PowerPoint -PolicyRepJ

(1)

Rule-based Modular Representation of QoS Policies)

Networking Architecture Workshop 2000-2-3

QoS

QoS

•

IntServDiffServ (IETF)

• Integrated services (IntServ)

• QoS

• !"

• Differentiated services (DiffServ)

• QoS

• #"$—%&'()*"+,-.

(2)

DiffServ

QoS

• ^QoS !"#$%&

QoS()

- !"#$%& !"#$%& !"#$%& !"#$%&

• SNMP

• COPS

• API

(CORBA IIOP)

• CLI ('()*⁾

DiffServ Domain Deploying rules

with MF classifiers

Deploying rules with BA classifiers Policy Server

Application request Operator

command

-

'()*'()*'()*'()*

• SNMP:

+,-^get/set./&

• API:0123.4./&

• 56789:;

( 56:;^).

+,-. )*+,-. )*+,-. )*+,-. )*

• 0<=>:?@AB;&

• CD'./AEFG#HI JK!LM4H?@AB;&

• NOPQRS!"

#LMTUV?@:$%

• /)012345 6789-:6;<$=!">

(COPS""?)

Syntactic and semantic gap

SNMP & MIB

COPS

& PIB

API (IIOP) Policy rules

Network nodes (routers, switches, …) Policy server

(3)

!"

!" ^: #$% &'(&)* #$% &'(&)* #$% &'(&)* #$% &'(&)*

/0123/0123/0123/0123?

• 5WXLMYZ[\]:)*.HJ&

/04567863/04567863/04567863/04567863?

• ^_` ECDaaA[b&

• ()@AB6CDE(FE)45 GH I>

• BJKLM3NIIOGH-*/PQRS*!TI>

/09:;3/09:;3/09:;3/09:;3?

• ^Ecd_`CDae.HJ&

• f)*Egh`i` ejkS)*(OPS5, Nexpert Objectl⁾#mn4o;b&

#$% )*+,

12'<=12'<=12'<=12'<=

• pDcd(building block rules)

• UVW&XYZ[\]IO^_N+&X>

• qr_

• Y!`a>

>?7;@/3>?7;@/3>?7;@/3>?7;@/3?

• DSCP2st(DSCP = DiffServ code point)&

• qr_1Euv&

• DSCPb66445—cde!

• qr_Eiwx#E;&

• fgh6()@ABi45 j=]>

• fgh6Bi 6C)k*,l*5m=]nI6op.

*5m=]>

Building block rule

Building block rule Linking

label Building block

rule

(4)

DiffServ -./01 -./01 -./01 -./01

yz`

{|}~

|}~

yz`

{|}~

|}~

Line Line

{|^/|B}~

Matcher Policer Marker Scheduler

pD q nI6 rsPA/tu

+234,5 +234,5 +234,5

+234,5 ^: 6#$7 6#$7 6#$7 6#$7

Matching9:9:9:9:

• Dm!"cd&

• : if (Source_ip == 192.168.1.*) …;

Policing9:9:9:9:(Metering9:9:9:9:)

• ^a⁽ ⁾!"cd&

• : if (Average_rate <= 1Mbps) …;

Marking9:9:9:9:

• DSCPHBfZ!"cd&

• : if (…) DSCP = 46;

Discarding9:9:9:9:

• iw!"cd&

• : if (…) discard_all;

Scheduling9:9:9:9:

• zya^/`wa!"cd&

• : if (…) queue_priority = 6;

(5)

#$% )*8+

9:A9:A9:A9:A(BCDE/FGBCDE/FGBCDE/FGBCDE/FG)

• if (Source_ip == 192.168.1.*) { if (Average_rate <= 1Mbps) {

DSCP = 46; // EF queue_priority = 6;

} else {

discard_all;

};

#$% )*8+

#$% )*8+ ⁽ 19: 19: 19: 19: ⁾

H12IFGAH12IFGAH12IFGAH12IFGA

• Matchingcd

• if (Source_ip == 192.168.1.*) Label = s1;

• Policingcd

• if (Label == s1 && Average_rate <= 1Mbps) Label = s1_conformant;

if (Label == s1 && Average_rate > 1Mbps) Label = s1_non_conformant;

• Markingcd

• if (Label == s1_conformant) { DSCP = 46; Label = s1_EF; };

• Discardingcd

• if (Label == s1_non_conformant) discard_all;

• Schedulingcd

• if (Label == s1_EF) queue_priority = 6;

(6)

#$% )*8+

#$% )*8+ ⁽ 19: 19: 19: 19: ⁾

JKLM9:@NOPQJKLM9:@NOPQJKLM9:@NOPQJKLM9:@NOPQ?

• 4oZbXKlA;fX:\Hb&

Policing: Classification:

else ?

source_net_1 source_net_1_conformant

source_net_1_nonconformant Discarding:

drop_all_packets

Scheduling: queue_priority = 6;

or Source_IP ==

192.168.0.1 ?

Information_rate

<= 2Mbps ?

Marking: DSCP = 46

source_net_1_EF

;<=

;<= ^{/ API} >?6#$ >?6#$ >?6#$ >?6#$

H9:;12@RS%&TUVWH9:;12@RS%&TUVWH9:;12@RS%&TUVWH9:;12@RS%&TUVW

• SNMP (MIBS⁾

• PIB (PIBS⁾

• API (0123.4S⁾

X5 !Y45MZX5 !Y45MZX5 !Y45MZX5 !Y45MZMIB/PIB

• ^{46th IETF}#⁽¹⁹⁹⁹¹¹⁾

• )v: draft-kanada-diffserv-qospifmib-00.txt

• wxWG/BOF yz:

– RAP WG (Resource Allocation Protocol WG) – CFGMGMT BOF (Configuration Management BOF) – Diffserv WG —{|45

(7)

@) @) @)

@)

DiffServ[/\]9:@9:;12I[/\]9:@9:;12I[/\]9:@9:;12I[/\]9:@9:;12I

^_FGW`

• 5mpDcd^:

matching, policing, marking, discarding, scheduling&

• qr_&

X5 abcYd- e@X5 abcYd- e@X5 abcYd- e@X5 abcYd- e@DiffServfghi/j`fghi/j`fghi/j`fghi/j`

• ^QoS #tS&

• pNO#tS⁽CDaaNO^).

klmnklmnklmnklmn

• cd_`)*X ¡^(COPSx⁾

• }~GR2000,a.

PowerPoint -PolicyRepJ

QoS

DiffServ

-

!"

!"

!"

!" : #$% &'(&)* #$% &'(&)* #$% &'(&)* #$% &'(&)*

#$% )*+,

#$% )*+,

#$% )*+,

#$% )*+,

DiffServ -./01 -./01 -./01 -./01

+234,5 +234,5 +234,5

+234,5 : 6#$7 6#$7 6#$7 6#$7

#$% )*8+

#$% )*8+

#$% )*8+

#$% )*8+

#$% )*8+

#$% )*8+

#$% )*8+

#$% )*8+ ( 19: 19: 19: 19: )

#$% )*8+

#$% )*8+

#$% )*8+

#$% )*8+ ( 19: 19: 19: 19: )

;<=

;<=

;<=

;<= / API >?6#$ >?6#$ >?6#$ >?6#$

@) @) @)

@)

!" ^: #$% &'(&)* #$% &'(&)* #$% &'(&)* #$% &'(&)*

+234,5 ^: 6#$7 6#$7 6#$7 6#$7

#$% )*8+ ⁽ 19: 19: 19: 19: ⁾

#$% )*8+ ⁽ 19: 19: 19: 19: ⁾

;<= ^{/ API} >?6#$ >?6#$ >?6#$ >?6#$