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Cisco Bug: CSCvv17560 - BMP BGP server can lead to CPUHOG and crashes

Last Modified

Oct 04, 2020

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

Crash preceded by notifications such as:

BGP-3-BMP_MEMORY: BMP Memory Utilization currently at X, exceeds threshold Y

SYS-3-CPUHOG: Task is running for (Z)msecs, more than (2000)msecs (5/5),process = iosp_vty_100001_dmi_syncfd_fd_172.
memcmp, mdlist_insert_sorted, bgp_bmp_init_bgp_neighbor, bgp_bmp_neighbor_monitoring_activate, bgp_session_parse, bgp_neighbor_parse, bgp_neighbor, neighbor_command, parse_cmd_internal, parse_cmd, ios_portal_vty_run_cmd, iosp_vty_proc

where X and Y correspond to utilization and threshold in bytes, and Z is the number of milliseconds.

Slow response by BMP server. BGP BMP message transmission is getting backlogged due to TCP not able to transmit at the rate BGP BMP messages are generated. A typical example is a case of high BMP memory utilization and another BGP BMP neighbor being configured while the router is in this state.
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