PGW and AS5400 SS7 Interconnect PROBLEM

Unanswered Question
Mar 12th, 2008
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Hi everyone,


I desperately need your help! I am trying to enable dialup internet access termination on AS5400 using SS7 connection to telco switch via PGW v9.6.1. and integrated SLT. I am having trouble configuring the RLM control link between PGW and AS5400. PGW does not sent any rlm packets to as5400.


Here is the AS5400 config:

!

controller E1 6/0

framing NO-CRC4

channel-group 15 timeslots 16

pri-group timeslots 1-15,17-31 nfas_d primary nfas_int 0 nfas_group 0 rlm-group 0

!

interface Serial6/0:15

no ip address

encapsulation ss7

channel-id 0

!

interface Dchannel6/0

no ip address

encapsulation ppp

dialer rotary-group 0

dialer-group 1

no snmp trap link-status

isdn incoming-voice modem

!

rlm group 0

protocol rlm port 3001

server pgw

link address 10.10.2.10 source Loopback0 weight 1

!

ss7 set session-set 0 failover-timer 3

ss7 session 0 address 10.10.2.10 8061 10.10.1.220 8061 session-set 0

!


Here is PGW config

+++

prov-add:IPROUTE:NAME="iproute-2",DESC="AS5400",DEST="10.10.1.220",NETMASK="255.255.255.255",NEXTHOP="10.10.2.14",IPADDR="IP_Addr1",PRI=1

prov-add:OPC:NAME="opc-1",DESC="OPC",NETADDR="2.10.3",NETIND=2,TYPE="TRUEOPC"

prov-add:DPC:NAME="dpc-1",DESC="Point Code",NETADDR="1.9.0",NETIND=2

prov-add:SS7PATH:NAME="ss7p-1",DESC="SS7 Signaling Service",MDO="Q767_RUSS",CUSTGRPID="0001",SIDE="network",DPC="dpc-1",OPC="opc-1",M3UAKEY="",ORIGLABEL="",TERMLABEL=""

prov-add:EXTNODE:NAME="as17-5",DESC="AS17-5 Gateway",TYPE="AS5400",ISDNSIGTYPE="N/A",GROUP=0

prov-add:SESSIONSET:NAME="sessionset-1",EXTNODE="as17-5",IPADDR1="IP_Addr1",PEERADDR1="10.10.1.220",PORT=8061,PEERPORT=8061,TYPE="BSMV0"

prov-add:LNKSET:NAME="lnkset-1",DESC="Lnkset",APC="dpc-1",PROTO="SS7-ITU",TYPE="IP"

prov-add:SS7ROUTE:NAME="ss7r-1",DESC="SS7 Route",OPC="opc-1",DPC="dpc-1",LNKSET="lnkset-1",PRI=1

prov-add:NASPATH:NAME="signas-1",DESC="Naspath signaling service",EXTNODE="as17-5",MDO="BELL_1268_C2",CUSTGRPID="0000",SIGSLOT=0,SIGPORT=0

prov-add:C7IPLNK:NAME="c7ip-1",DESC="C7Iplink",LNKSET="lnkset-1",SLC=0,PRI=1,TIMESLOT=0,SESSIONSET="sessionset-1"

prov-add:IPLNK:NAME="iplnk-2",DESC="Iplnk to AS5400",SVC="signas-1",IPADDR="IP_Addr1",PORT=3001,PEERADDR="10.10.1.220",PEERPORT=3001,PRI=1,IPROUTE="iproute-2"

+++


The problem is that IP link to as5400 is not coming in-service and as a result the associated naspath control link is not coming up.


AS5400#sh rlm group 0

RLM Group 0 Status

User/Port: RLM_MGR/3001 ISDN/3002 RLM Version : 2

Link State: Down Last Link Status Reported: None

Next tx TID: 0 Last rx TID: 0

Server Link Group[pgw]: Last Reported Priority: UNKNOWN

link [10.10.1.220(Loopback0), 10.10.2.10] = socket[opening]


…skipped…

RLM Group 0 Statistics

…

Server Link Group[pgw]:

Open the link [10.10.1.220(Loopback0), 10.10.2.10]:

last time occurred at Mar 12 10:46:42.564, success=0(0%), failure=8879

avg=0.000s, max=0.000s, min=0.000s, latest=0.000s

Echo over link [10.10.1.220(Loopback0), 10.10.2.10]:

last time occurred at Mar 12 10:47:18.565, success=0(0%), failure=541541

avg=0.000s, max=0.000s, min=0.000s, latest=0.000s



pgw mml> rtrv-alms:


MGC-01 - Media Gateway Controller 2008-03-12 10:50:06.280 EET

M RTRV

"iplnk-2: 2008-03-10 22:24:28.080 EET,ALM=\"SC FAIL\",SEV=MJ"

"signas-1: 2008-03-10 22:24:28.080 EET,ALM=\"FAIL\",SEV=MJ"

;


The strange thing is that I can't set IP Link IN-SERVICE:


pgw mml> set-iplnk:iplnk-2:


IS

OOS

FOOS

INH

UNH

confirm

<cr>

pgw mml> set-iplnk:iplnk-2:IS


MGC-01 - Media Gateway Controller 2008-03-12 10:50:49.151 EET

M DENY


IITA /* Input, Invalid Target */

;


pgw mml> rtrv-iplnk:all:


MGC-01 - Media Gateway Controller 2008-03-12 10:54:21.501 EET

M RTRV

"iplnk-2:OOS"

"sessionset-1-1:IS"

;

pgw mml> rtrv-iproute:all:


MGC-01 - Media Gateway Controller 2008-03-12 10:54:39.700 EET

M RTRV

"iproute-2:IS"

/* Route to AS5400 */

;

pgw mml>


The packet trace shows that PGW is NOT sending any rlm packets to AS5400.


PLEASE HELP!

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j.bien Mon, 04/14/2008 - 01:45
User Badges:

hi, you might wanna change the rlm port on the gateway to use 3000 instead of 3001.


3000 - gateway

3001 - pgw


hope this helps.

siarhei Wed, 04/16/2008 - 22:38
User Badges:

Thanks for your suggestion but it didn't help. Finally, I had to change the config to use IUA instead RLM for gateway-to-pgw SS7 connectivity and it worked like a charm. Very strange that RLM didn't work despite the correct config...

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