Community discussions

MikroTik App
 
User avatar
MattC86
newbie
Topic Author
Posts: 25
Joined: Tue Jan 31, 2012 10:26 am
Contact:

CRS317-1G-16S+ Interface drops

Sat Apr 17, 2021 8:44 am

Good day guys,

Ever had an interface be UP but not running?

Scenario
10G fibre link that runs over POTN, and sometimes when there is a break in the transmission network I will get a port down on the CRS317 with 10G sfp+ in.
Auto neg is disabled
Link is forced 10G
MTU and L2MTU reduced back to default to troubleshoot, no difference.

Enabling additional logging revealed only that the status flags change from “UP,RUNNING” to just “UP” (never knew MT had a separate flag for that)
Apr/16/2021 16:17:07 interface,info error: sfp-sfpplus1 link down
Apr/16/2021 16:17:07 route,debug,event error: Interface change
Apr/16/2021 16:17:07 route,debug,event error: interface=sfp-sfpplus1
Apr/16/2021 16:17:07 route,debug,event error: status=UP
Apr/16/2021 16:17:07 route,debug,event error: mtu=1500
Apr/16/2021 16:17:07 route,debug,event error: Link down
Apr/16/2021 16:17:07 route,debug,event error: interface=sfp-sfpplus1
Apr/16/2021 16:17:07 route,debug,event error: Update
Apr/16/2021 16:17:07 route,debug,event error: interface=sfp-sfpplus1
Apr/16/2021 16:17:37 interface,info error: sfp-sfpplus1 link up (speed 10G, full duplex)
Apr/16/2021 16:17:37 route,debug,event error: Interface change
Apr/16/2021 16:17:37 route,debug,event error: interface=sfp-sfpplus1
Apr/16/2021 16:17:37 route,debug,event error: status=UP,RUNNING
Apr/16/2021 16:17:37 route,debug,event error: mtu=1500
Apr/16/2021 16:17:37 route,debug,event error: Link up
Apr/16/2021 16:17:37 route,debug,event error: interface=sfp-sfpplus1
Apr/16/2021 16:17:37 route,debug,event error: Update
Apr/16/2021 16:17:37 route,debug,event error: interface=sfp-sfpplus1

Lazer Tx and Rx is NEVER interrupted.

I have swopped SFPs already, no change, no amount of ROS up or downgrade has an effect.
The only clue is it take just around 30sec every time to restore back to RUNNING, which points to an ethernet protocol rebuilding, but what and where? That is todays brain teaser, have at it and thanks in advance for any ideas!

Who is online

Users browsing this forum: amt, Bing [Bot], Google [Bot], JesusUve, Kipk, kkeyser and 77 guests