Section 13.3.1.3.3. Signaling Survivability with WAML Replacement

13.3.1.3.3. Signaling Survivability with WAML Replacement

For the feature “Signaling Survivability with WAML Replacement “ a common gateway board (HG 3500) must be configured in the AMO BFDAT using FUNCTION=WAML. Either a separate board or a board that supports multiple functions can be used for this purpose.

IMPORTANT:

If this feature is configured (STMI board with WAML function), then the redundant LAN interfaces function does not work. See also Section 6.4, “Redundant LAN Interface”.

Hardware:

STMI (HG 3500) with WAML functionality is used as a router. It must be configured in the host system in order to communicate with CCA/ CCB (within the same network).
S0 connection has to be configured.
Modem ISDN connected with V.24 (modem) at NCUI (HG 3575).

Figure 231. Signaling survivability withWAML replacement

The configuration consists of 3 parts:

1. IPDA

ADD-
SIPCO:NETADDR=172.28.145.0,NETMASK=255.255.255.0,IPMODE=IPV4,DEFRT=172.28.145.25
4,CCAADDR=172.28.145.150,CCBADDR=0.0.0.0,SURVNET=192.168.15.0;
ADD-UCSU:UNIT=AP,LTG=1,LTU=18,LTPARTNO=Q2305-X40,SRCGRP=1,FRMTYPE=L80XF,CONN
TYPE=APDL,LSRTADDR=172.28.145.155,APRTADDR=172.28.145.254,LOCID=012,LOCATION="IP
DA17WEAS",PLCHECK=YES,BCHLCNT=30,CONVLAW=NO,TCLASS=0,ALARMNO=0;
ADD-APRT:TYPE=APNET,LTU=18,APIPADDR=172.28.0.57,NETMASK=255.255.255.255,TAIPAD
DR=0.0.0.0;

/* HG3575 Configuration data

ip_addr_eth is	*	172.28.145.155
netmask_eth is	*	255.255.255.0
default_gateway is	*1	172.28.145.254
ip_addr_signaling is	*	172.28.0.57
netmask_signaling is	*	255.255.255.255
ip_addr_survivability is	*2	192.168.15.18
netmask_survivability is	*2	255.255.255.0
gateway_survivability is	*2	192.168.15.1
netmask_hhs is	*	255.255.255.0
ip_addr_CC_A is	*	172.28.145.150
ip_addr_CC_B is	*3	0.0.0.0
ip_addr_CC_C is		0.0.0.0

2. Signaling Survivability with WAML

/* WAML

ADD-BFDAT:FCTBLK=5,FUNCTION=WAML,BRDBCHL=BCHL60&BCHL120;

CHANGE-BFDAT:CONFIG=CONT,FCTBLK=5,FUNCTION=WAML,BCHLCNT=1;

CHANGE-BFDAT:CONFIG=OK,FCTBLK=5,ANSW=YES;
ADD-BCSU:MTYPE=IPGW,LTG=1,LTU=1,SLOT=85,PARTNO="Q2316-X10",FCTID=1,LW
VAR="0",FCTBLK=5,BCHLWAML=10;
ADD-CGWB:LTU=1,SLOT=85,SMODE=NORMAL,IPADR=172.28.145.156,NETMASK=255.255.255.0;

/* Direction to the router and call number of the router

ADD-BUEND:TGRP=111,NAME="WAML",NO=30;
ADD-COT:COTNO=222,PAR=ANS&LWNC&DFNN&NTON&NLCR&NLRD,INFO=FUER_WAML;
ADD-COP:COPNO=222,PAR=SFRM,TRK=TA,TOLL=TA,DEV=LAN,INFO=COP_FUER_WAML;
ADD-COSSU:NEWCOS=222,AVCE=TA&TNOTCR;
ADD-WABE:CD=446,DAR=TIE,CHECK=N;
ADD-TDCSU:OPT=NEW,PEN=1-1-85-0,COTNO=222,COP
NO=222,COS=222,LCOSV=1,LCOSD=1,CCT=WAMLREPLACED,DESTNO=0,PROTVAR=ECMAV2,SEG
MENT=8,NNO=1-1-318,TGRP=111,DEV=HG3550LA,BCHAN=1&&10;
ADD-RICHT:MODE=LRTENEW,LRTE=223,LSVC=ALL,NAME=WAML,TGRP=111,DNNO=1-1-118;
ADD-LODR:ODR=11,CMD=ECHO,FIELD=1;

ADD-LODR:ODR=11,CMD=END;

ADD-LODR:ODR=11;
ADD-LDAT:LROUTE=223,LSVC=ALL,LVAL=1,TGRP=111,ODR=11,LAUTH=1;
ADD-LDPLN:LCRCONF=LCRPATT,DIPLNUM=0,LDP=446,LROUTE=223,LAUTH=1;
/* IP address of the router (IP address of the physical router – WAML)
ADD-APRT:TYPE=SURV,CONF=ROUTER,ROUTERNO=1,LSADDR=172.28.145.156;
/* Assign access point to the survivability router
ADD-APRT:TYPE=SURV,CONF=AP,LTU=18,ROUTERNO=1;

3. WAML (HG 3500/STMI) configuration with WBM

WAML and LAN Redundancy

If WAML functionality is configured there is no LAN redundancy at all despite the configuration of the LAN2 active or not.

Therefore select during initial setup (Wizard > Initial Setup) Not configured or deactivated.

WAML replacement - Second LAN

Router Call Number

Configuration > Routing > PSTN > (right mouse click) Edit Global PSTN Data -> Router Call Number “446” as configured in AMO LDPLN.

Figure 232. WAML replacement - PSTN global data

You can check the result with Configuration > Routing > PSTN > Display Global PSTN Data.

PSTN Peer

The PSTN Peer (PSTN-Partner) is the survivability-modem with its IP-Address coming from AMO SIPCO, parameter SURVNET + access point number, here 192.165.15.18.

The PSTN-interface is the PPP side of the WAML, i.e. AMO SIPCO, parameter SURVNET + router number, here 192.168.15.1.

Configuration > Routing > PSTN > PSTN Partner > (1) WAML18

INFO:

Activate Short Hold and set the Short Hold Time to 180 seconds.

Figure 233. WAML replacement - PSTN peer

PSTN Station Number

With this number the WAML reaches the survivability modem. The number is configured on the S0 trunk with the extension 3277. Change Direction to Incoming and Outgoing.

Configuration > Routing > PSTN > PSTN Peers > (1) WAML18 > Add Station Number

Figure 234. WAML replacement - PSTN station number

You can check the result with Configuration > Routing > PSTN > PSTN Peers > WAML18 > Display Station Number.

Static Route

Destination is the signaling IP address of the HG 3575 (NCUI), as configured as APIPADDR in AMO APRT (172.28.0.57)

The Route Gateway is the ISDN IP address of the modem (AMO SIPCO, parameter SURVNET+AP no.): 192.168.15.18

The Destination Netmask must be set to 255.255.255.255 for tunneling. Therefore the netmask entry is hard coded to 255.255.255.255 and read-only for STMI boards with WAML function.

Configuration > Routing > IP-Routing > Static Routes> WAML18

Figure 235. WAML replacement - Static route

Save all the changes (disk icon) and reboot the board. Then the changes become effective.

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