Mark Tinka wrote on 11/08/2023 10:17:
So how would one fumble it to the degree where a fat-finger results in what should be a prepend becoming an AS_PATH?

Genuine question - I have zero experience with Mikrotik in an SP role.

If your asn is 327933, then:

add chain=foo prefix=192.0.2.0/24 action=accept set-bgp-prepend=2

... will produce: "327933 327933", and:

add chain=foo prefix=192.0.2.0/24 action=accept set-bgp-prepend-path=2

... will produce: "327933 2".

Routeros does command completion on the CLI, so this is finger-slip territory, and the two commands are visually similarly enough to each other that it would be easy not to notice.

Nick

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