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Cisco Bug: CSCvt02534 - ISR4K Unexpectedly Reboots with CENT-BR-0

Last Modified

Sep 16, 2020

Products (14)

  • Cisco 4000 Series Integrated Services Routers
  • Cisco ASR 1000 Series IOS XE SD-WAN
  • Cisco 4221 Integrated Services Router
  • Cisco 4331 Integrated Services Router
  • Cisco ASR 1002-X Router
  • Cisco 4321 Integrated Services Router
  • Cisco ASR 1001-X Router
  • Cisco 4351 Integrated Services Router
  • Cisco ISR 4000 Series IOS XE SD-WAN
  • Cisco ASR 1002-HX Router
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Known Affected Releases


Description (partial)

Crash after a route parent update, but seems that channels are still holding the information.

UNIX-EXT-SIGNAL: Segmentation fault(11), Process = CENT-BR-0
-Traceback= 1#1091664b5590915664dab56b02c82274  :55B3F1862000+963DE40 :55B3F1862000+95FAE9C :55B3F1862000+95FD332 :55B3F1862000+9658E0B :55B3F1862000+96922E7 :55B3F1862000+9600BC8 :55B3F1862000+96137EC :55B3F1862000+5EF1A7C :55B3F1862000+5EF185A :55B3F1862000+961087A :55B3F1862000+5EC7476
#0 cent_rpi_route_channel_user_info_per_nh_from_list 
#1 cent_br_chan_is_head_chan
#2 cent_br_refresh_mc_origin_channels
#3 cent_pfx_xml_decode
#4 reg_invoke_cent_pmi_xml_decode
#5 cent_peering_update
#6 reg_invoke_cent_peering_update
#7 cent_ipc_peering_update_br
#8 cent_process_br_msg
#9 cent_dequeue_br_notify_msg
#10 dispatch_wb
#11 xos_dm_dispatch
#12 cent_br_process
#13 xos_thread_start_int
#14 __be_unix_suspend

This is a day-one issue.
All of below conditions must be met.
1> routing platform,
2> IWAN configured,
3> Network unstable.
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