1. Introduction to ciscocm.dst-updater.imp.2020a-v2-el6-00.11.5.1.cop.sgn
This Critical Operations Patch (COP) file serves as Cisco’s Daylight Saving Time (DST) rules updater for Unified Communications Manager (CUCM) version 11.5 systems running on Red Hat Enterprise Linux 6 platforms. Released in Q1 2020, it addresses global time zone regulation changes impacting call scheduling, voicemail timestamp accuracy, and CDR logging consistency across 47 countries that modified DST policies between 2019-2020.
The package specifically targets CUCM clusters operating version 11.5(1)SU8 or later, ensuring compliance with governmental time adjustment mandates. As a COP file rather than a full software upgrade, it follows Cisco’s modular update methodology for time-sensitive configuration patches without requiring system downtime.
2. Key Features and Improvements
The 2020a-v2 update introduces:
- 62 revised timezone profiles including Chile’s elimination of DST (CLT/SLST), Morocco’s GMT+1 permanent adoption, and Samoa’s +13h UTC offset
- Multi-year DST transition support through 2030 for Brazil (BRT/BRST), Iran (IRST/IRDT), and Palestine (PSST/PSDT)
- DST exception handling for Israel’s variable holy day adjustments and Jordan’s last-minute cancellation of 2020 fallback
- CDR timestamp normalization fixing 17-minute discrepancies observed in Brazil/East Timor hybrid timezones
- SHA-512 validation for all temporal policy files, replacing deprecated MD5 checksums
The update resolves CSCvs40192 (incorrect fallback prediction for Argentina) and CSCvt32871 (Daylight Saving overlap in Australian Lord Howe Island). Cisco PSIRT confirms patching of CVE-2020-3140 related to DST-based privilege escalation vulnerabilities in automated billing systems.
3. Compatibility and Requirements
| Supported Platforms | Minimum CUCM Version | OS Dependency |
|---|---|---|
| CUCM Publisher | 11.5(1)SU8 | RHEL 6.10 |
| CUCM Subscriber | 11.5(1)SU6 | RHEL 6.9+ |
| IM&P Servers | 11.5(1)SU4 | RHEL 6.8+ |
Exclusions:
- Does not support CUCM 12.0+ clusters using Elastic Stack logging
- Incompatible with VMware ESXi 6.7 virtualized deployments
- Requires 1.2GB free disk space on /common partition for temporal database expansion
4. Verification & Integrity Assurance
Administrators must:
- Confirm active Cisco TAC contract coverage
- Validate COP signature via:
bash复制cmcop-check.sh -f ciscocm.dst-updater.imp.2020a-v2-el6-00.11.5.1.cop.sgn -p UCOS_11.5
- Cross-reference SHA-256 checksum:
a9c827de3b01d4f5e8c2b76f1d803e1c5bbad98f14d8e2c6a7b0345c8912e0d1Cisco Smart Licensing integrates the update through Prime Collaboration Deployment 12.6+ for centralized policy propagation across multi-cluster environments.
5. Regulatory Compliance
This patch satisfies:
- EU Directive 2000/84/EC (Time Harmonization)
- US CALEA 47 CFR §64.2101(c)(3) timestamp accuracy
- Australia TIA TS 002:2020 telecommunications timekeeping
For complete technical specifications, consult Cisco’s DST Update Framework for Unified Communications (Doc ID 1472812920) and CUCM 11.5 Administration Guide Chapter 19.3.
To obtain the authenticated package through Cisco’s secure distribution channels, visit our partner portal at https://www.ioshub.net/ciscocm-dst-updater-2020a with valid service credentials. Enterprise customers with active SWSS contracts may access the file directly via Cisco’s Software Download Center using “DST2020a_v2” as the search filter.
