error: Failed to add IP neighbor on interface geneve_tunnel258
symptom: VPP crash
test: avf-ethip4--ethip4udpgeneve-1024tun-ip4base 64B 1518B IMIX 1c 2c 4c
frequency: all
testbed: 2n-skx, 2n-clx, 2n-icx
example:

    https://s3-logs.fd.io/vex-yul-rot-jenkins-1/csit-vpp-perf-report-coverage-2202-2n-skx/27/log.html.gz#
    https://s3-logs.fd.io/vex-yul-rot-jenkins-1/csit-vpp-perf-report-coverage-2202-2n-clx/27/log.html.gz#

https://s3-logs.fd.io/vex-yul-rot-jenkins-1/csit-vpp-perf-report-coverage-2206-2n-icx/10/log.html.gz

https://s3-logs.fd.io/vex-yul-rot-jenkins-1/csit-vpp-perf-report-coverage-2210-2n-icx/10/log.html.gz#s1-s1-s1-s1-s1

notes: lower scale tests work