Cisco 15327 - Manual (Page 386)

23-6
Ethernet Card Software Feature and Configuration Guide, R7.2
Chapter 23 E-Series and G-Series Ethernet Operation
Administrative and Service States with Soak Time for Ethernet and SONET/SDH Ports
As shown in Figure 23-3 , a failure at any point of the path causes the G-Series card at each end to disable
its Tx transmit laser, which causes the devices at both ends to detect a link down. If one of the Ethernet
ports is administratively disabled or set in loopback mode, the port is considered a “failure” for the
purposes of end-to-end link integrity because the end-to-end Ethernet path is unavailable. The port
“failure” also disables both ends of the path.
Administrative and Service States with Soak Time for Ethernet and SONET/SDH
Ports
The G-Series 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 Gigabit Ethernet ports can be set to the service states including the automatic in-service
administrative state (IS, AINS). IS, AINS initially puts the port in the out of service automatic, 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, not
reported (IS-NR). Raised fault conditions, whether their alarms are reported 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 G-Series circuit is provisioned with the
Gigabit Ethernet ports set to IS, AINS state. Because the G-Series link integrity function is active and
ensures that the Tx transmit lasers at either end 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 so the
ports will remain in the AINS state with alarms suppressed.
These states also apply to the SONET/SDH circuits of the G-Series card. If the SONET/SDH circuit had
been setup 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. Service state will be OOS-AU,AINS as long as the admin state is IS,AINS. Once there are no
Ethernet or SONET errors link integrity enables the Gigabit Ethernet TX transmit lasers at each end.
Simultaneously, the AINS countdown begins as normal. If no additional conditions occur during the time
period each 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 condition re-appears
during the soak period.
A SONET/SDH circuit provisioned in the IS, AINS state remains in the initial OOS state until the
Gigabit Ethernet ports on either end of the circuit transition to to the IS, NR state. The SONET/SDH
circuit transports Ethernet traffic and count statistics when link integrity turns on the Gigabit Ethernet
port Tx transmit lasers, regardless of whether this AINS to IS transition is complete.
G-Series Circuit Configurations
This section explains G-Series point-to-point circuits and manual cross-connects. Ethernet manual
cross-connects allow you to bridge non-ONS SONET/SDH network segments.