Method used to determine whether ECC traffic is too heavy

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When the network scale is too large, the ECC communication traffic between NEs might be too heavy for the NE processing capability and cause the SCC boards to reset frequently.
First, check the network scale. The number of NEs on the network must be less than 100. If the network scale exceeds the number, subnet the ECC network and set up a DCN management channel for each subnet.
Second, check the scale of each site. When multiple devices are connected through a hub (or through subrack cascading) to communicate with each other through the extended ECC function of the network ports, the size of the extended ECC network (the total number of servers and clients) cannot be greater than 8. Otherwise, the NE may be reset. When the number of servers and clients is smaller than or equal to 4, either automatic or manual mode can be used. When the number is greater than 4, the manual mode is recommended.

Other related questions:
ECC communication overload
When the network is over-sized and the inter-NE ECC communication scale exceeds the limit for the NE processing capability, the ECC communication load becomes heavy or even the system control board may undergo frequent resets. First, check the network scale. The network contains at most 100 NEs. When the network contains more than 100 NEs, you must divide the network into ECC subnets and set up DCN management channels for each subnet so that the ECC subnets are relatively independent. Second, check the NE scale of each single site. When multiple devices are connected using the HUB (or inter-subrack cascading) and they communicate with each other using the extended ECC function of network ports, the maximum number of NEs (the sum of the server and clients) for extended ECC cannot be greater than 8. If the number exceeds 8, the NEs are likely to be reset. When the number is not greater than 4, extended ECC in auto mode or specified mode can be used. When the number is greater than 4 but less than 8, extended ECC in specified mode is recommended.

What causes packet loss on the port of S series switches
For S series switches (except the S1700), packets will be discarded if traffic is too heavy or burst traffic occurs.

How to determine whether an AP is faulty
Determine whether an AP is faulty using the following methods: 1. Check whether the AP indicators are in normal state. For description of AP indicators, see Indicator Description in the Hardware Installation and Maintenance Guide of an AP. 2. Log in to the AP through the console port, Telnet/STelnet, or the web system, and check whether the login succeeds. Fit APs do not support the web system. - If the login succeeds, the AP works properly. - If the login fails, restore the factory settings of the AP by holding down Default, and then log in to the AP again. If a Fit AP has been added to an AC offline, run the display ap all command on the AC to view the AP state. If the AP state is normal or download but not fault, the AP works properly.

Method used to determine whether the corrected error count is proper
Question: A huge corrected error count commonly exists on OTU boards with FEC. How do I determine whether the number is proper? None Analysis: The corrected error count is associated with bit error rate. Bit error rate = Corrected error count/(Time x Board rate). Answer: The corrected error count is expressed in bits, and the board rate is expressed in bit/s. Therefore, the time must be converted into seconds. For example, the rate of an LWF board is 10 Gbit/s. If the 24-hour corrected error count is 5 million, the BER is calculated as follows: (500 x 10000)/(24 x 3600 x 10 x 1000000000) = 5.79 x 10E�?. Then, you can determine whether the corrected error count is proper.

Method used to determine whether a board supports tunable wavelengths
On the NMS, query the manufacturer information of the desired board. If "Tunable" is included in the information, the board supports tunable wavelengths.

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