1. OSPFv3 Stub Router Advertisement
draft-shishio-ospf-ospfv3-stub
Shishio Tsuchiya
Gunter Van de Velde
Tomohiro Yamagata

2. history 00 - May 30, 2010 published
I have received a lot of feedback cisco and KDDI internal.
01 - Aug 28,2010 published
difference point of between 00 and 01
add author Gunter Van de Velde
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
RFC3137 is informational RFC,but most of venders already support,and a lot of customer are using now.
Wait for time/BGP[RFC3137]
LDP IGP Syncronization [RFC5447]
configuration change [RFC3137]

6. OSPF Stub Router Advertisement
New Flow Of Traffic
OSPF
Primary Flow of Traffic
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”
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,the router can announce set to LSInfinity(0xFFFF).
| 0 |Nt|x|V|E|B| Options |
| Type | | 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 refering RFC3137. such as RFC5443,RFC5286.RFC4970,RFC4915,RFC3277
RFC3137 is stable and well-known.
So I felt RFC3137 should be Standard.