IETF 94th
Service Function Chain Use
Cases in Broadband
draft-meng-sfc-broadband-usecases
IETF 94-Yokohama, 5th, Nov 2015
C. Xie, W. Meng, C. Wang & B. Khasnabish
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IETF 94th
Scenarios
NAT+FW+HTTP Filter+…
BNG
CPE
LAST MILE
ACCESS
internet
METRO
EDGE
CORE
Internet Access from Homes
VPN+FW
ES
SR
SR
ES
NAT+FW+HTTP Filter
ACCESS
AGGREGATION
CORE
Access from Enterprises
internet
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IETF 94th
vBNAS & vBNG
SFs
vBNAS
vBNAS
CGN
CGN
DPI
DPI
FW
FW
vBNG
SFFs
SFF
SFF
Switch
CPE
LAST MILE
ACCESS
SFF
SFF
METRO
EDGE
internet
CORE
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IETF 94th
Unified CPE
Bridge
SFs
Community
DC
NAT44
NAT44
NAT64
NAT64
Http
Http
Filter
Filter
PPPoE
PPPoE
Bridge
LAST MILE
ACCESS
METRO
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IETF 94th
IPTV(forked and
nonsymmetric SFC)
STB-1
vSTB
vSTB
STB-2
vSTB
vSTB
vBNAS
vBNAS
QoS
QoS
STB-3
vSTB
vSTB
STB-4
DPI
DPI
CDN
CDN
vSTB
vSTB
STB-5
vSTB
vSTB
vBNAS
vBNAS
QoS
QoS
STB-6
vSTB
vSTB
ISSUES
One SFC? six duplicated SFCs?
One SFP? six duplicated SFPs?
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IETF 94th
•
ISSUE-1
HOW to manage address pools? WHO advertise route
information to external network based on IP address
pools.
Address Pools
Address Pools
SFs
vBNAS
vBNAS
NAT
NAT
GW
SFFs
How to
①
CPE
Switch
steer t
he inb
o
und tra
f
fic???
②
internet
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IETF 94th
ISSUE-2
• For forwarding and control in a stateful
SF, Separation OR Centralization
SFs
NAT
NAT
Sessions
SFFs
SFF
SFF
GW
SFFs
①
②
CPE
Switch
internet
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IETF 94th
Next Step
•
•
Solicit more comments.
Adopt the document as a WG item?
8