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Cisco Bug: CSCus86850 - 17.2/18.0 SGSN - S3 - 3G TO 4G SRNS not working fails at fwd rel cmp ack

Last Modified

Dec 26, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

17.2.0.58937 18.0.0.58964

Description (partial)

Symptom:
3g to 4g srns handover on s3 interface fails.
MME sends fwd relocation complete after handover completion but sgsn is not responding with a ack message and sends iu relase with relocation cancelled after timer expiry.

After which it responds with fwd reloc ack with cause "context not found".
This is seen at one call level.
This is a regression issue. last working build:58821.
All s3 call-models with srns handover/csfb/srvcc are blocked. This is qa-blocking and release blocking for s3 call-models

Conditions:
3g to 4g srns handover on s3 interface fails.
MME sends fwd relocation complete after handover completion but sgsn is not responding with a ack message and sends iu relase with relocation cancelled after timer expiry.

After which it responds with fwd reloc ack with cause "context not found".
This is seen at one call level.
This is a regression issue. last working build:58821.
All s3 call-models with srns handover/csfb/srvcc are blocked. This is qa-blocking and release blocking for s3 call-models
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