Rmon And Snmp Support; Statistics And Counters - Cisco ONS 15454 SDH Configuration Manual

RMON and SNMP Support

Table 24-2
CoS Setting in CTC CoS Values Sent to Priority Queue
4
3
2
1
0
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 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. If data is not tagged with
a ToS value or a CoS value before it enters the CE-100T-8 card, it also gets sent to the default normal
traffic queue.
Priority queuing has no effect when flow control is enabled (default) on the CE-100T-8. When flow
Note
control is enabled, 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.
Priority queuing has no effect when the CE-100T-8 is provisioned with STS-3C circuits. The STS-3c
Note
circuit has more data capacity than Fast Ethernet, so CE-100T-8 buffering is not needed. Priority
queuing only takes effect during buffering.
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. 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, or the Cisco ONS 15454 SDH Procedure Guide and the
Cisco ONS 15454 SDH Troubleshooting Guide.

Statistics and Counters

The CE-100T-8 has a full range of Ethernet and POS statistics information under Performance >
Ether Ports or Performance > POS Ports.
Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
24-6
CoS Priority Queue Mappings (continued)
5, 6, 7
4, 5, 6, 7
3, 4, 5, 6, 7
2, 3, 4, 5, 6, 7
1, 2, 3, 4, 5, 6, 7
Chapter 24 CE-100T-8 Ethernet Operation