PTX and QFX series running Junos Evolved

Junos Software Service Release version 20.2R1-S1-EVO is now available for download from the Junos software download site
Download Junos Software Service Release:

1. Go to Junos Platforms - Download Software page
2. Input your product in the "Find a Product" search box
3. From the Type/OS drop-down menu, select Junos SR
4. From the Version drop-down menu, select your version
5. Click the Software tab
6. Select the Install Package as need and follow the prompts

Junos Software service Release version 20.2R1-S1-EVO is now available.

20.2R1-S1-EVO - List of Fixed issues

PR Number	Synopsis	Category: PFE SW evo-pfemand,packet-io on BRCM platforms running EVO
1499009	QFX5220 does not support the following matches which were supported on QFX5200: first-fragment, tcp-established, Is-fragment, and Hop-limit. Product-Group=evo	QFX5220 does not support the matches that were supported on QFX5200: ? first-fragment ? tcp-established ? Is-fragment ? Hop-limit
PR Number	Synopsis	Category: Tracking PD specific issues on BRCM platforms running EVO
1520133	QFX5220-32CD: CRC errors seen with 4x100G FR4/DR4 Optics in environmental stress test Product-Group=evo	On QFX5220-32CD, CRC errors may be seen on random ports with 4x100G FR4/DR4 during stress test at high and cold temperature with voltage margin high.
PR Number	Synopsis	Category: DNX L2 related features
1517074	L2ALD crash is seen during stability test with traffic on scaled set-up. Product-Group=evo	The L2ALD process on an ACX platform may restart unexpectedly during interface flaps.
PR Number	Synopsis	Category: Interface PRs defect & enhancement requests
1518692	Minimum IFD Mtu recommended with IPv6 configuration Product-Group=evo	As per RFC 2464, the min datagram size supported is 1280 for IPv6.Including Ethernet header (14), the min IFD MTU value supported should be 1294. Up to Junos software version 20.1 release, it is allowed to set IFD MTU with a value less than 1294 bytes for IPv6 configuration. This configuration will result in traffic loss. Hence this configuration is not supported from 20.2 release onwards.
1521978	EVO-Brackla-PDT: Last Flapped of virtual interfaces like AE is not updated when AE transitions from DOWN to UP state Product-Group=evo	Before and In release chain 19.4. Lastflap time on virtual interfaces like AE is not updated when interface transitions up. It is updated only when interface transitions down.
PR Number	Synopsis	Category: EVO MACSEC Platform Independent Implementation
1517985	PTX10008:-Do not Configure Confidentiality offset other than 0 Product-Group=evo	Configuring Confidentiality offset other than 0 does not work properly and can lead to traffic failure eventually.
PR Number	Synopsis	Category: EVPN Layer-2 Forwarding
1520078	Unable to create a new VTEP interface Product-Group=evo	In all platforms with VXLAN Static VTEP tunnels scenario (including Static VXLAN without EVPN), after RE switchover or restart of l2-learning, if create a new VTEP interface, the interface may not work.
PR Number	Synopsis	Category: Express PFE CoS Features
1506855	Shapers applied on Interface Output Queues, either through the transmit-rate "exact" or "rate-limit" knob may not sometimes draw the expected output scheduler accuracy. Product-Group=evo	Shapers applied on Interface Output Queues, either through the transmit-rate "exact" or "rate-limit" knob may not sometimes draw the expected output scheduler accuracy.
1514722	The evo-aftmand-bt might crash if FPC offline is performed during the system comes up Product-Group=evo	During the system comes up, if FPC offline is performed,the evo-aftmand-bt crash might be seen.
PR Number	Synopsis	Category: Express PFE FW Features
1503145	There is a discrepancy of 22 bytes for the same exact packets between the firewall filter in EVO and in Junos Product-Group=evo	There is a discrepancy of 22 bytes for the exact same packets between the firewall filter in Junos OS Evolved and in Junos OS. From an RPM perspective, probes are sent and received correctly. Issue is in the byte counts reported by the firewall filter.
PR Number	Synopsis	Category: Multiprotocol Label Switching
1502993	CSPF job might get stalled for new/existing LSP in high scale LSP setup Product-Group=evo	On all Junos platforms under MPLS-TE scenario with high scale LSPs (e.g., 20K), CSPF job might get stalled for new/existing LSP if some configuration changes (which impacts the rpd process) are done when CSPF job is suspended and pending. TED (Traffic Engineering Database) CSPF (Constrained Shortest Path First) job goes in a state where it is not able to recover till the time rpd process is restarted. This defect could only be observed in 20.2R1 or 20.2R1-EVO release.
PR Number	Synopsis	Category: KRT Queue issues within RPD
1505769	Configuring MTU at the IFF level greater than IFD MTU causes blocking traffic Product-Group=evo	On EVO platforms, if MTU configured under physical interface (IFD) is greater than MTU configured under same interface with family inet or family inet6 (IFF), aftmand might have catastrophic event. In the end, no traffic could be forwarded by aftmand. Please make sure IFD MTU need to be configured with lower value than IFF MTU.
PR Number	Synopsis	Category: Bug and Review Tracking for Segment routing traffic eng
1513583	Modifying the segment list of the SR LSP might not work Product-Group=evo	If "source-packet-routing segment-list" is configured, change in the number of hops might not be able to trigger route change with updated segment list.
PR Number	Synopsis	Category: Express PFE L2 fwding Features on ZX platforms
1511601	PFE generates MLP's with global-no-mac-learning enabled Product-Group=evo	Global mac learning and policing (MLP) setting was not working when configured through CLI.

 

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20.2R1-S1-EVO - List of Known issues

PR Number	Synopsis	Category: Express BT PFE L3 Features
1517828	Ip option transit traffic is being dropping at mid-points Product-Group=evo	PTX IP option packet is not forwarded to next router.
1518368	Impact on the traffic throughput performace in some scenarios. Product-Group=evo	When all 5X400g ports are used inside 1 portion of Chip, there can be impact on the traffic throughput performace.
1519839	EVO:Scapa With L3VPN/6vPE config in DUT, LDP-LFA link protection fails with continuous traffic loss in DUT [Regression issue] Product-Group=evo	Issue EVO:Scapa With L3VPN/6vPE config in DUT, LDP-LFA link protection fails with continuous traffic loss in DUT will not be addressed in 20.2R1 release.
PR Number	Synopsis	Category: Issues related to evo operations - libevo infra, typeinfo ..
1519427	large number of publish-deleted hwdre anomalies are dumped after 2nd iteration of the switchover from re1 (master) to re0. Product-Group=evo	large number of publish-deleted hwdre anomalies are dumped after 2nd iteration of the switchover from re1 (master) to re0.
PR Number	Synopsis	Category: software upgrade infra issues
1470943	Block unified ISSU commands from the CLI for Junos OS Evolved Release 19.4R1. Product-Group=evo	Since ISSU is not supported in Junos OS Release 20.2R1 for PTX10008, following commands are removed/blocked from CLI 1. request system software validate-restart 2. Request system software add <> restart 3. show system software add-restart.
PR Number	Synopsis	Category: Ztp related issues
1518946	request system zeroize command does not reboot the device. Product-Group=evo	request system zeroize command does not reboot the device.
PR Number	Synopsis	Category: Express PFE CoS Features
1478811	[cos] [scheduler] scapa:scheduler with all queues oversunscribed, max latency is different on different queues - 21ms ~ 29ms Product-Group=evo	CoS scheduler: With all queues oversubscribed, maximum latency varies among queues (21ms to 29 ms)
1501083	PTX10008 EVO: Tail drops (VOQ drops) are consistently seen on a High priority queue (AF4) with "shared" buffer configs Product-Group=evo	A PTX10008 system running Junos EVO software with "shared" buffer configuration may see Tail drops - aka VOQ drops - on the high priority queue (AF4). This happens when the number of packet flows is too low to properly load balance traffics over member links of AE interface bundles.
1519313	[cos] [scheduler] ardberg:scapa:10GE:serviceability:scheduler queue tx rate is wrong for case with "scheduler priority strict-high + tx-rate exact" configuration (l3_cos_schedulers.robot) Product-Group=evo	queue tx rate is wrong for case with "scheduler priority strict-high + tx-rate exact" configuration (l3_cos_schedulers.robot)
1523066	With traffic running, if the FPC which is connected to traffic generator is rebooted, it might lead to stuck traffic scenario on certain ports post resumption. Product-Group=evo	With traffic running, if the FPC which is connected to traffic generator is rebooted, it might lead to stuck traffic scenario on certain ports post resumption.
PR Number	Synopsis	Category: Chassis mgmt for all QFX systems - chassis MIB, alarms, CLI
1511155	The QFX10000-36Q line card used on QFX10008/QFX10016 platforms may fail to detect any QSFP Product-Group=evo	On QFX10008/QFX10016 platforms with QFX10000-36Q line card used, if detecting an ASIC error of the line card, the QSFP might not be detected and then the PIC might be offline.
PR Number	Synopsis	Category: PTX10K platform specific fabric PRs
1497212	[fabric] [PTX10008]: 6 seconds convergence time is seen during fabric card removal Product-Group=evo	On a PTX10008, six SIBs are required to carry line-rate traffic, with no fabric redundancy. Even when ingress traffic rate is such that five SIBs are sufficient to carry ingress traffic (for example, traffic is less than 1280 Gbps), ungraceful SIB failures result in transient loss of traffic, till system failure handling is triggered. In Junos OS Release 20.1R2, failure handling may result in about 4-6 seconds of traffic loss. We recommend that you take the fabric cards offline by using the request chassis sib offline command before removing the SIBs for maintenance.

 

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First publication 2020-08-12