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Bug #3356

open

OsmoSGSN doesn't provide unique IDTAG_SERNR in IPA CCM

Added by laforge almost 6 years ago. Updated almost 5 years ago.

Status:
In Progress
Priority:
Normal
Assignee:
Category:
GSUP interface
Target version:
-
Start date:
06/23/2018
Due date:
% Done:

0%

Spec Reference:

Description

OsmoSGSN currently identifies itself simply as "SGSN" over the IPA/GSUP link to OsmoHLR.

This is wrong as it results in all OsmoSGSNs (in a multi-SGSN network) to register using the same identity, which in turn will render the HLR unable to store which SGSN is actually serving the subscriber, and/or to route messages accordingly.

It appears the change to "SGSN" was made in Change-Id: I0a60681ab4a4d73e26fe8f0637447db4b6fe6eb2 from "SGSN-00-00-00-00-00-00" before. Both the old and the new name are wrong though, as they're not unique.

The correct behavior AFAICT is "SGSN-" prefix with whatever unique identifier behind. We could make that suffix configurable in the VTY, if there's no other way to derive any other locally unique identifier. MAC addresses work fine for BTSs, but not for SGSNs: There might be any number of OsmoSGSNs running on the same physical / virtual machine with only one MAC address...


Related issues

Related to OsmoMSC - Bug #3355: OsmoMSC doesn't provide unique IDTAG_SERNR in IPA CCMResolvedstsp06/23/2018

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Related to OsmoHLR - Bug #2796: OsmoHLR doesn't update VLR during UpdateLocationResolvedneels12/30/2017

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Related to OsmoHLR - Feature #3644: allow arbitrary bytes in Global Title (GT), a.k.a. the VLR,SGSN's identification towards the HLRNewneels10/11/2018

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