Figure - Cisco ONS 15454 DWDM Installation And Operation Manual

Chapter 22 Management Connectivity Reference
Table 22-4
Packets Arriving At
TCC2/TCC2P
Ethernet interface
DCC interface
If you implement the proxy server, note that all DCC-connected ONS 15454s 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:
•
•
22.2.8 Scenario 8: Dual GNEs on a Subnet
The ONS 15454 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 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
then reconnects through the remaining GNEs. GNE load balancing reduces the dependency on the launch
GNE and DCC bandwidth, both of which enhance CTC performance.
Dual GNEs do not need special provisioning
Note

Figure 22-13

August 2005
Proxy Server Firewall Filtering Rules When Packet Addressed to ONS 15454
Rejects
UDP (User Datagram Protocol) packets addressed to
•
the SNMP trap relay port (391)
TCP (Transmission Control Protocol) packets
•
addressed to the proxy server port (1080)
Disconnect the craft computer from the unreachable ONS 15454. Connect to the ONS 15454
through another network ONS 15454 that has a DCC connection to the unreachable ONS 15454.
Disconnect all DCCs to the node by disabling them on neighboring nodes. Connect a CTC computer
directly to the ONS 15454 and change its provisioning.
shows a network with dual GNEs on the same subnet.
Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
22.2.8 Scenario 8: Dual GNEs on a Subnet
22-17