[Note - One still unresolved issue from Munich surrounds the assignment (or non-assigment) of addresses from the IPv4 Local Admin Scope. This issue was raised by the people from SRCLOC WG, and has yet to be resolved. -- DM] MBONE Deployment (MBONED) WG minutes ------------------------------------- 39th IETF August, 1997 Munich, Germany MBONED Working Group, Wed 1:00-3:15 ----------------------------------- Chaired by David Meyer Minutes recorded by Dino Farinacci Dave Meyer Active Drafts - There are 7 active drafts: Pruning, rate-liming guide, admin-ip-scope, irmp-some-issues, intro-multicast, mdh, sntp-heart Charter included - draft-gentile-multicast-deployment-00.txt needs an owner - RPSL support for tunnels is done John Hawkinson - Pruning Draft Status - Some editorial changes and resubmitted to meet IESG requirements - Send out for last call - Done in 15 seconds Dave Meyer - Draft Updates draft-ietf-mboned-intro-multicast-02.txt - IESG is chewing on it (Informational RFC) draft-ietf-mboned-admin-ip-scope-03.txt - Also at the IESG (BCP draft) - There was a request to allocate a portion of the administratively scoped address range - Service Location people requested a 1024 sized block of group addresses - Steve Casner indicated two ways to solve this problem: o Use a single address that bootstraps other addresses o Use a single address and have SAP allocate the other addresses - Functional allocations should be allocated by IANA. The working group may allocate a range to IANA - Concensus, is to modify the draft to allow IANA to assign address in a subrange. Dave Thaler - (for Rusty Eddy) PIM-SM Interop Testing - gated and cisco's running in the lab o tested C-RP and C-BSR scenarios o Hellos and DR election o C-RP hash function o BSR election and RP-st distribution o IGMP reports and leaves o simple join/prune o register encap/decap in both direction (csico ,-> gated) o register-top from cisco to gated o SPT join from cisco to gated - to be tested o Assert mechanism o more extensive join/prune o SPT from gated to cisco o interop with pimd (run over the same unix kernel) o stress testing o http://catarina.usc.edu/pim (implementation section) Dave Thaler - Some DVMRP Route Observations - http://www.merit.edu/mbone/.stats.html - Days in June/July monitored DVMRP routing table o periodic updates/min 21.07/30.77/41.50 95/96/97 report packets o triggered updates 8.09/9.73/68.30 95/96/97 o metric changes 37.994/93.84/342.36 95/96/97 - 95 - 2500 routes, 96 - 4000 routes, 97- 5000 routes - Top 100 unstable routes o 82 are /24s from one provider Jeff Smith - A New Multicast Debugging Tool (mtool) - NTT developing a monitoring tool for corporate multicast networks. Sue Hares - Multicast Additions for RPSL - Generate Multicast Configurations requires Interface Policy - No interface policy in current RPSL and multicast requires interface policy Martin Tatham - ftp://ftp.labs.bt.com/pub/idmr/bt_idmr_reg.tar.gz Shared Trees - Distinct policy on "Cores" John Meylor - IPMI Update - IPMI is building a "Multicast Channel" to provide content to expedite multicast deployment MBONED Working Group, Wed 7:30-10:00 ------------------------------------ Chaired by David Meyer Minutes recorded by Dino Farinacci Liming Wei - MRSM o Goals - Use to detect faults in multicast routing - Isolate location of fault - Reliability - Security concerns - Want to have good coverage of faults - Good Extensibility - Low overhead o What is a fault - Topological disconnectivity - Blackholes in forwarding path - Excessive/persistent packet losses - Excessive duplicates o Now use - mtrace, rsh, traceroute, a combination of o Protocol Components - MRSM monitor, Test Sender (TS), Test Receiver (TR) o Protocol Messages - Beacon, Monitor Requests, Statistics Reports Van Jacobson - DVMRP Route (In)Stability in the MBONE (preliminary results) o During average hour, 5500 routes, 66% were stable. o But ~3000 routes were changing. o Instability caused by a protocol implementation. o http://ganef.cs.ucla.edu/~masseyd/Route for further information on route stability. Mark Handley - Admin Scope Zone Discovery o Larger scope zones can be flooded through local scope zones using an address from the local scoped zone. o Flooded with reverse path checks. o Requirement is to not originate an advertisement in x time after receiving one. o Use ID to suppress loops between local scoped zones. David Meyer - Assignment of Admin Scoped Addresses o How to do assignment? o What is an "appropriate" assignment/allocation? o Who is the allocation "authority" o Additional document required? o Appropriate scopes? Multiple scopes? o Put TBDs in document o Add reference to document describing assignment guidelines o SvrLoc needs 1024 assignments and can't really work with only 1 well-known addresses o Single globally assigned group to bootstrap and get more addresses (scoped using the globally assigned group).