NANOG mailing list thread: https://lists.nanog.org/archives/list/[email protected]/thread/CS25Q74D72EUV3MVHOMT3GNZ5HGRZWGV/

shutdown-bgp-session.bash

#!/usr/bin/env bash

# Configures Juniper router to inject a 0x0b control character to
# "Shutdown Communication" field(RFC 9003) of a BGP cease NOTIFICATION message.
#
# Usage example:
# ./shutdown-bgp-session.bash | ssh [email protected] -p 830 -s netconf


vertical_tab=$'\v'

cat << EOF
<rpc>
  <edit-config>
    <target>
      <candidate/>
    </target>
    <default-operation>merge</default-operation>
    <config>
      <configuration>
        <protocols>
          <bgp>
            <group>
              <name>bgp-notif-msg-test</name>
              <shutdown operation="create">
                <notify-message>${vertical_tab}maintenance</notify-message>
              </shutdown>
            </group>
          </bgp>
        </protocols>
      </configuration>
    </config>
  </edit-config>
</rpc>
]]>]]>

<rpc>
  <commit/>
</rpc>
]]>]]>

<rpc>
  <close-session/>
</rpc>
]]>]]>
EOF