These release notes are now part of the Cumulus Linux User Guide. But, don't worry, we will continue to keep this page up-to-date until the release is no longer available.
These release notes support the Cumulus Linux 4.0.0 release and describe currently available features and known issues.
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What's New in Cumulus Linux 4.0
Cumulus Linux 4.0.0 contains the following new platforms, new features, and enhancements:
New platforms include:
- EdgeCore Minipack AS8000 (100G Tomahawk3)
- Mellanox SN3700C (100G Spectrum-2)
- Mellanox SN3700 (200G Spectrum-2): Cumulus Linux 4.0.0 currently supports 100G speed
- HPE SN2745M (100G Spectrum)
New features and enhancements include:
- The Cumulus Linux operating system is now based on Debian Buster (version 10) with a 4.19 kernel.
- Capability to
apt-get upgradeto a specific 4.x.y release, not just the latest (for use in future Cumulus 4.0.x releases)
- EVPN BUM traffic handling using PIM-SM on Broadcom switches
- PIM active-active with MLAG
- Port security on Broadcom switches
- What Just Happened (WJH) for Mellanox switches to stream detailed and contextual telemetry for off-box analysis with tools such as NetQ
- New backup and restore utility
- Advertise Primary IP Address for type-5 routes in EVPN symmetric deployments (VXLAN active-active mode)
- BGP best path reason shown in command outputs
- The following default settings have changed:
For complete details on the differences between Cumulus Linux 4.0 and Cumulus Linux 3.7, refer to this article.
Cumulus Linux 4.0.0 supports a limited number of platforms. For the current list, see this article.
Cumulus Networks is ending the sale of these platforms in Cumulus Linux 4.0:
- Cumulus Express CX-10256-S/EdgeCore OMP-800 (100G Tomahawk)
- Dell S6000-ON (40G Trident2)
- EdgeCore Wedge-100 (100G Tomahawk)
- Facebook Backpack (100G Tomahawk)
Cumulus Networks is ending support for the Facebook Voyager (100G Tomahawk) switch in Cumulus Linux 4.0.
Important: Do not install Cumulus Linux 4.0 on the platforms that are listed as end of sale or end of support; Cumulus Linux does not work correctly on these platforms.
Cumulus Linux is licensed on a per-instance basis. Each network system is fully operational, enabling any capability to be utilized on the switch with the exception of forwarding on switch panel ports. Only eth0 and console ports are activated on an un-licensed instance of Cumulus Linux. Enabling front panel ports requires a license.
After you receive a license key from Cumulus Networks or an authorized reseller, you can install the license. Follow the steps in the Cumulus Linux Quick Start Guide.
Install or Upgrade to Version 4.0
Whether you are installing Cumulus Linux 4.0 for the first time or upgrading from an earlier version, follow the steps in the Installation Management section of the Cumulus Linux User Guide.
Perl, Python and BDB Modules
Any Perl scripts that use the
DB_File module or Python scripts that use the
bsddb module do not run under Cumulus Linux 4.0.
You can read the technical documentation here.
Open and Fixed Issues in Cumulus Linux 4.0
|November 19, 2019||4.0.0 release|
|November 21, 2019||Added CM-27367|
|November 25, 2019||Added CM-27184|
|December 16, 2019||Added CM-24993|
|December 20, 2019||Added CM-27719, CM-27699, CM-27678, CM-27619, CM-27422, CM-27275|
|January 7, 2020||Added CM-27801|
|January 9, 2020||Added CM-27740|
|January 10, 2020||Added CM-27753|
|January 10, 2020||Added CM-26815 (fixed issue)|
|January 27, 2020||Added CM-27295|
|January 28, 2020||Added CM-28087, CM-28077, CM-28065, CM-27496|
|January 29, 2020||Added CM-28156 and CM-27299|
|January 30, 2020||Added CM-28119, CM-28076, CM-27999, CM-27957|
|January 31, 2020||Added CM-28191|
|February 5, 2020||Added CM-28226|
|March 2, 2020||Added CM-27586|