introduction to the ran14.0 feature–enhanced ip pm

7/24/2019 Introduction to the RAN14.0 FeatureEnhanced IP PM

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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved.

Conidentiality! "nternal #se

Introduction to the RA

N14.0 Feature Enhan

ced IP PM

$ireless %roduct &ollout 'epartment


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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. %age(

A)out This Training

This course is )ased on "% %* v1.0. +eore this course, youare supposed to learn the ollowing courses a)out "% %* v1.

0!

"% Transmission on "u) "nterace

"% %* eature v1.0

IP PM V1


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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. Page4

Training -)ects

Ater this training, you are supposed to!

#nderstand the value and application scenarios o "% %* v2.0.

#nderstand the speciications o "% %* v2.0.

/plain the )asic principles o "% %* v2.0.

+e a)le to activate and veriy "% %* )ased on the manual.


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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. %age

Contents

"% %* eature v2.0

1 Feature Introduction

2 eature %lanning

( eature 'eployment

%erormance -ptimi3ation

-4* and Trou)leshooting

5 &eerences and Terms


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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. %age5

"ntroduction6Customer +eneit 4 'riving orce"% %* v1.0 has )een implemented in &A71( )ut has encountered many pro)lems.unctions need to )e enhanced!

819 "% %* over /1:T1 on the +T; side 8meet the reet9

829 ;upport o multi=mode controllers or "% %* in active and stand)y lin> aggregation groups

8(9 The interace )oard pool under the &7C must support "% %* so that "% %* can )e activated in

the uplin> o the &7C.

The "% %* eature needs to )e optimi3ed!

819 The measured pac>et loss rate and pac>et rate may )e incorrect when "% pac>ets are

ragmented.

829 The measured pac>et loss rate is incorrect when the networ>:sender and the receiver are out oorder.

8(9 The ';C% end=to=end inconsistency chec> and alarm unctions must )e added or "% %*.

89 The ormula or calculating the delay variation in "% %* needs to )e uniied on the +;C, and the

precision o pac>et loss rate measurement increases rom 1? to 0.01?.

89 The alarm mechanism needs to )e optimi3ed@ the deault alarm thresholds o "% %* are modiied

8the deault alarm generation and clearance thresholds are modiied into ? and 1?,

respectively9@ ailure causes are displayed.

859 The 7ode+ must support "% %* traic measurement@ the measurement units o counters in "% %*traic measurement on the +;C are incorrect.

"% %* v2.0 solves the preceding pro)lems.


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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. %ageB

"% %* v1 determines whether pac>ets are out o order )ased on *. $hen "% pac>ets are out o order on the transmission

networ>, an * rame arrives at the receiver earlier than service pac>ets in the measurement period. As a result, some

pac>ets are not measured or more pac>ets are measured.

"% %* v2 uses the coloring D window detection solution. The time when an * rame is received is not used as the time

when pac>et measurement ends.

The preceding igure shows the principles o the solution! The sender divides "% pac>ets into two types 8the * rame isused to delimit the "% pac>ets9 and color the two types o pac>ets! all pac>ets in the previous rame are in Cyc A and all

pac>ets in the later rame are in Cyc +. The characteristics o the two rames rotate. The receiver measures data )ased on

"% path "' and Cyc "'. "n Cyc A, the receiver only measures the data that meets the condition o "% path "' and Cyc A@ in

Cyc +, the receiver only measures the data that meet the condition o "% path "' and Cyc +. "n the overlap area o the two

measurement windows, the overlap time should )e greater than the possi)le networ> out=o=order value.

;elect Cyc A:+! The selected Cyc "' must ensure that pac>ets are not changed during transmission. The solution uses the

most signiicant )it in the "' ield o an "% pac>et to identiy Cyc A:+.

"ntroduction6%revention Against -ut=o=-rder! Coloring D $indow 'etection


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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. %ageE

" ';C% remar>ing eists in "% %* v1 on the networ>, "% %* can )e activated )ut "% %* measurement is a)normal.

';C% remar>ing detection is designed or "% %* v2.

'etection upon activation o "% %*! Activation o orward "% %*! 'uring "% %* negotiation, the receiver carries ';C% inormation in an ACT rame and compares

it with the ';C% in the "% pac>et header to chec> whether ';C% remar>ing occurs. Ater detecting ';C% remar>ing, the "%

%* receiver reects "% %* activation and reports the ';C% change in an ACT=ACF message. The initiator generates an "%

%* activation ailure alarm with the alarm cause o ';C% change. $hen the &7C )ac>ward activates "% %* in the uplin> o the 7ode+, the ACT message and the * rame are sent in

dierent directions.

The ';C% value deined in the "% path is used as the ';C% value o the ACT=ACF rame, that is, the ';C% value that is the

same as that o the * rame is used. Ater receiving the ACT=ACF message, the &7C determines whether ';C% remar>ing

occurs. " ';C% remar>ing occurs, the &7C generates an alarm and deactivates "% %* on the 7ode+.

';C% remar>ing detection during measurement!

'uring "% %* measurement, the * receiver can chec> whether the ';C% is changed in real time )y comparing the ';C% value

deined in the "% path with the ';C% value in the "% header o the * rame.

The detection result is included in a +& rame and transerred to the sender. " the sender inds that the ';C% value is changed

in three consecutive +& rames, the sender generates an "% %* measurement threshold crossing alarm with the alarm cause o

';C% remar>ing. " the ';C% value is restored in three consecutive +& rames, the sender clears the alarm.

"ntroduction6';C% &emar>ing 'etection


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"% %* v1 does not provide speciic "% %* activation ailure causes. ;olution!

The solution should not increase the num)er o eisting alarms 8so that the north)ound interace is not aected9 )ut

allows you to ing detection results in the ACT rame are as ollows!

0 to 5(! A value in the range indicates the changed ';C% value ater ';C% remar>ing is detected, that is, "% %*

activation ails. "t is used only in orward "% %* activation and is meaningless in )ac>ward "% %* activation.

5! "% %* activation ails )ecause "% %* is not activated on the local end.

5! "% %* activation ails )ecause the speciication is )eyond the limit.

55! "% %* activation ails )ecause the version does not support "% %* activation.

5! "% %* activation ails )ecause )ac>ward "% %* activation is not supported.

5B! "% %* activation ails )ecause the receiver does not support the


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"ntroduction6Applica)le 7etwor>ing#cenario IP PM v1 IP PM v) "escri*tion

"% over /:/ is applied to the "u) interace. ;upported ;upported $hen "% over /:/ is applied to the "u) interace,"% %* 8v1 or v29 detection can )e adopted on the&7C and 7ode+.

"% over /1:T1 is applied to the 7ode+. 7ot supported ;upported " "% over /1:T1 is applied to the 7ode+, "% %* v2 is

supported.

"% over /1:T1 is applied to the &7C 7ot supported 7otsupported

" "% over /1:T1 is applied to the &7C, "% %* is notsupported.

/thernet ports on the &7C wor> in active:stand)ymode.

;upported ;upported =

LAs on the &7C wor> in active:stand)y mode. 7ot supported ;upported

&oute=)ased load sharing is applied to /thernet portson the &7C.

7ot supported 7otsupported

&oute=)ased load sharing is implemented among)oards. "n this case, "% %* is not supported.

LAs over an &7C interace )oards wor> in loadsharing mode and such interace )oards do not ormany transmission resource pool.

7ot supported 7otsupported =

LAs over an &7C interace )oards wor> in loadsharing mode and such interace )oards orm atransmission resource pool.

= ;upported "% %* v1 is a eature provided )eore &A71. Theinterace )oard pool eature is not provided )eore&A71.

A #niversal Transmission %rocessing unit 8#T&%9)oard is used on a single=mode )ase station.

;upported ;upported "% %* is activated on the #T&% )oard.

A #T&% )oard is used on a multi=mode )ase station. ;upported ;upported or the primary multi=mode )ase station, "% %* isactivated on the #T&% )oard. or other modes o amulti=mode )ase station, it is recommended not to

activate "% %*.7ode+s are cascaded. ;upported ;upported "% %* can )e activated on each 7ode+.

++#s are interconnected. 7ot supported ;upported ++# inter=su)rac> interconnection is not provided)eore &A71.

A transmission resource pool is ormed among the&7C interace )oards.

= ;upported "% %* v1 is a eature provided )eore &A71. Theinterace )oard pool eature is not provided )eore&A71.

"%;ec is ena)led on the 7ode+. = ;upported The "%;ec eature is not provided )eore &A71.


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"ntroduction6&elated eaturesRe+uired 'eatures

$&'=0002 "% Transmission "ntroduction on "u) "nterace

Mutua, e-cusive 'eatures

7one

A''ected 'eatures

"% %* is aected )y $&'=1020B "u) Transmission &esource %ool in &7C.

" "u) Transmission &esource %ool in &7C is activated! -n the &7C, "% %* can )e activated. Activation o this eature re


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"ntroduction6;peciications and &estrictions

"% %* speciications!

"% %* cannot )e used in the ollowing scenarios!

The ';C% is changed )y an intermediate networ>. +eore "% %* is activated, youmust chec> whether the ';C% is changed )y the networ>. " you cannot determinewhether the ';C% is changed, activate "% %* )y 7ode+ or stream. -therwise, alarge num)er o "% %* activation ailure alarms may )e generated. Load=sharing scenario. $hen ports within a )oard or )etween )oards wor> in load

sharing mode, "% %* cannot )e used.

#sage description!

The multi=core /thernet interace )oard -#c:2c o the &7C supports

000 "% %* records, and the 7ode+ supports a maimum o 15 "% %*

records.

"% %* is a passive solution that chec>s networ> perormance online. The

pac>et loss rate o a service is calculated )ased on the measurement o

sent and received pac>ets in the service. The pac>et loss rate depends on

services and can )e calculated only when a service is availa)le.


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Contents

IP PM v).0 Feature

1 eature "ntroduction

) Feature Pannin&

( eature 'eployment





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eature %lanning6Activation ;uggestions and %rere


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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. %age1B

Iersion coniguration*2000! i*anager *2000="" I200&01C00 and later versions

C*/! $&A7 C*/ I200&01 and later versions

&7C! +;C5E00 I200&01C00 and later versions

7ode+! +T;(E00 I200&01C00 and later versions

License control

"% %* is a )asic eature and is not controlled )y a license.

eature conlict

7one

&e


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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. %age1E

7etwor>ingplanning

7one

& planning

7one

Hardwareplanning

The -#c:2c )oard on the &7Csupports "% %* v2 and is compati)le with

"% %* v1@ the -#a:2a )oardsupports "% %* v1.

-n the 7ode+, the interace )oard#T&%:#T&%c:$*%T:#*%T isdeployed.

'ata planning Para$eterNa$e

Para$eter I" "escri*tion "ata #ource

Adacent 7ode"'

ANI 7ode+ where "%%* is to )eactivated

"nternal &7Cdata plan

"% %ath "' PATI" "% path where "%

%* is to )eactivated

"nternal &7C

data plan

"; J-;%ATH I#/#PAT %ath type o the"% path where "%%* is to )eactivated

"nternal &7Cdata plan

"% %ath "' PATI" "' o the "% pathwhere "% %* isto )e activated

"nternal 7ode+data plan

eature %lanning67etwor> %lanning


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Acce*tance *annin& 7one

%age20

eature %lanning6Acceptance %lanning


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Contents

IP PM v).0 Feature


2 eature %lanning

( Feature "e*o,$ent





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'eployment6-verall %rocedure

None

%age22


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'eployment6/ecution

ActivationInitia con'i&uration

%age2

"% %* can )eactivated )y

running an **Lcommand on theL*T or )y loading

the C*/coniguration ile

during sitedeployment.

"% %* activationusing an **L

command

&un the ACT IPPMcommand on &7CL*T to activate "% %* in the downlin>.

or the 7ode+, no coniguration isre


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'eployment6Ieriication

Feature activation veri'icationactivation o2servation Ater activating "% %*, you can )etwee

n the &7C and 7ode+ )y running **L commands, eecuting monitoring tas>s on

the L*T, or chec>ing counter values on the *2000.

Runnin& MM3 Co$$ands

&un the ollowing **L command to chec> the Jo; o the transmission networ>! -n the &7C L*T, run the "#P IPPMcommand.

-n the 7ode+ L*T, run the "#P IPPM#E##INcommand.

%age2


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E-ecutin& Monitorin& Tas%s on the 3MT

-n the L*T, chec> the Jo; o the transmission networ>.

-n the &7C L*T!

Log in to the &7C L*T and clic> the Monitorta).

"n Monitor Navi&ation Tree, choose MonitorK Co$$o

n Monitorin&K 3in% Per'or$ance Monitorin&.

"n the displayed 3in% Per'or$ance Monitorin&dialog )o

, choose IPPMrom the Monitor Ite$drop=down list )o

and choose a value rom the #u2rac% No.drop=down li

st )o. /nter a value in Adacent Node5 I"and IP Path

#,$2oand clic> #u2$it. The ollowing igure shows the

results o operations descri)ed in the preceding steps!

%age25

'eployment6-)servation

-n the 7ode+ L*T side!

Log in to the 7ode+ L*T and clic> the Maintenanceta).

Choose Reati$e #*eci'ic Monitorin&K I65 3in%

Fu- #tat Monitorin&.

"n the displayed I65 3in% Fu- #tat Monitorin&dialog

)o, choose IProm the Protoco T,*edrop=down

com)o )o and select the Incude IPPM #tatistic

chec> )o under Para$eter #ettin&. #nder IP

Para$eter, select the IPPAT1chec> )o and enter a

value in PATI".

The ollowing igure shows the results o operations

descri)ed in the preceding steps!


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Per'or$ance Measure$ent Mana&e$ent. "n the navigation tree, epand a node and select Measure$ents reated to Trans*ort a,er 3in% 7uni8i$a8'r

a8at$9under the node.

&ight=clic> Measure$ent Reated to IPPMand choose Active Measure$entrom the shortcut menu. -n thedisplayed Measure$ent #tatusta) page, select a management o)ect 8or eample, 1B.22.51.1(=3


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Choose Per'or$anceK /uer, Resut.

"n the displayed /uer, Resutdialog )o, select an "% path under Avaia2e 2ectson the 2ect #ettin&s

ta) page, and clic> ;and /uer,. The ollowing igure shows the results o operations descri)ed in this step!

%age2B



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Clic> the ther #ettin&sta), set items under Ti$e Mode, "ate Ran&e, Period, and #ortas re /uer,. The ollowing igure shows the results o operations descri)ed in this step!

%age2E


Clic> the Counter #ettin&sta), select the counter whose value

needs to )e ;.


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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. %age(0

Contents

IP PM v).0 Feature


2 eature %lanning

( eature 'eployment

4 Per'or$ance *ti$i


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7one



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Contents

IP PM v).0 Feature


2 eature %lanning

( eature 'eployment


: =M and Trou2eshootin&



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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. %age((

;tatus -)servation

;ee the description o eature activation veriication. Alarm

"% %* supports generation o the "% %* Activation ailure alarm and the "% %ath /cessive %ac>et Loss &ate alarm.

"% %* Activation ailure Alarm! " "% %* ails to )e activated, the initiator reports an "% %* Activation ailure alar

m. -n the &7C, the initiator reports an AL*=21(1 "% %* Activation ailure alarm@ on the 7ode+, the initiator rep

orts an AL*=2E00 "% %* Activation ailure alarm.

"% %ath /cessive %ac>et Loss &ate alarm! " "% %* detects that the pac>et loss rate o the networ> eceeds the

threshold, "% %* reports this alarm. -n the &7C, "% %* reports an AL*=21(2 "% %ath /cessive %ac>et Loss &

ate alarm@ on the 7ode+, "% %* reports an AL*=2BEB "% %ath /cessive %ac>et Loss &ate alarm.

"% %* 'eactivation

'eactivate "% %* when "% %* is not suita)le or the live networ>, the networ> does not need to )e m

onitored, or eceptions occur during "% %* measurement. To deactivate "% %*, perorm the ollowing

operations! &un the "EA IPPMcommand on the &7C L*T.

&un the RMV IPPM#E##INcommand on the 7ode+ L*T.

-peration and *aintenance


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7ode+ parameters

%arameter "' **L Command Ialue 'escription

;/;;"-7 7- A'' "%%*;/;;"-7 = "% %* session 7o.

%ATH"' A'' "%%*;/;;"-7 #" value range! 0 to 5(

Actual value range! 0 to 5(

#nit! none

'eault value! =

"% path 7o.

;/;;"-7 7- ';% "%%*;/;;"-7 = "% %* session 7o.

;/;;"-7 7- &*I "%%*;/;;"-7 = "% %* session 7o.

%L&AT ;/T %L&TH&/;H-L' #" value range! 0 to 100

Actual value range! 0 to 100

#nit! 'eault value! :0

Alarm generationthreshold

%L&'T ;/T %L&TH&/;H-L' #" value range! 0 to 100


#nit!

'eault value! 10

Alarm clearancethreshold

-peration and *aintenance6%arameters

and Counters

- ti d * i t % t


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&7C parameters

%arameter "' **L Command Ialue 'escriptionA7" ACT "%%* #" value range! 0 to EE

Actual value range! 0 to EE

#nit!

'eault value! =

Adacent node "'

%ATH"' ACT "%%* #" value range! 0 to 5(

Actual value range! 0 to 5(#nit! none

'eault value! =

"% path "'

";J-;%ATH ACT "%%* #" value range! G/;, 7-

Actual value range! G/;, 7-

#nit! none

'eault value! =

$hether the path is aJo; path

%H+ ACT "%%* #" value range! +/, A, /Actual value range!+/, A, /#nit! none

'eault value! =


and Counters

-peration and *aintenance %arameters


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&7C parameters


%*%&' ACT "%%* #" value range! 1 to 100


#nit! 100 ms

'eault value! 1

"% %*measurementperiod

L-;T%FT'/T/CT;$ ACT "%%* #" value range! -7, -

Actual value range! -7, -

#nit! none

'eault value! FF

;witch orcontrolling pac>et

loss detection

L-;T%FTALA&*TH' ACT "%%* #" value range! -/2M&1/28-CC#&!/=2, &/C-I/&G!1/=29,

-1/2M&/(8-CC#&!1/=2, &/C-I/&G!/=(9,

-/(M&1/(8-CC#&!/=(, &/C-I/&G!1/=(9,

-1/(M&/8-CC#&!1/=(, &/C-I/&G!/=9,-/M&1/8-CC#&!/=, &/C-I/&G!1/=9,-1/M&/8-CC#&!1/=, &/C-I/&G!/=9,-/M&1/8-CC#&!/=, &/C-I/&G!1/=9,

-1/M&/58-CC#&!1/=, &/C-I/&G!/=59,-/5M&1/58-CC#&!/=5, &/C-I/&G!1/=59

Actual value range!

-/2M&1/2, -1/2M&/(, -/(M&1/(,-1/(M&/, -/M&1/,-1/M&/, -/M&1/, -1/M&/5, -/5M&1/5

#nit! none

'eault value! :E)>R1E)

%ac>et loss alarmthreshold


and Counters



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&7C parameters


A7" ';% "%%* #" value range! 0 to EE


#nit! none

'eault value! =

Adacent node "'

%ATH"' ';% "%%* #" value range! 0 to 5(


#nit! none

'eault value! =

"% path "'

";J-;%ATH ';% "%%* #" value range! G/;, 7-

Actual value range! G/;, 7-

#nit! none

'eault value! =

$hether the path is aJo; path

A7" '/A "%%* #" value range! 0 to EE


#nit! none'eault value! =

Adacent node "'

%ATH"' '/A "%%* #" value range! 0 to 5(


#nit! none

'eault value! =

"% path "'


and Counters



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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. %age(B

Counters! real=time perormance monitoring

Counter 7ame Counter 'escription

"%%* &TT *ean delay 8ms9 *ean &TT delay

"%%* orward *ean itter ;ward *ean itter ;et receiving speed8pps9

*ean receiving rate o the peerend 8pps9

"%%* pac>ets sending num)er 7um)er o sent pac>ets

"% %* pac>ets loss num)er 7um)er o lost pac>ets


& &ate o "%%ATH 8pps9 %ac>et receiving rate

T &ate o "%%ATH 8pps9 %ac>et transmission rate

Average &TT 'elay o "%%ATH 8ms9 Average &TT delay

T %ac>et 'iscard &ate o

"%%ATH89

orward pac>et loss rate

T Time Nitter o "%%ATH 8ms9 orward delay variation

"%%* pac>ets sending num)er 7um)er o sent pac>ets

"% %* pac>ets loss num)er 7um)er o lost pac>ets

&7C counters 7ode+ counters


and Counters



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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. %age(E

Counters! traic measurement

&7C counters 7ode+ countersCounter 7ame Counter 'escription

I;."%%*.+its.*eansT*ean )it transmission rate o "% %* onthe "% path

I;."%%*.%>ts.*eansT*ean pac>et transmission rate o "% %*on the "% path

I;."%%*.%ea>.+its.&ateT*aimum )it transmission rate o "%%*

I;."%%*.%ea>.%>ts.&ateT*aimum pac>et transmission rate o"% %*

I;."%%*.%eer.+its.*eans& *ean peer )it receiving rate o "% %* onthe "% path

I;."%%*.%eer.%>ts.*eans&*ean peer pac>et receiving rate o "% %*on the "% path

I;."%%*.%eer.%ea>.+its.&ate&*aimum peer pac>et receiving rateo "% %*

I;."%%*.%eer.%ea>.%>ts.&ate&*aimum peer receiving rate o "%%* on the "% path

I;."%%*.orword.'rop*eans*ean orward pac>et loss rate o "% %*on the "% path

I;."%%*.orword.%ea>.'rop&ates*aimum orward pac>et loss rate o "%%* on the "% path

I;."%%*.orward.Nitter;tandard'eviation;tandard deviation o orward delayvariation o "% %* on the "% path

I;."%%*.+ac>.Nitter;tandard'eviation;tandard deviation o )ac>ward delayvariation o "% %* on the "% path

I;."%%*.&tt.*eans *ean &TT delay o "% %* on the "% path

I;."%%*.*a&tt'elay*aimum &TT delay o "% %* on the "%path


I;."%%*.+its.*eansT *ean )it transmission rate o "% %*

I;."%%*.%>ts.*eansT *ean pac>et transmission rate o"% %* 8pac>ets:second9

I;."%%*.%ea>.+its.&ateT %ea> )it transmission rate o "% %*

I;."%%*.%ea>.%>ts.&ateT %ea> pac>et transmission rate o "%%* 8pac>ets:second9

I;."%%*.%eer.+its.*eans& *ean peer )it receiving rate o "%

%*I;."%%*.%eer.%>ts.*eans& *ean peer pac>et receiving rate o

"% %* 8pac>ets:second9

I;."%%*.%eer.%ea>.+its.&ate& %ea> peer )i t receiving rate o "%%*

I;."%%*.%eer.%ea>.%>ts.&ate& %ea> peer pac>et receiving rate o"% %* 8pac>ets:second9

I;."%%*.orward.*eans.'rop&ates *ean orward pac>et loss rate o "%%* 81:100,0009

I;."%%*.orward.%ea>.'rop&ates %ea> orward pac>et loss rate o "%%* 81:100,0009

I;."%%*.orward.Nitter;tandard'eviation ;tandard deviation o orward delayvariation o "% %*

I;."%%*.+ac>.Nitter;tandard'eviation ;tandard deviation o )ac>warddelay variation o "% %*

I;."%%*.&tt.*eans *ean &TT delay o "% %*

I;."%%*.*a&tt'elay *aimum &TT delay o "% %*

I;."%%*.*in&tt'elay *inimum &TT delay o "% %*


and Counters


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" "% %* ails to )e activated, an "% %* activation ailure alarm is generated. -n the &7C, an AL*=21(1 "% %* Activation ailure alarm is gener

ated@ on the 7ode+, an AL*=2E00 "% %* Activation ailure alarm is ge

nerated.

&ectiy the ault )ased on alarm cause and alarm help inormation.

%age0

Trou)leshooting


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Contents

IP PM v).0 Feature


2 eature %lanning

( eature 'eployment



? Re'erences and Ter$s


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1. &A71.0 "% %* /nhanced eature %arameter 'escription

2. Common Transmission eature %arameter 'escription

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