Output only. Output Only Whether the attachment's BGP session
requires/allows/disallows BGP MD5 authentication. This can take one of
the following values: MD5_OPTIONAL, MD5_REQUIRED, MD5_UNSUPPORTED.
Output only. Output Only List of ASN ranges that the remote location is known to
support. Formatted as an array of inclusive ranges {min: min-value, max:
max-value}. For example, {min: 123, max: 123}, {min: 64512, max: 65534}
allows the peer ASN to be 123 or anything in the range 64512-65534.