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Re: SFP disables on MS225 when it restarts

by in Switching
‎Oct 5 2020 7:35 AM
‎Oct 5 2020 7:35 AM
Hello redsector,   This has been happening on Meraki's 225 on a stack and on a single switch.  It happens both whenever we do an update to the firmware or when we reboot it.  I have increased the UDLD errdisable interval and this didn't work.  I went into the 9300 and disabled the UDLD and then this stays working when I update it or reboot the switch.  I will open a ticket with TAC for the 9300 to see what their thoughts are. ... View more

SFP disables on MS225 when it restarts

by in Switching
‎Dec 26 2019 6:05 PM
‎Dec 26 2019 6:05 PM
I have various MS225 switches that are connected to a Cisco 9300 via Multimode Fiber SC connections.  They use GLC-SX-MMD 1Gb transceivers on each switch.  The 9300 is using the same on it's TenGigabit Interface, a 1Gb GLC-SX-MMD.  When we perform an firmware update on the Meraki's or when the Meraki's shut down due to a long term power outage, then I have to reset the GigTen ports on the 9300 for the 2 switches (9300 to MS225) to communicate.   The logs on the 9300 state a Dec 26 18:54:24: %UDLD-4-UDLD_PORT_DISABLED: UDLD disabled interface Te1/1/4, aggressive mode failure detected Dec 26 18:54:24: %PM-4-ERR_DISABLE: udld error detected on Te1/1/4, putting Te1/1/4 in err-disable state.   Any ideas?  Do I have a bad SFP or cable?  We have tried changing them with newer fiber cables and SFP but they still do this when I have an upgrade or power outage.  Otherwise, once they work, after multiple port reset, they stay on permanently or until they get restarted.   Thoughts? ... View more
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