Routing SIG
Thursday 26 October 2000, Novotel Brisbane
Minutes
Meeting commenced: 09:00
Chair: Philip Smith
- Presentations
- Internet BGP Table Analysis
- Towards Millisecond IGP Convergence
- Summary from RIPE routing WG - coordinated route flap dampening parameters
- Fixing the relationship between IPv4 address allocations and Globally visible routing announcements
- IRR Replication and Authorization Model
- IRR Scalability
Geoff Huston, Telstra
[ Presentation (PDF) ]
This presentation summarised an analysis of BGP table data, showing exponential growth trends primarily due to multihoming. The analysis also noted a marked increase in the number of routes with prefix length greater than /24.
Questions and Discussion
There was a comment that although this analysis show linear AS growth, a similar analysis in the ARIN region showed exponential growth. It was explained that this may be due to the varying time frames analysed.
In response to a question, the presenter explained that he had found an average path length of 4.53 ASes.
There was a question about the effect of the RIR changing to /20 minimum allocations. It was noted that the change in policy had an almost immediate effect on the route table. The presenter explained that the next step in this analysis may be to map this data against the allocation databases to correlate allocations to routing information.
Cengiz Alaettinoglu, Packet Design
[ Presentation (PDF) ]
This presentation summarised an analysis of ISIS routing protocol convergence by showing its behavior upon link/router failures and repairs, its scaling properties to large networks, and explaining changes needed in the ISIS specification and implementations to reach IGP convergence in milliseconds.
Philip Smith, Cisco Systems
[ Presentation (PDF) ]
This presentation outlined the required revisions to RIPE-210 regarding the recommended paramters for route flap dampening.
James Spenceley, COMindico
[ Discussion paper ]
The presenter sought feedback on a proposal to limit the number of globally visible routes associated with each (individual) RIR allocation in order to prevent possible exponential routing table growth.
Questions and Discussion
There was a brief discussion as to the possible role of ISPs in regulating the number of routing announcements of downstream networks.
The presenter was asked to clarify why he is suggesting that IP registries should become involved in the operational issues relating to routing. The presenter suggested that the registries may be the only body in a position to take on such a role. It was then suggested that increasing the services required of RIRs may have an impact on RIR fees. A brief discussion followed relating to some possible ways of charging for such services.
There was a comment that to understand the problems in the BGP tables requires understanding the concept of distributed trust. It was suggested that the problem of authenticity in routing information would be a more effective way of tackling the problem.
Cengiz Alaettinoglu, Packet Design
[ Presentation (PDF) ]
This presentation provided an outline of the IRR Replication and Authorization Model.
Kuniaki Kondo, JPNIC
[ Presentation (Powerpoint) | Discussion paper ]
This presentation identified certain changes happening in the operation of IRR, problems arising due to these changes, and suggested appropriate actions.
Paul Wilson announced that the establishment of an APNIC Routing Registry is on APNIC's activity plan.
Note: The scheduled topic Routing Reports and AP Analysis was not presented dues to lack of time.
