Download SGM Support in Mobile IP

SGM* Support in Mobile IP
draft-lee-sgm-support-mobileip-00.txt
Proposal for a WG document
Jiwoong Lee
Korea Telecom M.com
*SGM:
“Small Group Multicast”
in XCAST BOF
[email protected]
Dec 2000, 49th IETF
Scalability Problems
in Mobile IP Multicast
HA
A-mass-ofmulticast
Nested Encap.
Internet
MN1-a
FA
CN
Nested Encap.
MN1-b
Network Congestion!
Tunnel
Convergence*
MN1
HA1
HA2
Internet
HA3
MN2
Internet
FA
CN
MN3
HA4
MN4
HA5
*Refer
[7] in I-D
MN5
Network Congestion!
draft-boivie-sgm-01.txt
Xcast BOF
Small Group Multicast
SGM Datagram
IP Header SGM Header UDP Header
“Level 3.5”
Header
Payload
Unicast Addresses of Destination Nodes
No Tree.
SGM
SGM
Based on Unicast
Routing
Video
Server
Router
Router
Router
Router
Router
Adv: Suitable for
Large number &
Small size Groups
Router
SGM
Router
Xcast: Xcast-enabled router
IM packet
from HA to FA COA MN (I)
Dest: FA1
SGM list: MN1 MN2
Mobile IP Tunneling
SGM
HA
IM packet
Internet
MN1
FA1
CN
MN2
FA2
Dest: FA2
SGM list: MN3
MN3
IM packet
from HA to FA COA MN (II)
SGM list: MN1 MN2 MN3
SGM list: FA1 FA2
Dest: FA1
SGM list: MN1 MN2
HA
IM packet
SGM
SGM
Internet
MN1
FA1
CN
MN2
FA2
Dest: FA2
SGM list: MN3
When Mobile IP supports
“SGM-Tunneling”
MN3
IM packet
from HA to CL COA MN
SGM list: MN1 MN2 MN3
HA
IM packet
Xcast
Internet
MN1
Xcast
CN
MN2
Xcast
MN3

SGM has not fully specified “SGM-IM” yet.
Pros.




Solve out Scalability
Problem
Cons

– FA MAY generate ICMP
error messages
Suitable for upcoming
3G Cellular Networks
Flexible Multicast
Transmission
Violations of generic
Mobile IP Spec.

Class D info in a SGM
header
– SGM is in progress. We
are now discussing this
matter.
Does support SGM in
mobile IP

MTU gets smaller
SGM Support in Mobile IP
draft-lee-sgm-support-mobileip-00.txt
Hereby I propose this I-D for a WG document.
Many remarks please!
Jiwoong Lee
Korea Telecom M.com
[email protected]
Note: Some contents here are augmented in addition to the proposed I-D.
Dec 2000, 49th IETF