Dialogic DSI SS7MD Bedienungsanleitung PDF herunterladen (Seite 146)

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Chapter 7 Configuration Overview

On Signaling Gateway 2, configure the signaling links as follows:

C7SLI:C7LINK=1,EQU=1-1,TS=1-1-1,LS=1,SLC=1;

C7SLI:C7LINK=2,SNLINK=1,LS=2,SLC=0;

On Signaling Gateway 2, configure the SS7 routes as follows:

C7RTI:C7RT=1,DPC=1,LS1=1,LS2=2,NC=1,LABEL=SEP1;

C7RTI:C7RT=2,LS1=2,DPC=2,NC=1,LABEL=INTERLINK;

Linkset 1 is configured for both Signaling Gateways and has a destination point code of the SS7 switch.

Linkset 2 is a special linkset that has the same OPC and DPC. It is used to route messages destined for CICs

on the partner Signaling Gateway.

C7 route 1 is used to route calls from the Signaling Gateways to the SS7 switch, if LS1 is not available, the

signaling is routed via the partner Signaling Gateway using LS2. This is the C7 route assigned to circuit

groups.

7.6.3 Multihoming

An inherent property of the SCTP layer on the Signaling Gateway that is used in SIGTRAN Signaling (for

example, SS7 over M2PA) is that it supports IP multihoming. IP multihoming allows the SIGTRAN signaling

link SCTP association to be configured to communicate with multiple IP addresses in an active/standby

relationship. Multihoming offers a SIGTRAN signaling link significantly greater resilience since the link can be

configured with multiple IP addresses to operate over separate Ethernet ports within wholly separate IP

networks. IP ports and local IP addresses on the Signaling Gateway may be configured using the IPEPS

command (see page 86). SIGTRAN links may be configured to communicate with multiple remote IP

addresses using the SNSLI command (see page 119).

7.7 Hard Disk Management

7.7.1 SS7G21 and SS7G22 Hard Disk Drives

Backup and restoration of the SS7G2x environment can be used in conjunction with the spare hard drive to

restore a system to full operation in the event of hard disk failure. A backup may also be useful to take a

snapshot of a known working system prior to significant change, or for diagnostics purposes providing files to

the support channel for further investigation in the event of problems occurring on their system.

For more information about backing up SS7G2x hard drives, see Section 4.14, “Creating a System Archive”

on page 35.

Note: The SS7G2x spare hard disk, SS7G20SHDD, is an orderable product containing the operating

system for the SS7G2x. The SS7G20SHDD is system neutral and requires a backed-up system

license to bind it to a particular SS7G2x. The SS7G20SHDD will not function without a valid

system license. If you want to take up the additional redundancy offered by a spare hard disk

you must ensure that you have an archive of at least the system license prior to any potential

failure of a hard disk.

7.7.2 SS7G31 and SS7G32 Hard Disk Drive RAID Array

The SS7G31 and SS7G32 systems are equipped with 2 mirrored hard disk drives configured in RAID 1 array

(Redundant Array of Independent Disks). These disks will remain synchronized, ensuring that an up-to-date

copy of all data on the disk drives (such as the operating system software, Dialogic

DSI signaling software,

system licenses and configuration files) will be maintained on both disks. In the event of failure of a single

drive, the Signaling Server will continue to support all the capabilities of the Signaling Server. When the

failed disk drive is replaced with a unformatted disk drive, following the procedure below, the Signaling

Server will mirror the operating software and data onto the new drive.

In the event of hard disk failure, the system will alarm, identifying the disk as unavailable. On the SS7G31

systems, the disk drive must be deactivated using the MNINI command (see Section 6.9.3 on page 94)

before the unit is shut down, and the hard drive removed and replaced. For the SS7G32 the disk drive must

be deactivated but the unit does not require to be shut down.

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