SG 200-08P

[cosma.papouis1]

Do you know what the applications of the following may be?

We are using a Cisco smart switch (model # SG 200-08P) and pinging the WK2 to check for Ethernet communication.  When “DHCP auto configuration” is enabled the Cisco switch generates a consistant TFTP read request:

Opcode: Read Request (1)

Source File: fp-net.cfg

Type: octet

This subsequently locks up the WK2 for a few seconds at a time and disables Ethernet communication.  If the “DHCP auto configuration” is disabled on the Cisco switch, then there are no problems. 

Test Results:

DHCP Auto Config Enabled:

6ft/Direct PCB – Fail

100m/Direct PCB –Fail

6ft/ Jumper –Fail

100m/ Jumper –Fail

DHCP Auto Config Disabled:

6ft/Direct PCB – Pass

100m/Direct PCB –Pass

6ft/ Jumper –Pass

100m/ Jumper –Pass

[Aleksandra Dargiel]

Hi Cosma,

It maybe too late but nevertheless it may help you or others.

DHCP Autoconfiguration option allows to provision switch from TFTP server, option 66/67 which is sent in DHCP Offer. So if this is not desired behaviour it would make sense to disable DHCP Auto Configuration on our switch or you can also increase the lease time, alternatively set static IP.

It may be useful to take a look at page 63 of admin guide:

http://www.cisco.com/c/dam/en/us/td/docs/switches/lan/csbss/sg200/administration_guide/78-19562.pdf

Regards,

Aleksandra

[cosma.papouis1]

Many thanks, 

I will pass this info on to the relevant people in my company

Cosma