Cambium Networks cnMatrix EX2028 Handleiding (320 Pagina's)

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Management Features 240

Detailed Behavior

The file to download from the TFTP server can be specified using DHCP option 67. If not specified, the

switch will try the following file names in this order: network-config, cambium.cnf, cambium.conf, and

hostname where hostname is the current hostname of the switch.

If no DHCP offer contains option 66 or the TFTP download failed, the switch will release the IP address

and try to acquire a new one after 30 seconds and will keep doing this until the DHCP-based automatic

configuration is either successful or cancelled.

The automatic configuration is cancelled by entering global configuration mode in the CLI, logging into

the Web UI, onboarding on cnMaestro or when 170 seconds have passed since the first DHCP offer.

The automatic configuration is considered successful even if the execution of the script terminated with

errors.

Saving the configuration either manually or via the automatic configuration script will disable the

automatic configuration mechanism until the next factory reset. If the configuration is not saved, the

mechanism will download and execute the configuration on every boot.

Troubleshooting Automatic Configuration

Useful commands for troubleshooting

l

cnMatrix# show logging

CPU Monitor

Managing CPU Monitor

Feature Overview

When enabled, the cnMatrix switch captures the received packets that hit CPU. The packets are saved

within a buffer in RAM and do not persist through a reboot. Once the data is captured, it can be displayed

in hex format to CLI console. CPU Monitor process it will stop automatically if a configuration limit is

reached or if the RAM usage is above 85%.

Data can be exported as a packet capture (PCAP) file to allow for further examination. Parameters are

configured in exec mode and they are temporary. As result, the configuration is not stored within the

switch configuration and does not remain in place after a system reboot.

Limitations

CPU Monitor captures packets only on Rx. The limits are 32 MB for buffer size or 10000 for number of

packets.

Default Values

CPU Monitor is inactive by default.

l

Buffer size value is 10KB.

l

Packet size value is 64 bytes.

l

Number of packets to be captured is 10.

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