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Cisco Bug: CSCuj39760 - MC20X20V LC crashed multiple times with UBR10000-3-LB_MODEM_FAILED

Last Modified

Feb 19, 2018

Products (1)

  • Cisco uBR10000 Series Universal Broadband Routers

Known Affected Releases

12.2(33)SCG4

Description (partial)

Symptom:
MC20X20V line card crashed multiple times with the following error message,

SLOT 5/0: Sep  8 02:09:16.172:  UBR10000-3-LB_MODEM_FAILED  Failed to move modem 0023.746c.9e02 from In5/0/4:3 to In5/0/4:1 (549 MHz).

Following traceback decodes were seen for multiple crashes,

0x2850250:cmts_metering_queue_data_and_tx_exec(0x284fe90)+0x3c0
0x2850108:cmts_metering_queue_data_and_tx_exec(0x284fe90)+0x278
0x2850A34:cmts_metering_queue_data_and_tx(0x28509b0)+0x84
0x2851614:cmts_collect_metering_per_hwidb(0x2851260)+0x3b4
0x2850E2C:cmts_collect_metering_process(0x2850c54)+0x1d8
0x22A093C:ppc_process_dispatch(0x22a0918)+0x24


0x2175A64:retparticle(0x2175a64)+0x0
0xFD8AFB0:start_of_pic(0x6ef0000)+0x8e9afb0
0x26D385C:wxb_dma_tx_free_descriptors(0x26d3744)+0x118
0x26D7324:wxb_dma_interrupt_handler(0x26d70fc)+0x228
0x2291B58:ISR_wrapper(0x2291b14)+0x44
0x2D22D88:m8600_interrupt_dispatch(0x2d22c0c)+0x17c
0x2D22D88:m8600_interrupt_dispatch(0x2d22c0c)+0x17c
0x2D21734:ppc_interrupt_dispatch(0x2d21354)+0x3e0
0x2291C14:ppc_interrupt_dispatch_exit(0x2291c14)+0x0
0x2882BF8:cr10k_clnt_fill_xmit_clnt_desc(0x2882bb0)+0x48
0xC:__start(0x2000000)+-0x1fffff4
0x2887DFC:cr10k_clnt_get_buffer_guts(0x2887b88)+0x274
0x2887EE8:cr10k_clnt_get_clnt_buffer(0x2887e38)+0xb0
0x289B880:cr10k_snmp_get_req_buf(0x289b7c0)+0xc0
0x284B3CC:snmp_sync_add_packet_to_request(0x284b34c)+0x80
0x284B8D8:snmp_bg_sync_throttle_proc(0x284b694)+0x244


0x223D7DC:freelist_find_by_size(0x223d7dc)+0x0
0x225BF7C:get_block(0x225bd4c)+0x230
0x2248BF8:malloc(0x22488c8)+0x330
0x2849840:snmp_interval_sync_cmtx(0x2849694)+0x1ac
0x2849F44:snmp_interval_sync_cm_with_cmtx(0x2849ea0)+0xa4
0x2849FEC:snmp_interval_sync_sid_instance(0x2849f94)+0x58
0x284A160:snmp_interval_sync_all_sid_instance(0x284a014)+0x14c
0x284AB7C:snmp_interval_sync(0x284ab08)+0x74
0x284B00C:snmp_bg_sync_collect_proc(0x284ae80)+0x18c
0x22A093C:ppc_process_dispatch(0x22a0918)+0x24

Conditions:
UBR-MC20X20V line card in slot 5/0 running "ubr10k4-k9p6u2-mz.122-33.SCG4" IOS release.
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