
2-24
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 2 General Troubleshooting
CTC Operation and Connectivity
2.3.13 Calculate and Design IP Subnets
Symptom You cannot properly calculate or design IP subnets on the ONS 15454 SDH.
Table 2-13 describes the potential cause(s) of the symptom and the solution(s).
2.3.14 Ethernet Connections
Symptom Ethernet connections appear to be broken or are not working properly.
Table 2-14 describes the potential cause(s) of the symptom and the solution(s).
Figure 2-11 Ethernet connectivity reference
Table 2-13 Calculate and Design IP Subnets
Possible Problem Solution
The IP capabilities of
the ONS 15454 SDH
require specific
calculations to properly
design IP subnets.
Cisco provides a free online tool to calculate and design IP subnets. Go to
http://www.cisco.com/techtools/ip_addr.html. For information about
ONS 15454 IP capability, refer to the Cisco ONS 15454 SDH Installation
and Operations Guide.
Table 2-14 Calculate and Design IP Subnets
Possible Problem Solution
Improperly seated
connections.
You can fix most connectivity problems in an Ethernet network by following
a few guidelines. See Figure 2-11 when consulting the steps in the “Verify
Ethernet Connections” section on page 2-25.
Incorrect connections.
Virtual
LAN # 1
Device "A"
192.168.1.25
255.255.255.0
VLAN #1 Member
Device "C"
192.168.1.50
255.255.255.0
VLAN #1 Member
Device "D"
192.168.1.100
255.255.255.0
VLAN #1 Member
ONS Node #1
Port #1 VLAN #1
Port #3 VLAN #1
ONS Node #2
Port #1 VLAN #1
Port #2 VLAN #1
Device "B"
192.168.1.75
255.255.255.0
VLAN #1 Member
32167
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