BGP daemon behind the "routing-protocol-redirect" port can now successfully form BGP unnumbered sessions if LRP sends out periodic RAs. This was not previously possible, but it was fixed in [0] and [1].
[0] https://github.com/ovn-org/ovn/commit/ebe5d70122ce0f74067858f5cb19276c852a81da [1] https://github.com/ovn-org/ovn/commit/744340f701b0449be7737f0d388af940fd117dc4 Acked-by: Dumitru Ceara <[email protected]> Signed-off-by: Martin Kalcok <[email protected]> --- ovn-nb.xml | 41 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 40 insertions(+), 1 deletion(-) diff --git a/ovn-nb.xml b/ovn-nb.xml index 426bff320..9ae423ebb 100644 --- a/ovn-nb.xml +++ b/ovn-nb.xml @@ -3735,7 +3735,9 @@ or <column name="ipv6_ra_configs" key="send_periodic"> If set to true, then this router interface will send router - advertisements periodically. The default is false. + advertisements periodically. This option has no effect if <ref + column="ipv6_ra_configs" key="address_mode"/> is not set. The default + is false. </column> <column name="ipv6_ra_configs" key="max_interval"> @@ -3872,6 +3874,43 @@ or <code>BFD</code> (forwards UDP port 3784) </li> </ul> + <p> + Note that for BGP to work in "unnumbered mode" (advertising IPv4 + routes over IPv6 network, with automatic on-link peer discovery), + Logical Router Port needs to enable sending of periodic IPv6 Router + Announcements (see the <ref column="ipv6_ra_configs" + key="send_periodic"/>). + + Recommended minimal configuration of periodic RAs for BGP unnumbered: + + <ul> + <li> + <ref column="ipv6_ra_configs" key="address_mode"/> + = <code>slaac</code> (Any valid value is OK, but the option + needs to be set) + </li> + <li> + <ref column="ipv6_ra_configs" key="send_periodic"/> + = <code>true</code> + </li> + <li> + <ref column="ipv6_ra_configs" key="max_interval"/> + = <code>10</code> + </li> + <li> + <ref column="ipv6_ra_configs" key="min_interval"/> + = <code>5</code> + </li> + </ul> + + Feel free to adjust max and min interval values, but be aware that + they influence speed at which the initial BGP session is + established. With the above values, the session will be established + in 5 to 10 seconds. + + Please refer to RFC 8950 for more details about advertising IPv4 + networks over IPv6 next-hop addresses. + </p> </column> <column name="options" key="gateway_mtu_bypass"> -- 2.45.2 _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
