???G????????????%20??????%20Software%20Defined%20Networks%20(SDN)

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???G???????????? ??????Software Defined
Networks(SDN)
???ast???? ??a?e???s?? ?a? ???t?st?? S?ed?asµ??
???t??? (NETMODE)

• ?s??s? 5

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G???? ?????????S?? ???G????????????? ??????
https//github.com/mininet/mininet/wiki/pdf/mini
net-hotnets2010-final.pdf

• ???e d??t?a??? ??µß?? ??e? d??? t??
• ?S (OS)
• ep?ped? p?????s?? ded?µ???? (forwarding plane)
• ep?ped? e??????(control plane)
• ?? ap?f?se?? p??pe? ?a ?aµß????ta? s??e??at???
• ?p??ad?p?te e?d??? µeta?e???s? pa??t?? ?a p??pe?
  ?a ???eta? a?? ??µß? (ACLs)

• ????? ???e?t???t?ta
• -????? d?a?e???st??? ??st??
• -????t?s? ap? ?atas?/st??
• -??s????a efa?µ???? ?e?t????? p???t????

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G???? ?????????S?? ???G????????????? ??????

• ???e d??t?a??? ??µß?? ??e? d??? t??
• ep?ped? p?????s?? ded?µ???? (forwarding plane)
• ?? ?S t?? d??t??? ???p??e?
• ?e?t????p???µ??? ep?ped? e??????(control plane)
• ?p??ad?p?te p???t??? e?d???? µeta?e???s?? pa??t??

• -?e??µ??? ???e?t???t?ta
• ?aµ??? d?a?e???st??? ??st??
• ????ap??? ?atas?e?ast??
• ??????a efa?µ???? ?e?t????? p???t????

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G???? ?????????S?? ???G????????????? ??????
Network Programmability
SeparateControl-Data plane
L2 topologiesL2-L4 forwarding
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??????S ???OT?S?S ???????O? Forwarding Table (as
defined in OpenFlow)
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OpenFlow v1.0
Rule
Action
Stats
Packet byte counters

1. Forward packet to port(s)
2. Encapsulate and forward to controller
3. Drop packet
4. Send to normal processing pipeline

Optional Actions 1.Enqueue 2.Modify Fields
Switch Port
MAC Src
MAC Dst
Eth Type
VLAN Id
IP Src
IP Dst
IP Prot
TCP/UDP Sport
TCP/UDP Dport
IP TOS
VLANPCP
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?????F?S ???G??? ????????S?SControl
Management interfaces (as defined from ONF)
Management interface
Control interfaces
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(No Transcript)
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???G?????????????S ????GOG??S ??G?S?????Open
vSwitch
Control Plane
Management Plane
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??????O??S ???????Mininet

• S?ed?asµ??? ??a t?? p??s?µ???s? SDN d??t???
• ?????? st? ???s?
• ?????? ap?d?s?? (100 ??µß?? se ??a? ?p?????st?)
• ?a OpenFlow-enabled switches µp????? ?a
  e??????ta? e?te ap? t?? built-in e?te ap? ??a?
  e??te???? Controller

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???????G?? ??????G??S
??t??es? Mininet ???s? t?? built-in µe??d?? ??a
t? d?µ??????a t?p?????a? sudo mn --topo
single,3 --controller remote,ip127.0.0.1,port663
3 ??µ??????a custom t?p?????a? --custom
/home/mininet/mininet/custom/topo-4sw-3host.py
--topo mytopo
??e???? t?? OF-Switches mininetgt ovs-vsctl
show mininetgt s1 dpctl add-flow
tcp127.0.0.16634 in_port1,actionsoutput2 mini
netgt s1 dpctl dump-flows tcp127.0.0.16634
??e???? t?? Hosts mininetgt lthostnamegt
command mininetgt h1 ifconfig a mininetgt h1 ping
h2 mininetgt pingall
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???????G?? ???S????S?S FLOW-TABLEdump-flows se
flowtable ap? ??aµµ? e?t????
mininetgt s1 dpctl dump-flows tcp127.0.0.16634 s
tats_reply (xid0x92adc26a) flagsnone
type1(flow) cookie0, duration_sec10s,
duration_nsec171000000s, table_id0,
priority65535, n_packets1, n_bytes98,
idle_timeout10,hard_timeout30, icmp,in_port2,dl
_vlan0xffff,dl_src26469f126a91,dl_dstf602
84d2e499,nw_src10.0.0.2,nw_dst10.0.0.1,nw_to
s0x00,icmp_type0,icmp_code0, actionsoutput1
cookie0, duration_sec10s, duration_nsec14400000
0s, table_id0, priority65535, n_packets1,
n_bytes98, idle_timeout10,hard_timeout30, icmp,
in_port1,dl_vlan0xffff,dl_srcf60284d2e499,
dl_dst6a40eaa37357,nw_src10.0.0.1,nw_dst10
.0.0.3,nw_tos0x00,icmp_type8,icmp_code0, action
soutput2