Skylight Flex 100 Release Notes 22.01.5
  • 05 Feb 2024
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Skylight Flex 100 Release Notes 22.01.5

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Article Summary


Accedian is pleased to announce the 22.01.5 GA release of Skylight Flex 100. This software runs on the 100G platform.

Product NameSoftware VersionBuild NumberSoftware Files
Skylight Flex 10022.01.5 GA1995


The following components have been tested:

  • uBoot version 160
  • CPLD version 317
  • Skylight orchestrator 23.04 (GA 10)
  • RR Standalone version 0.456.18, Shipper 0.20.0
  • roadrunner_sal_bundle_0.32.11
  • RoadRunner Connected version 0.456.19
  • Skylight Analytics 23.04.137 (aod-deployer 11.175.138)

CAUTION: A potential security vulnerability has been identified in version 22.01. If you are upgrading from Skylight Flex 100 software version 22.01, please contact Accedian TAC to apply the corrective measures.

The following topics are covered in this article:

  • New Features
    Learn more about Skylight Flex 100’s new features.

  • Supported Features
    Covers Skylight Flex 100’s supported features.

  • Support in Release 22.01.5
    Details the support for scalability and transceivers.

  • Operational Considerations
    Lists the operational considerations for Skylight Flex 100.

  • Addressed Issues
    Lists the corrected issues in this release.

  • Skylight Flex 100 Release 22.01.5 Lifecycle
    Details the life cycle for this release.

For more information, such as the initial configuration guidelines and upgrade procedure, see Getting Started.

New Features

Skylight Flex 100 release 22.01.5 introduces the following new features and enhancements.

Zero Touch Provisioning Enhancements

Zero Touch Provisioning beacon support in QinQ scenario has been added to Skylight Flex 100. When receiving the beacon, the beacon has two VLAN tags; these tags are used to create the management interface.

Supported dual VLAN permutations include:


Furthermore, you can change the ZTP auto interface to a ZTP static interface via in-band management.

Maximum Transmission Unit Enhancement

The system will not have dependencies to shutting down ports in order to apply maximum transmission unit (MTU) modifications.

The dependency of port shutdown for other parameters, except MTU size, persists.

Note: Interface admin status must be disabled to configure or update parameters for the following interface configurations:

flowcontrol {on | off} - Enables / Disables 802.3x flow control functionality.
speed {10 | 100 | 1000 | 2500 | 10000 | 25000 | 40000 | 50000 | 100000 | auto | nonegotiate} - Sets the speed settings.
802.3 ap advertisement - Enables 802.3ap Backplane protocol for link training on the interface.

Link Layer Discovery Protocol Enabled by Default

As of release 22.01.5, Link Layer Discovery Protocol (LLDP) is enabled by default on all Skylight Flex 100 interfaces.

Note: LLDP can be disabled if needed but will be enabled following a factory reset.

SAT Y.1564 Layer 2 Standard Frame Format Support

Release 22.01.5 provides support for Y.1564 Layer 2 standard frame format.

L2CP Frame Transparency and Passthrough Support

Support for L2CP transparency mode and passthrough is configurable on per protocol basis.

When enabling or disabling L2CP transparency, the following L2 control protocol sets share the same destination MAC and therefore have matching configurations.

  • GMRP, MMRP (01:80:C2:00:00:20)
  • GVRP, MVRP (01:80:c2:00:00:21)
  • LACP, EOAM (01:80:c2:00:00:02)

For example, when GMRP protocol is configured for L2CP transparency, the MMRP protocol will also be set to L2CP transparency mode, even if explicit configuration for MMRP protocol is not made.

CLI Commands

Release 22.01.5 of Skylight Flex 100 adds additional CLI command support.

  • l2protocol-passthrough: Sets the option to passthrough L2 protocol packets transparently received on port.
  • set sat test-frame-format: Configures the test frame format type for SAT sessions.

Supported Features

The following key features are supported by Skylight Flex 100 in release 22.01.5:

Device Infrastructure and Management Features

  • SNMP (v2c, v3) agent and MIB support
  • NETCONF support
  • Configuration Save and Restore
  • CLI (Console, SSH), multiple user privilege levels
  • DHCP client - IPv4
  • DNS client - IPv4
  • Syslog client and relay agent – IPv4
  • Configuration upgrade through TFTP or SFTP file transfer – IPv4 and IPv6
  • IP authorized managers – IPv4
  • Management RJ45 port 10M, 100M and 1G
  • Auxiliary port 10G
  • Traffic port 100G
  • Jumbo frame support
  • Auto-negotiation of speed and duplex modes
  • Zero Touch Provisioning
  • PM Telemetry
  • Platform Monitor

Basic Layer 2 Ethernet Connectivity Features

  • 802.3x flow control
  • CPU rate limitation for storm protection
  • Rate limiting
  • Port mirroring
  • 802.1Q Customer VLAN bridging functionality
  • LLDP
  • RMONv1 – statistics, history, alarm, event
  • ACLs (Access Control Lists) – L2 (Ethernet header) for traffic filtering
  • Link Aggregation (802.3ad)

Advanced Layer 2 Ethernet Switching Features

  • 802.1Q Provider Bridge Functionality
  • Ethernet CFM 802.1ag, Y.1731
  • Basic E-LINE Ethernet Services creation
  • VLAN translation support
  • MEF 10.2 and 10.3 bandwidth regulator
  • Layer 2 Flow Filtering based on multiple VLAN headers
  • VLAN Header Re-marking in double tagged scenario
  • E-LINE Ethernet Services – 2 TAG support
  • Active Standby Link Protection using LAG (LACP)
  • E-SAT – Y.1564
    • Simple CIR Test
    • Step Load CIR Test
    • EIR Configuration Test
    • Traffic Policing Test
    • Frame Transfer Delay (FTD) values in microsecond precision for both SAC configuration and report
    • Frame Delay Variations (FDV) values in microsecond precision for both SAC configuration and report
    • Frame Loss Ratio (FLR) configuration in SAC profile is extended to support fractional value (example: 0.01%)
    • Layer 1 and Layer 2 Flow configuration support
    • Maximum SLA session creation has been extended to 100 with ID ranges from 1 to 100; the maximum number of active/concurrent SAT sessions running in the system is 10
  • Facility Loopback for SAT testing

Support in Release 22.01.5

Scalability Support

The following table contains the details of scalability tested in this release:

Scalability ParametersScalability Value
Max number of CLI users on one device​15
Max number of simultaneous SSH/Telnet sessions8
Max L2 Filter entries246
Max L3 Filter entries256
Max QoS Policy map512
Max QoS Meters512

Note: Supported QoS Meter ID from 1 to 1,000.

Max Y.1564 services supported100
Number of EVC Entries1000
Number of MEPs supported in the systemTotal UP MEP supported – 1000

Total Down MEP supported – 1000​

Total UP MEP and Down MEP together supported - 1000

PM-SLM / DMMTotal UP MEP supported – 1000

Each MEP supports up to 3 SLM Sessions and 3 DMM Sessions

With 1000 MEP, 3000 SLM Sessions and 3000 DMM Sessions

100GE Flex Supported Transceivers

The following table details the supported transceivers for this release:

Note: RS-FEC is not currently supported on Flex. Refer to the QSFP28 (Flex 100) and SFP28 (Flex 25) manufacturers datasheets for the maximum reach without RS-FEC.

Product SKU
QSFP28, 100GBASE-SR4, 850nm, OM4: 100m
QSFP28, 100GBASE-LR4, 1310nm, OSx: 10km
QSFP28, 100GBASE-ER4, 1310nm, OSx: 40km
SFP+, 10GBASE-SR, 850nm, OM3: 300m
SFP+, 10GBASE-LR, 1310nm, OS2: 10km
SFP, 1000BASE-SX, 850nm, OM2: 550m
SFP, 1000BASE-LX10, 1310nm, OSx: 10km
SFP, 1000BASE-EX, 1550nm, OSx: 50km
SFP, 1000BASE-T, Cat 5: 100m

Operational Considerations

This section documents the operational considerations related to Skylight Flex 100 release 22.01.5.

Access Control List Considerations

The order of operation/matching of ACL rules is based on the order of the ACL configuration; a separate field/configuration to specify priority of the ACL is not supported.

ACLs associated with the port, when requiring modification, will have to be deleted and reconfigured with updated field value.

Addressed Issues

This section lists issues corrected in Skylight Flex 100 release 22.01.5.

ZTP changes not saving
When implementing the ZTP process by getting an IP for the created VLAN interface from the DHCP server and changing its mode from DHCP to static by assigning the same IP, the VLAN interface configuration, including its directly connected route, is lost after save and reload.

This issue has been fixed.

Hyphen and dash characters not supported in CFM ICC name
Unable to use hyphen or dash character in ICC name when creating CFM.

This issue has been fixed.

CFM SLM alarm not cleared
Although frame loss does not occur, CFM SLM alarm is still being raised.

This issue has been fixed.

Vulnerability scan
Recent vulnerability issues have been fixed.

  • Remove weak Cipher
  • Password management hardening

Note: For fix relating to SSH server vulnerability issue, the parameters -o KexAlgorithms=diffie-hellman-group14-sha1 must be added to SSH client.
This is required following the initial upgrade to version 22.01.5 or the first connection after a factory reset.
Full command line: ssh -o KexAlgorithms=diffie-hellman-group14-sha1 root@< Flex IP address >

Downloading firmware causing issues with SNMP
When you perform an “archive download-sw /overwrite […]”, SNMP loses communication until the download stops.

This issue has been fixed.

If auxiliary (extreme/gigabit) negotiation is OFF, 1G Port stops working
1G SFP port is not operational when auto-negotiation is disabled. Auto-negotiation must remain enabled and value must not be modified.

This issue has been fixed.

DMM minimum values go to 0 for one minute
CFM DMM minimum values for telemetry statistics go to 0 for the first 60 seconds.

This issue has been fixed.

Y1564 test producing packet loss

Y.1564 test with certain EMIX pattern producing packet loss; no losses with fixed packet size.

This issue has been fixed.

L2 protocols passing transparent
L2 protocols reaching a port do not pass transparent to the other device.

This issue has been fixed.

Lost access when changing MTU size on 100 Gb port
Access is lost (in-band management) when changing MTU size on 100 Gb port.

This issue has been fixed.

Support ZTP for OLO device with dual VLAN
Skylight Flex 100 does not support ZTP for OLO devices with dual VLAN.

This issue has been fixed.

L2 protocols not passing using CVLAN
L2CP protocol cannot be tunneled when using C-VLAN. It works properly when using S-VLAN.
This issue has been fixed.

MTU change on in-band management
When managing Skylight Flex 100 using in-band management, and the MTU must be changed, Interface must first be administratively down (disabled) before setting MTU; this is causing management to be lost.

This issue has been fixed.

Default SSH password: "admin" not updating
Default SSH admin password admin cannot be updated.

This issue has been fixed.

Note: Upon bring-up of the board, use the following configuration to set the admin password:

# configure terminal
(config)# admin username admin password <CLIENT-PASSWORD>

Output bitrate exceeding the CIR+EIR boundary
Concerning MEF10.2 Bandwidth Policer, output bitrate exceeds the CIR+EIR boundary for traffic rates less than 100 Kbps.

This issue has been fixed.

Skylight Flex 100 Release 22.01.5 Lifecycle

This section lists the planned lifecycle dates of this software release. See the table below outlining the following milestones:

General AvailabilityDate where the product is available for general field deployment for both new installations and upgrades.2023-06-20
End of Security SupportDate where security patches will no longer be delivered for this release. Any correctives for security defects required after this date will be delivered using the next major release of the software.Next Major Release
Last Time Buy / Last Time ShipDate where this release can no longer be purchased from Accedian.2024-06-20
End of Product SupportDate where functional patches will no longer be delivered for this release. Any correctives for functional defects required after this date will be delivered using the next major release of the software.2024-06-20
End of Technical SupportDate where technical assistance is no longer available from the Accedian Technical Assistance Center for this release.2028-06-20

© 2024 Accedian Networks Inc. All rights reserved. Accedian®, Accedian Networks®,  the Accedian logo™, Skylight™, Skylight Interceptor™ and per-packet intel™, are trademarks or registered trademarks of Accedian Networks Inc. To view a list of Accedian trademarks visit: 

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