8-16
Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2
78-19417-01
Chapter 8 Management Network Connectivity
Routing Table
If you implement the proxy server, keep the following rules in mind:
1. All DCC-connected ONS 15310-MA SDH nodes on the same Ethernet segment must have the same
Craft Access Only setting. Mixed values produce unpredictable results, and might leave some nodes
unreachable through the shared Ethernet segment.
2. All DCC-connected ONS 15310-MA SDH nodes on the same Ethernet segment must have the same
Enable Firewall setting. Mixed values produce unpredictable results. Some nodes might become
unreachable.
3. If you check Enable Firewall, always check Enable Proxy. If Enable Proxy is unchecked, CTC is not
able to see nodes on the DCC side of the ONS 15310-MA SDH.
4. If Craft Access Only is checked, check Enable Proxy. If Enable Proxy is not checked, CTC is not
able to see nodes on the DCC side of the ONS 15310-MA SDH.
If nodes become unreachable in cases 1, 2, and 3, you can correct the setting with one of the following
actions:
• Disconnect the craft computer from the unreachable ONS 15310-MA SDH. Connect to the ONS
15310-MA SDH through another ONS 15310-MA SDH in the network that has a DCC connection
to the unreachable node.
• Disconnect the Ethernet cable from the unreachable ONS 15310-MA SDH. Connect a CTC
computer directly to the ONS 15310-MA SDH.
8.3 Routing Table
ONS 15310-MA SDH routing information appears on the Maintenance > Routing Table tabs. The
routing table provides the following information:
• Destination—Displays the IP address of the destination network or host.
• Mask—Displays the subnet mask used to reach the destination host or network.
• Gateway—Displays the IP address of the gateway used to reach the destination network or host.
• Usage—Shows the number of times the listed route has been used.
• Interface—Shows the ONS 15310-MA SDH interface used to access the destination.
Table 8-4 Proxy Server Firewall Filtering Rules When the Packet is Addressed to the ONS
15310-MA SDH
Packets Arrive At Accepts Rejects
15310E-CTX-K9
LAN port
• All User Data gram Protocol (UDP)
packets except those in the
Rejected column
• UDP packets addressed to the
SNMP trap relay port (391)
DCC interface • All UDP packets
• All TCP packets except those
packets addressed to the Telnet and
SOCKS proxy server ports
• OSPF packets
• Internet Control Message Protocol
(ICMP) packets
• TCP packets addressed to the
Telnet port
• TCP packets addressed to the proxy
server port
• All packets other than UDP, TCP,
OSPF, ICMP