Cisco SD-WAN : CAT8300 with Bug CSCwb20082
Cisco SD-WAN : CAT8300 with Bug CSCwb20082
Fig 1.1- Cisco SD-WAN : CAT8300 with Bug CSCwb20082
When you see you are hit with the Bug "CSCwb20082" which means its Flash disk full on your local router and you may encountered this problem where Hundreds of thousands of sdavc packs that never seem to be cleared out are filling up the router bootflash.
Due to a shortage of storage space, this has so far resulted in one of our routers failing; the device was non-functional and the cEdge services would not start. Because of these sdavc packs, we are observing another router that has now hit 100% use on the bootflash.
- Model : C8300 SD-WAN Router
- Version : 17.3.4
Lets check where is the problem on the router:
Step 1: Run the below command, See below in red eating your Flash Memory
NDNA_R1#show platform hardware qfp active feature nbar client function sci_cpr_non_batch_show_info
Non-graph batch sender info:
Non-graph batch sender info:
is_initialized: TRUE
is_batch_in_progress: TRUE
num_of_batches_created: 16866
num_of_batches_destroyed: 16865
num_of_errs_not_initialized: 0
num_of_errs_invalid_batch_pointer: 0
num_of_errs_wrong_batch_id: 2486790
num_of_errs_invalid_batch_state: 0
num_of_errs_batch_in_progress: 0
num_of_errs_msg_reset_failed: 0
num_of_errs_failed_to_create: 0
num_of_errs_invalid_batch: 0
num_of_errs_failed_to_show_batch_info: 0
num_of_errs_failed_to_destroy_batch: 0
num_of_errs_invalid_msg_buffer: 0
num_of_errs_failed_to_parse_header: 0
num_of_errs_failed_to_process_msg: 2486790
Non-graph batch info:
batch_id: 16866
batch_state: NON_GRAPH_BATCH_STATE_MSG_RECEIVED
total_num_of_msgs_in_batch: 0
total_num_of_records_in_batch: 0
Step 2: Check on the pp_count on your router which seems high as well If you see above the bootflash memory is on 97% which is in Critical state as shown above. It may possible you will hit with the bug "CSCwb20082"
NDNA_R1#dir sdavc | count pp_update
Number of lines which match regexp = 11391
Step 3: Now check the Platform Resources with the below command to understand if the platform is healthy, warning or Critical.
NDNA_R1#sh platform resources
**State Acronym: H - Healthy, W - Warning, C - Critical
Resource Usage Max Warning Critical State
----------------------------------------------------------------------------------------------------
RP0 (ok, active) H
Control Processor 14.34% 100% 80% 90% H
DRAM 4449MB(62%) 7065MB 88% 93% H
bootflash 7045MB(97%) 7338MB 70% 90% C
harddisk 797MB(6%) 14534MB 90% 95% H
ESP0(ok, active) H
QFP H
DRAM 260437KB(33%) 786432KB 85% 95% H
IRAM 207KB(10%) 2048KB 85% 95% H
CPU Utilization 1.00% 100% 90% 95% H
B4Q Pool 124 7KB(0%) 1686KB 75% 85% H
B4Q Pool 128 4KB(0%) 1740KB 75% 85% H
B4Q Pool 256 9KB(0%) 3481KB 75% 85% H
B4Q Pool 512 17KB(0%) 4177KB 75% 85% H
B4Q Pool 1024 64KB(0%) 7736KB 75% 85% H
B4Q Pool 1536 87KB(0%) 11247KB 75% 85% H
B4Q Pool 2048 56KB(0%) 14744KB 75% 85% H
B4Q Pool 4096 152KB(0%) 28696KB 75% 85% H
B4Q Pool 8192 328KB(0%) 37704KB 75% 85% H
B4Q Pool 16384 0KB(0%) 51808KB 75% 85% H
B4Q PMD 38172KB(11%) 325248KB 75% 85% H
Read this bug : https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwb20082
To fix, upgrade the router to the newer Version of 17.9.3a
