I have a branch site having issues with frame-relay.
The branch is configured with FRTS. Traffic is shaped to 64k/64k(cir/mincir) and adapts to BECN. EEK has been configured for the PVC.
Lately the site is experiencing intermittent frame-relay flaps about 5 - 10 time a day. Router log shows %FR_EEK-FAILED: messages.
show frame relay pvc xxx command shows a lot of output drops and all the output drops are late drops.
I thought that the late output drops were due to high output traffic causing FRTS to shape traffic which makes outout queue overflow and hence packet getting dropped. But when I checked the link utilisation on NetQos it indicates that everytime an EEK failure happened there was a spike in the input traffic (nearly 64K). The output traffic has never been more than 10K at the most.
This phenomenon totally confuses me. Why should output drops/late drops occur when output datarate is much less than the mincir?
Are the late output drops in anyway related to the spike in the input traffic?
And also I dont see any input drops at all.