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Cisco Bug: CSCvv40006 - Traceback: IP SLA triggers INJECT_HDR_LENGTH_ER and INJECT_FEATURE_ESCAPE log message

Last Modified

Oct 13, 2020

Products (1)

  • Cisco 4000 Series Integrated Services Routers

Known Affected Releases


Description (partial)

The affected device shows multiple log messages for packets delivered through L2 injection instead of L3:

Aug 14 09:18:53.180: %IOSXE_INFRA-3-INJECT_HDR_LENGTH_ERR: Inject hdr size 1535049760 exceeds limit
Aug 14 09:18:53.181: %LSMPI-4-INJECT_FEATURE_ESCAPE: Egress IP packet delivered via legacy inject path

The log indicated that the packet header size exceeds it limit value. A traceback is accompanied by these logs, TAC assistance is required to decode the messages.

The decode shows that the log is triggered by IP SLA with UDP.

Configuration for IP SLA and UDP:

<div style="font-family:courier;white-space:pre;">
ip sla 2147483647
udp-jitter 50000 source-ip control enable num-packets 1000  interval 10
precision microseconds
operation-packet-priority high
request-data-size 100
response-data-size 100
optimize timestamp 
timeout 5000
ip sla group schedule 2 2147483647 schedule-together frequency 31 start-time now ageout 180 life 3600
ip sla responder
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