1. OSPFv3 Stub Router Advertisement draft-shishio-ospf-ospfv3-stub Shishio Tsuchiya shtsuchi@cisco.com Gunter Van de Veldegvandeve@cisco.com Tomohiro Yamagata to-yamagata@kddi.com

2. history • 00 - May 30, 2010 published • I have received a lot of feedbackcisco and KDDI internal. • 01 - Aug 28,2010 published • difference point of between 00 and 01 • add author Gunter Van de Velde gvandeve@cisco.com • correction of “R-bit” clear behaviors

3. Problem statement • OSPFv3 has “no transit capability”,it is R-bit and v6-bit • OSPFv2 does not has “no transit capability” as the protocol,so most of venders supports RFC3137 as a technique. • OSPFv3 has same metric information field of all of LSAs(except of Link-LSA),so RFC3137 method can be adapted in OSPFv3.

4. Problem statement cont’d • OSPFv3 should support both “R-bit,v6-bit” and “max-metric” as the protocol. • This draft described both methods to archive “OSPFv3 Stub Router advertisements”

5. today’s OSPFv2 operation • RFC3137is informational RFC,but most of venders already support,anda lot of customer are using now. • Wait for time/BGP[RFC3137] • LDP IGPSyncronization [RFC5447] • configuration change [RFC3137]

6. New Flow Of Traffic Primary Flow of Traffic OSPF Stub Router Advertisement OSPF Router can now be upgraded with minimal network interruption router ospf 123 max-metric router-lsa

7. “R-bit,v6-bit” • RFC5340 Errata describe how to process “R-bit,V6-bit” http://www.rfc-editor.org/errata_search.php?rfc=5340&eid=2078 • If router supports “R-bit clear”,router should support wait for BGP or time same as RFC3137.

8. OSPFv2 compatibility mode-max-metric- • OSPFv3 has metric information of all of LSAs(except of Link-LSA.)So,therouter can announce set to LSInfinity(0xFFFF). +-+-+-+--+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 0 |Nt|x|V|E|B| Options | +-+-+-+--+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | 0 | Metric | +-+-+-+--+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Interface ID | +-+-+-+--+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

9. Summary • This draft does not require protocol enhancement • OSPFv3 should suport “R-bit clear” and “max-metric” as the protocol • The draft’s purpose is definition of both modes to avoid confusing for operators.

10. Next Step • accept it is WG item? • informational or standard? • RFC3137 is informational RFC but • RFC3137 was published in 2001,and some vendors has been supported for 8 or 9 years. • A lot of customers are using in their commercial network. • There is some RFCs are referingRFC3137. such as RFC5443,RFC5286.RFC4970,RFC4915,RFC3277 • RFC3137 is stable and well-known. So I felt RFC3137 should be Standard.