Hi All,
After I enabled SPAN for three port channels as a source (with 6*40 GB interfaces) and the destination was set to a Gig interface, about a week later I noticed this message appeared:
%TAHUSD-SLOT1-4-BUFFER_THRESHOLD_EXCEEDED: Module 1 Instance 1 Pool-group buffer 90 percent threshold is exceeded!
I suspected that it was related to the SPAN and then I found this:
Instance 1
============
|------------------------------------------------------------------------------------------------------------|
| Output Pool-Group Buffer Utilization (cells/desc) |
| Drop-PG No-drop CPU--PG LCPU-PG RCPU-PG SPAN-PG |
|------------------------------------------------------------------------------------------------------------|
Total Instant Usage (cells) 21900 0 451 0 0 451 |
Remaining Instant Usage (cells) 1676 0 49 0 0 49 |
Peak/Max Cells Used 21935 0 N/A N/A N/A N/A |
Switch Cells Count 23576 0 500 0 0 500 |
Total Instant Usage (desc) 10996 0 451 0 0 373 |
Remaining Instant Usage (desc) 12580 0 49 0 0 127 |
Switch Desc Count 23576 0 500 0 0 500 |
|--------------------------------------------------------------------------------------------------------------------|
| Output UC Pool Buffer Utilization (cells/desc) |
| Pool 0 Pool 1 Pool 2 Pool 3 Pool 4 Pool 5 Pool 6 Pool 7 |
|--------------------------------------------------------------------------------------------------------------------|
Total Instant Usage (cells) 0 0 0 0 0 0 0 0 |
Total Instant Usage (desc) 0 0 0 0 0 0 0 0 |
Peak/Max Cells Used 0 0 0 0 0 0 0 0 |
|--------------------------------------------------------------------------------------------------------------------|
| Output MC Pool Buffer Utilization (cells/desc) |
| Pool 0 Pool 1 Pool 2 Pool 3 Pool 4 Pool 5 Pool 6 Pool 7 |
|--------------------------------------------------------------------------------------------------------------------|
Total Instant Usage (cells) 21900 0 0 0 0 0 0 0 |
Total Instant Usage (desc) 10996 0 0 0 0 0 0 0 |
Total Instant Usage (inq cells) 0 0 0 0 0 0 0 0 |
Total Instant Usage (packets) 10996 0 0 0 0 0 0 0 |
Peak/Max Cells Used 21935 0 0 0 0 0 0 0 |
Although I disabled the SPAN completely and cleared the buffer, the issue remains and I noticed the switch still drops the packet for the destination interface and the number of drops is increasing:
show queuing interface ethernet 1/34 | include SPAN
| SPAN QOS GROUP |
Per Slice Egress SPAN Statistics
SPAN Copies Tail Drop Pkts 1044812
SPAN Input Queue Drop Pkts 0
SPAN Copies/Transit Tail Drop Pkts 1044812
SPAN Input Desc Drop Pkts 0
Would anyone be able to help with this?
Thanks all
