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Cisco ONS 15310-CL, ONS 15310-MA, and ONS 15310-MA SDH Ethernet Card Software Feature and Configuration Guide, R9.1 and R9.2
78-19415-01
Chapter 17 CE-Series Ethernet Cards
CE-100T-8 Ethernet Card
Ethernet frames without VLAN tagging use ToS-based priority queueing if both ToS and CoS priority
queueing is active on the card. The CE-100T-8 card’s ToS setting must be lower than 255 (default) and
the CoS setting lower than 7 (default) for CoS and ToS priority queueing to be active. A ToS setting of
255 (default) disables ToS priority queueing, so in this case the CoS setting would be used.
Ethernet frames with VLAN tagging use CoS-based priority queueing if both ToS and CoS are active on
the card. The ToS setting is ignored. CoS based priority queueing is disabled if the CoS setting is the 7
(default), so in this case the ToS setting would be used.
If the CE-100T-8 card’s ToS setting is 255 (default) and the CoS setting is 7 (default), priority queueing
is not active on the card, and data gets sent to the default normal traffic queue. Also if data is not tagged
with a ToS value or a CoS value before it enters the CE-100T-8 card, it gets sent to the default normal
traffic queue.
Note
Priority queuing has no effect when flow control is enabled (default) on the CE-100T-8. Under flow
control a 6 kilobyte single-priority first in first out (FIFO) buffer fills, then a PAUSE frame is sent. This
results in the packet ordering priority becoming the responsibility of the external device, which is
buffering as a result of receiving the PAUSE flow-control frames.
Note
Priority queuing has no effect when the CE-100T-8 is provisioned with STS-3C circuits. The STS-3c
circuit has more data capacity than Fast Ethernet, so CE-100T-8 buffering is not needed. Priority queuing
only takes effect when buffering occurs.
RMON and SNMP Support
The CE-100T-8 card features remote monitoring (RMON) that allows network operators to monitor the
health of the network with a network management system (NMS). The CE-100T-8 uses the ONG RMON.
The ONG RMON contains the statistics, history, alarms, and events MIB groups from the standard
RMON MIB, as well as Simple Network Management Protocol (SNMP). A user can access RMON
threshold provisioning through TL1 or CTC. For RMON threshold provisioning with CTC, refer to the
Cisco ONS 15454 Procedure Guide and the Cisco ONS 15454 Troubleshooting Guide. For TL1
information, refer to the Cisco ONS SONET TL1 Command Guide.
Statistics and Counters
The CE-100T-8 has a full range of Ethernet and POS statistics under Performance > Ether Ports or
Performance > POS Ports. These are detailed in the “Performance Monitoring” chapter of the
Cisco ONS 15454 Reference Manual.
4 5, 6, 7
3 4, 5, 6, 7
2 3, 4, 5, 6, 7
1 2, 3, 4, 5, 6, 7
0 1, 2, 3, 4, 5, 6, 7
Table 17-2 CoS Priority Queue Mappings (continued)
CoS Setting in CTC CoS Values Sent to Priority Queue