Here are instructions on how to configure an IP SLA to ping with an IP MTU of 9K and the don't fragment (DF-BIT) set. I used a CSR1000V (IOS XE) running Fuji. This also works on regular IOS. First configure the IP SLA: ip sla 1 icmp-echo <dest IP> source-interface <source int> request-data-size 8964 !vrf …
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