On Thu, Feb 27, 2025 at 05:32:59PM +0100, Martin Kalcok wrote: > 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]>
Acked-by: Felix Huettner <[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
