9 owg500210 dual-homing principle and configuration(vmsc) issue1.0
TRANSCRIPT
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Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
ual!homing"rinciple and
Con#guration$%&'C(
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)e*erences
&'+T-000 ual!Homing /ser &anual
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+1ectives
/pon completion this course, you will eale to
/nderstand the asic concept o* dual!homing solution
"er*orm the data con#guration o* dual!homing %&'C
solution
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Contents
1. Dual-homing Concept
2. ual!homing "rinciple
. ata Con#guration
3. +peration and &aintenance
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)3 'o*t!'witch 'olution
Management system Service system Billing system SS7 network
MSC has been
separated into
MSC Server and
MGW
VoIP
MSC Server
MGW1 MGW n
IP backbone network
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)edundancy and 'ecurity
?MSC Server works as control plane, It
is very important to garantee the
redndancy and secrity on MSC
Server side!
MSC Server
MGW1 MGW n
IP bearer
?1.8 million subscribers
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The e#nition o* ual!homing
H is a networ4ing mode. 5n the "" )3 networ4ing and later, one
&7 is homed to two &'C 'ervers. 8ormally, an &7 registers with
the active &'C 'erver. 7hen the active &'C 'erver ecomes *aulty,the &7 registers with the standy &'C 'erver so that the
suscriers can still en1oy services.
ctive MSC Server ssistant MSC Server
MGWstan!byctive
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The e#nition o* ual!homing
The active &'C 'erver
The standy &'C 'erver we can also call it disaster recovery server, it is
used to ac4up the data and service *or the active server9 The virtual &'C 'erver the disaster recovery &'C 'erver is logically
partitioned into 8:; virtual &'C 'ervers. The virtual &'C 'ervers are
identi#ed according to 'erver inde
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Advantage o* ual!homing
5n H solution, one &7 is homed to two &'C 'ervers. 7hen the active &'C 'erver ecomes *aulty, the &7
registers with the standy &'C 'erver so that the suscriers can still en1oy services. 'o that we can say, it
improves the networ4=s reliaility.
7hen an active &'C 'erver is going to e moved or upgraded, you can manually trans*er its services to the
standy &'C 'erver. 5t improves the service=s continuity.
There is no special re>uirement *or other networ4 nodes and terminals.
"SS# "SS$ "SS% "SS&
'raditional networking mode
"SS# "SS$ "SS% "SS&
'he () networking mode
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i?erent H 'chemes
1+1 Active and Standby Mode
1+1 Assistant Mode
N+1 Assistant Mode
N+1 Active and Standby Mode
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ctive MSC Server1 Stan!by MSC Server#
MGW1 MGW# MGW" MGW&
H ;:; Active and 'tandy8etwor4ing &ode
;:;Active and 'tandy &ode 5n two &'C 'erver, one
o* them is active, the other is in the standy state.
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ctive MSC Server1 ctive MSC Server#
MGW1 MGW# MGW" MGW&
H ;:; Assistant &ode
;:; Assistant &ode 5n this mode, there are no di?erence o*
active server and standy server. @oth o* &'+T-000s are
active &'C 'ervers, and also assistant &'C 'ervers o* each other.
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Active MSC Server1 Standby MSC Server3
MGW3
Active MSC Server2
MGW2MGW1 MGW4
H 8:; Active and 'tandy&ode
8:; Active and 'tandy &ode 8 &'+T-000s wor4 as
active &'C 'ervers, the other one as the standy &'C 'erver.
+nly 8 server are active, the other ; server is always e
standy.
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8 8:; Assistant 8etwor4ing&ode
N+1 Assistant Mode 8 &'+T-000s wor4 asactive &'C 'ervers, the other one as the standy
&'C 'erver.
All the 8:; 'erver are active.
Active MSC Server1 Standby MSC Server3
MGW3
Active MSC Server2
MGW2MGW1 MGW4MGW5
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'ummary
ual!homing asic concept
The advantage o* ual!homing
The application o* the dual! homing networ4ing
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Contents
;. ual!homing Concept
2. Dual-homing Principle
. ata Con#guration
3. +peration and &aintenance
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ctive 'eactive
(ecovere!) switc*
$irtual MSC
Server%
$irtual MSC
Server1
bnormality) switc*
'eactive ctive
$irtual MSC Server1$irtual MSC
Server%
The &'C 'erver supports the *ollowing *our H switchmodesAuto switch9 &anual switch9 Auto ac4ward9 &anualac4ward.
The 'witch &ode o* ual!homing
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$irtual MSC Server%
Triggering Condition o* &anual 'witch &anually setting the H
status.Triggering Condition o* Auto 'witch Hearteat detection and
&7
registering re>uest.
@oth o* these two modes are in applied in the current networ4.
$MSC Server1 $irtual MSC Server%
$irtual MSC Server1
MSC Server1 MSC Server#
+'P *eartbeat
Triggering Condition o* H'witch
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'eactive
citve t*e!isaster recovery
server,s local
o--ice in-ormation
ctive
MGW an!
correlative
signaling
ctive BICC
MSC
Server%
$irtual MSC Server1
ctive
switc*
H %irtual &'C 'erver 'erviceTa4eover
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5mpacts o* H 'witching onCaller
MS SVR1 SVR2
' 1/1 ssistant sc*eme0t*e
rocess o- making a call
*MGW
MS is S$(1,s attac* subscriber. In normalcon!ition) it will initiate call rocess to S$(1.
BW*en t*e S$( is -aulty MGW will register toS$(#) c*ange t*e signaling route) sent call re2uest to
S$(#In S$(#,s $3() t*ere are no subscriber o- t*is MS.
So) it will return -ailure) t*e reason is 4absent subscriber56
DMS initiate 3+ rocess) t*en t*e call rocess cansuccess.
MS SVR1 SVR2
' 1/1 ctive an! Stan!by sc*eme0
t*e rocess o- making a call
*MGW
MS is S$(1,s attac* subscriber. In normalcon!ition) it will initiate call rocess to S$(1.
BW*en t*e S$( is -aulty )S$(# will receive t*eMS,s calling re2uest.
In S$(#,s $3() t*ere are no subscriber o- t*isMS. So) it will return -ailure) t*e reason is 4absent
subscriber56
DMS initiate 3+ rocess) t*en t*e call rocesscan success.
In the call process, all o+ the signaling and rote reelect are
completed by the MGW, it has no relationship with "SC-.C!
In the call process, all o+ the signaling and rote reelect are
completed by the MGW, it has no relationship with "SC-.C!
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5mpacts o* H 'witching onCallee
!
' 1/1 ssistant sc*eme
callee rocess
*e caller MS sen!s S(I re2uest to t*e3(6
B3( gets t*e MS( -rom t*e backuS$(1 in t*e S$(#6
In t*e $3( o- backu S$(#) t*ere are nosubscriber,s !ata. So) t*e S$(# will sen! !ata
recovery re2uest to t*e 3(6
D3( inserts subscriber,s !ata into t*ebacku $3( o- S$(#6
ES$(# will backu t*e P( (SP w*ic* isreturne! by t*e S$(1. *en t*e callee rocess
will continue.
FSP9SG *els to comlete t*is rocess.
PSTN/MSC SVR1 SVR2
*HLR
!
' /1 ctive an! Stan!by
sc*eme callee rocess
*e caller MS sen!s S(I re2uest to t*e3(6
BS$(# receives P( message -rom 3()3( nee!n,t to c*ange t*e route
arit*metic:S$(# uses t*e same signaling oint;6
In t*e $3( o- backu S$(#) t*ere are nosubscriber,s !ata. So) t*e S$(# will sen! !ata
recovery re2uest to t*e 3(6
D3( inserts subscriber,s !ata into t*eS$(#6
ES$(# return P( (SP) t*e callee rocesswill continue.
FSP9SG *els to comlete t*e re0
!irectional an! backu rocess.
PSTN/MSC SVR1 SVR2
*HLR
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5mpacts o* H on Calling and@illing
5mpact on calling uring the H switching, &7 will change the registered 'erver. The
resource will e provided y this &7. All calls, eing processed y the
original active &'C 'erver, will e interrupted. The &7 reclaims all
resources9
uring the H switching or ac4ward, the &'C 'erver, which will ta4e
over services, initiate reset to the trun4 group. Then, terminals
$including callers and callees( will e released .
5mpact on @illing
uring the H switching, ills will e lost ecause they wouldn=t e
generated y the original &'C 'erver in time,.
A*ter switching, ills are generated on the i7@ o* an current activated
&'C 'erver. The illing center connect the current i7@ to get ills.
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'ummary
H switching modes and its triggering condition
H switching impact on calling and illing
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Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
Contents
;. ual!homing Concept
2. ual!homing "rinciple
". Data Con#guration
3. +peration and &aintenance
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Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
Contents
ata Con#guration
".1 Dedicated Data o$ D%
.2 5nternal ata Con#guration
. 5nterconnection ata Con#guration
.3 'ervice ata
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edicated ata Con#guration'teps
5* &'itch modeo* a virtual 'erver node in the localoGce is set to Automatic, con#guration steps are as
*ollowing
'tep ; /se the command 'T H7& to set 7or4 mode o*
virtual 'erver node 0 to Assistant, 'witch mode to &anual, and
orce state to Activated.
'tep 2 /se the command A ')%8+ to set the assistant
&'+T-000 o* a local one $*or e
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'et H 7or4ing &ode
&() D%*M *or mode, a parameter, is used to de#ne the wor4
mode o* a local oGce in a networ4. Iou can use the
command 'T H7& to set 7or4 mode to 'tandalone or
Assistant.
'tandalone indicates the local &'+T-000 does not wor4 in Hmode.
Assistant indicates the local &'+T-000 wor4s in the H mode.
5t is only valid when 7or4 mode is set to Assistant. 5t
de#nes the switch mode o* a certain virtual 'erver node
in the local oGce.
5t is valid when &'itch modeis set to Automatic. 5t
de#nes the ta4eover mode when a certain local virtual
'erver node is switched over automatically. The system
supports all the modes.
Handsha4e timeout $JKs(
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'etting H %irtual 'erver 8ode ADD &,ND(
5n the tale o* virtual 'erver nodes, item 0 is always con#gured *or
a local &'C 'erver, while other items are con#gured *or assistant or
standy &'C 'ervers.
@e*ore adding a virtual 'erver node in the &'C 'erver, set 7or4
mode o* the virtual 'erver node 0 to Assistant with the command
'T H7& to activate the dualhoming *unction o* the local oGce.
in!e< server
0 S=0
1 S=01
# S=0#
... ...n S=0n
in!e< server
% S=01
1 S=0
in!e< server
% S=0#
1 S=0
in!e< server
% S=0n
1 S=0
S=01
S=0#
S=0n
......S=0
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'etting Local "ort o* HHearteat Lin4 $+ptional( &() D%/CP,)N
'ignals o* H hearteat lin4 are transmitted
through the /" protocol9
@y de*ault, the /" port numer used y thehearteat lin4 o* the local &'+T-000 is ;000.
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'etting H Hearteat Lin4
ADD D%%C0 Considering sa*ety, con#gure two hearteat lin4s
i* the system has two pairs o* 75&s or more.
(ncrption method 5t speci#es whether the
hearteat signals needs encrypting or not. Thede*ault type is M&KN.
3e4 5t speci#es the 4ey re>uired y the &K
encryption algorithm. The value should e a
character string o* at most ;6 characters.
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Contents
ata Con#guration
.; edicated ata o* H
".2 5nternal Data Con#guration
. 5nterconnection ata Con#guration
.3 'ervice ata
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Local
ata The local data is used to de#ne
'ignaling point code, Country code and area code,
8ational toll area code, &ulti!area statistics inde
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Local ata ADD MA&5
Add &ulti!area statistics inde
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Contents
ata Con#guration
.; edicated ata o* H
.2 5nternal ata Con#guration
"." 5nterconnection Data Con#guration
.3 'ervice ata
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&c 5nter*ace ata *orConnecting to &7
ADD M* The data *or connecting to the &7 is an interconnection
data o* the &'+T-000. 5t de#nes the *ollowing
in*ormation
The data o* H.23P lin4s etween the &'+T-000 and the
&7
The &edia connection relationship etween &7s
The in*ormation o* paths etween &7s
The parameter &7 inde< $A &7( is directly
associated with the inde< o* virtual 'erver nodes and
determines the virtual 'erver node to which the &7s
elong.
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ata Con#guration o* &c Lin4
ote>
;. The direction o* arrowhead means CL58T to ')%). or '-;, /&; ismaster,
and /&2 is standy.2. '-; and '-2 are ac4up. ollow the load!share principle to select the 7@'.
1 1
BSG1
2
SX1 SX2
+MG1 +MG#
BSG2 BSG3 BSG1 BSG2 BSG3
PPU1 PPU2 PPU3 PPU1 PPU2 PPU3
11 1 2 2 2 2
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'ignaling 5nter*ace ata
5* a local '" related to the &T" '" elongs to virtual
'erver node 0, the &T" '" and suse>uent data to e
con#gured are also in charge o* virtual 'erver node 0.
Con#guration procedure o* the &2/A!ased &T" are as
*ollowing
Con#gure active 8Q'", 8QLR', 8Q)T and 8QL8R *or virtual &'C
'erver node 0.
Con#gure standy 8Q'", 8QLR', 8Q)T and 8QL8R *or other virtual
&'C 'erver nodes.
ollow the load!share principle to select the 7@'.
MP Con-igurationMP Con-iguration
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'ignaling 5nter*ace ata
The Homing 'erver o* &2/A lin4 sets and lin4s are determined
y '.
5* the ' is homed to virtual 'erver node 0, the lin4 sets and
lin4s o* &2/A are in charge o* virtual 'erver node 0. "roceed as
*ollows to implement the &2/A con#guration
Con#gure active ', &2/A lin4 sets and lin4s *or virtual 'erver node 0.
Con#gure standy ' and &2/A lin4s and lin4 sets *or other virtual 'erver
nodes.
Con#gure one &2/A lin4 set *or the &7 $emedded '(. The lin4 set
contains two lin4s, one o* which is connected to an active &'C 'erver and the
other is connected to a standy &'C 'erver.
Con#gure an &2/A lin4 on the &7 $emedded '(. Then the &2/A lin4 set
ma4es the lin4 e managed y the virtual 'erver node that manages itsel*.
M#+ Con-igurationM#+ Con-iguration
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'ignaling 5nter*ace ata
The Homing 'erver o* &/A con#guration $&,
&LR', &)T and &L8R( are determined y local '".
5* local '" node 0 is speci#ed *or &L, the con#guration
o* its suse>uent data is in the charge o* local '" node
0.
"roceed as *ollows to implement the &/A
con#guration
Con#gure active &/A local entities, destination entities, lin4 sets,
routes and lin4s *or virtual 'erver node 0.
Con#gure standy &/A local entities, destination entities, lin4
sets, routes and lin4s *or other virtual 'erver nodes.
ollow the share!ali4e principle to select the 7@' module on the
&'+T-000 and try to ma4e all 7@'s share services o* one '.
M"+ Con-igurationM"+ Con-iguration
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ctive MSC Server 'isaster recovery MSC Server
Master
?PC>Mster ?PC>B
Slave ?PC>
MGW9SG
Master linkStan!by lonk
?PC>C
(irection o+ link
set is /01C
(irection o+ link
set is C01/
(irection o+ link set
is /01C, when the
master link is active,
the slave link is de0
active
H 'ignaling Con#guration!Lin4 "riority Level
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Master MSC Server 'isaster recovery MSC Server
Master
?PC>
Master
?PC>B
Slave ?PC>
MGW9SG
?PC>C
(irection o+
rote is /01C
'hrogh rote
direction is C01/bypass rote
direction is C01"01/
(irection o+ rote is
"01Cmaster 2PC
and the slave 2PC is
standby signaling
point relationship
H 'ignaling Con#guration!)oute "riority Level
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/in Priorit ,oute Priorit
/in a6aila7ilit5n T& networ4, hal* o*
lin4s can=t e used
High Lin4
availaility
&'itch time delaActive and de!activelin4 switch to each
other, time delay e
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'ummary Local in*ormation associate with virtual node inde< directly9
58+&'C associate with its virtual node y the corresponding
relationship with the +5.
&A'5 in*ormation manage virtual node inde< directly. 5t con#rm which
virtual node that &'C in multi!area elong to.
&7 associate with the virtual node inde< directly. The &CL8R associatewith the virtual node y the &7 it elongs to.
@'C, )8C and LA5SA5 and so on associate with the virtual node y the
local in*ormation that +"C elong to.
5'/", T/", ")A, )2 oGce direction associate its virtual node y the media
gateway that trun4 group elong to. @5CC oGce direction associate with the virtual node y the @5CC'CT"L8R.
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Contents
ata Con#guration.; edicated ata o* H
.2 5nternal ata Con#guration
. 5nterconnection ata Con#guration
".9 &er6ice Data
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H &oility &anagement
very virtual &'C 'erver has its own moility data, such as )8C,
@'C, LA5SC5. 'o a*ter the H switch, i* the &'C 'erver=s signaling
su system can e active, then the update location in virtual &'C'erverS%L) can completed success*ully. or e
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Pa e46Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
L/!@etween %irtual 8odes in+ne &'C 'erver
#.+!ate3ocation :MSC#)$3(#;
@.InsertSub'ata
A.InsertSub'ata(es
&.Cancel3ocation(es
".Cancel3ocation
7.+!ate3ocation(es
:3(;
MSC$V3-$3/I$ )3-MSC#V3-#3/I#
1.3ocation +!ate (e2
:ol! 3I 3I1)new 3I 3I#;
8.3ocation +!ate cc
MS
%L) initiates the location update to the HL) to in*orm the HL) the
suscrier=s location. 5t can use necessary method $inside
implement(, so to avoid the conOict etween the Oow o* insert data
and delete data9 The data con#guration 1ust li4e in normal situation.
The inside implement is used to adapt the change o* H switch.
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Pa e47Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
H ata )ecovery and "aging
#.(estore 'ata
1.Provi!e(oamingbr MSC#
".(estore'ata(es
A.Paging :3I in MSC area;
&.Provi!e(oamingbr(es
MSC$V3-$3/I$ )3- "SC
@.IM
7hen the suscriers ma4e the #rst call a*ter the H
switching without location updating. To the caller service, i*it #nd there are no suscrier data, or the caller service
route to the new &'C ut #nd no suscrier, then the
recovery Oow will e triggered.
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Pa e48Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
H Handover low
5ntra!oGce handover data The handover etween locationareas in a same virtual 'erver node is the intra!oGce
handover. The data con#guration is the same as that in
common cases. The handover *rom LA5!; to LA5!2 or LA5!
are all intra!oGce handover.
5nter!oGce handover data etween di?erent virtual 'erver
node A location area whose local oGce is con#gured with a
virtual 'erver node will e con#gured as a local %L) location
area cellSservice area. The LA5!,LA5!3 are local %L)=s
service area. @ut their virtual node is di?erent. 'o, the
switch *rom LA5! to LA5!3 is intra!oGce handover.
5nter!oGce handover data etween di?erent &'C 'ervers is
same as common data.
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Pa e49Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
Virtal Server# "SC
;."repareHandover)e> &'C,C5
3. "repareHandover)es
VirtalServer$V3-$3/I$
K.5A& H+8
Lin4 to &'C 8umer y C5, andallocating the handover numersaccording to this
&'C 8umer.
2.Handover)e> $C5(
.Handover)e>Ac4
A*ter the H 'witching, the handover etween two virtual 'erver is inter!&'C
handover.
5n A LA5C5SLA5'A5 the type o* LA5 in to!e!ta4en!over virtual node
should e con#gured as local %L) LA5.
Handover "rocedure andCon#guration A*ter 'witching
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Pa e50Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
H Trun4 +Gce irection'cheme A inter*aceS5'/"ST/"S)2S")AS@5CC oGce
direction, su route, route, route analysis,
trun4 group, circuit data are con#gured same
as common data.
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Pa e51Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
H=s 8umer Analysis and)outing unctionActive MSC Server Standby MSC Server
MGW1
Active in!
%e$active in!
MGW2
"A#$5"A#$2 "A#$4
"A#$1
The caller &' elongs to &7;, the called &' elongs to the &72. A*ter
H switching, the &7; and the &72 are also intra!oGce circuit. 'o, it is
impossile to estalish mesne earing. The call can not e separated in
logic. @e*ore H, it is intra!oGce call, i* we don=t di?erentiate di?erent
virtual node=s roaming numer pre#
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Pa e52Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
H )oaming 8umer andHandover 8umer Assignment
get MSC umber -rom
+serIn-o In $'B
:1;
Msc umber MS(9? Su--i< I'
MSC an! MS(9? maing relation able
8A1"%7@@%% %
8A1"%7@@%1 1
......
:#;
I' MS(9? Pre-i