24-4
Ethernet Card Software Feature and Configuration Guide, R7.2
January 2009
Chapter 24 CE-100T-8 Ethernet Operation
Administrative and Service States with Soak Time for Ethernet and SONET/SDH Ports
Note Some network devices can be configured to ignore a loss of carrier condition. If a device configure d to
ignore a loss of carrier condition attaches to a CE-100T-8 card at one end, alternative techniques (such
as use of Layer 2 or Layer 3 keep-alive messages) are required to route traffic around failures. The
response time of such alternate techniques is typically much longer than techniques that use link state as
indications of an error condition.
Administrative and Service States with Soak Time for Ethernet and SONET/SDH
Ports
The CE-100T-8 card supports the administrative and service states for the Ethernet ports and the
SONET/SDH circuit. For more information about card and circuit service states, refer to the
“Administrative and Service States” appendix in the Cisco ONS 15454 Reference Manual or the
Cisco ONS 15454 SDH Reference Manual.
The Ethernet ports can be set to the ESM service states including the In-Service, Automatic In-Service
(IS,AINS) administrative state. IS,AINS initially puts the port in the Out-of-Service and Autonomous,
Automatic In-Service (OOS-AU,AINS) state. In this service state, alarm reporting is suppressed, but
traffic is carried and loopbacks are allowed. After the soak period passes, the port changes to In-Service
and Normal (IS-NR). Raised fault conditions, whether their alarms are rep orted or not, can be retrieved
on the CTC Conditions tab or by using the TL1 RTRV-COND command.
Two Ethernet port alarms/conditions, CARLOSS and TPTFAIL, can prevent the port from going into
service. This occurs even though alarms are suppressed when a CE-100T-8 circuit is provisioned with
the Ethernet ports set to the IS,AINS state, because the CE-100T-8 link integrity function is active and
ensures that the links at both ends are not enabled until all SONET and Ethernet errors along the path
are cleared. As long as the link integrity function keeps the end-to-end path down, both ports will have
at least one of the two conditions needed to suppress the AINS-to-IS transition. Therefore, the ports will
remain in the AINS state with alarms suppressed.
ESM also applies to the SONET/SDH circuits of the CE-100T-8 card. If the SONET/SDH circuit is set
up in IS,AINS state and the Ethernet error occurs before the circuit transitions to IS, then link integrity
will also prevent the circuit transition to the IS state until the Ethernet port errors are cleared at both
ends. The service state will be OOS-AU,AINS as long as the administrative state is IS,AINS. When there
are no Ethernet or SONET errors, link integrity enables the Ethernet port at each end. Simultaneously,
the AINS countdown begins as normal. If no additional conditions occur during the time period, e ach
port transitions to the IS-NR state. During the AINS countdown, the soak time remaining is available in
CTC and TL1. The AINS soaking logic restarts from the beginning if a condi tion appears again during
the soak period.
A SONET/SDH circuit provisioned in the IS,AINS state remains in the initial Out-of-Service (OOS)
state until the Ethernet ports on each end of the circuit transition to the IS-NR state. The SONET/SDH
circuit transports Ethernet traffic and counts statistics when link integrity turns on the Ethernet port,
regardless of whether this AINS-to-IS transition is complete.