What does `BGP.23 [t]: 00 00 ca 6a` mean?

[Benjamin Collet]

Hello Marek,

On Fri, Mar 17, 2023 at 08:23:36AM +0100, Marek Küthe wrote:
> What does `BGP.23 [t]: 00 00 ca 6a` mean? I have never seen this before
> in bird.

That's a Only to Customer (OTC) BGP attribute[1] set by AS51818 (which
is I assume the ASN of the RS you're getting the route from):

  BGP.23 : Attribute 0x23 (35)[2]
  0x0000CA6A : 51818

Kind regards,
Benjamin

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[1] https://www.rfc-editor.org/rfc/rfc9234.html#prevention_attribute
[2] https://www.iana.org/assignments/bgp-parameters/bgp-parameters.xhtml
-- 
Benjamin Collet