreachable ONS 15600. Connect to the ONS 15600
through another network ONS 15600 that has a DCC connection to the unreachable ONS 15600.
Disconnect all DCCs to the node by disabling them on neighboring nodes. Connect a CTC computer
directly to the ONS 15600 and change its provisioning.
Firewall
Private
network
Port
filtering
Protected network
Firewall
Private
network
Port
filtering
Protected network
Cisco ONS 15600 Reference Manual, R6.0
9.2.8 Scenario 8: Dual GNEs on a Subnet
IIOP port
ONS 15600
IIOP port
ONS 15600
IIOP port
ONS 15600
IIOP port
ONS 15600
9-17
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