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20.4R1-S1: Software Release Notification for JUNOS Software Version 20.4R1-S1

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Article ID: TSB18013 TECHNICAL_BULLETINS Last Updated: 16 Mar 2021Version: 1.0
Alert Type:
SRN - Software Release Notification
Product Affected:
ACX, EX, MX, PTX, QFX, NFX, SRX, VRR, vMX, vSRX
Alert Description:
Junos Software Service Release version 20.4R1-S1 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
Solution:

Junos Software service Release version 20.4R1-S1 is now available.

20.4R1-S1 - List of Fixed issues
PR Number Synopsis Category: QFX L3 data-plane/forwarding
1563569 On the QFX5110 platform, ARP resolution may fail if 'native-vlan-id' is configured on the VxLAN interface
Product-Group=junos
On the QFX5110 platform, ARP resolution might fail if 'native-vlan-id' is configured on the interface that is part of multiple VxLANs. When this happens, the packets egressing on the interface might be dropped.
PR Number Synopsis Category: BBE database related issues
1554539 During ISSU BNG losses L2BSA sessions without sending Session Stop but stay in authd
Product-Group=junos
When a SDB service session is created and requested to be replicated on the master RE during a full SDB resync like ISSU or VC global switchover, the replication request may be dropped due to a bug in the repd logic attempting to determine if the new service session will be picked up and replicated as part of the full SDB resync .
PR Number Synopsis Category: Border Gateway Protocol
1555288 The BGP session might not come up if extended-nexthop is enabled by default on the other vendor remote peer.
Product-Group=junos
On all Junos platforms, if the BGP remote peer runs other vendor software and enables "extended-nexthop" by default, the BGP session might not come up due to the software defect if the knob is not configured on Juniper device.
PR Number Synopsis Category: QFX Access Control related
1561741 JUNOS:JDI_FT_REGRESSION:PROTOCOLS:SWITCHING:[EX92XX]:[USB_TESTING]:Observing error Opening configuration database: Could not open configuration database during usb upgrading
Product-Group=junos
Limited images are not supported for EX92XX on this release.
1562723 JUNOS:JDI_FT_REGRESSION:PROTOCOLS:SWITCHING:USB Upgrade: Commit issue is seen on ex4300 after loading limited-signed image through USB
Product-Group=junos
Limited image is not supported for EX4300, MX-80/MX-104 in this release.
PR Number Synopsis Category: Host path software for ACX platform
1517420 Transit DHCP packets drop is seen on ACX5448
Product-Group=junos
On ACX5448 Series platforms, the transit DHCP packets drop is seen in the DHCP scenario.
PR Number Synopsis Category: Segment Routing PFE part for v4 + SR-TE
1566828 Pushing more than 2 MPLS labels on ACX5448/ACX710 might not work
Product-Group=junosvae
Due to the code change in PR 1535876 (which is fixed in 20.4R1, 21.1R1), the scenario of pushing more than 2 MPLS labels on ACX5448/ACX710 might not work. For example, in the case of BGP Labeled Unicast (BGP-LU), segment routing traffic engineering (SR-TE) etc., pushing more than 2 MPLS labels on ACX5448/ACX710 acting as ingress router might not work.
PR Number Synopsis Category: Covers Application classification workflows apart from custo
1558812 AppID's Unknown Packet Capture utility does not function on Branch SRX when enhanced-services mode is enabled
Product-Group=junos
AppID's Unknown Packet Capture utility does not function on Branch SRX when enhanced-services mode is enabled.
PR Number Synopsis Category: Configd, ffp issues
1536615 The EVO operational state would be incorrect on the system and CoS schedulers configuration change might not take effect
Product-Group=junos
CoS queue Tx rate change does not take effect even after successful commit.
PR Number Synopsis Category: Express ASIC interface
1512919 Error messages "t6e_dfe_tuning_state:et-6/0/0 - Failed to dfe tuning count 10" might be seen after links flap
Product-Group=junos
On the PTX3000/PTX5000 platforms with t6e-pic installed, the interface may fail to perform DFE tuning after link flaps on those PICs. Because of this, the interface may be stuck in down status.
PR Number Synopsis Category: Flow Module
1563881 usp_max_tcplib_connection is not expected on TVP platforms.
Product-Group=junos
On some platform for examle summit, greatwall, vsrx2.0, the usp_max_tcplib_connection is not expected. The expected is about 1M but the real value is about 300K or 200K.
PR Number Synopsis Category: Layer2 forwarding on EX/NTF/PTX/QFX
1573179 QinQ should not be licensed EX2300/3400/4300/4300MP/4400
Product-Group=junos
release note required by dev team
PR Number Synopsis Category: OSPF routing protocol
1563350 The rpd might crash on Backup RE after the rpd restart is triggered on Master RE
Product-Group=junos
On all Evo platforms, if the rpd restart is triggered on Master RE (using the following command : restart routing immediately) then rpd might crash on Backup RE.
PR Number Synopsis Category: Filters
1472206 On the QFX5000 line of switches, the egress ACL filter entries is only 512 in Junos OS Release 19.4R1.
Product-Group=junosvae
On QFX5K platforms with 19.4R1 release, the Egress ACL filter entries will be only 512 instead of 1022. If we configure an Egress PACL/RACL/VACL filter more than 512 terms, the filter might not be installed.
1561690 Firewall filters might not be working after ISSU
Product-Group=junos
On all Junos platforms, after ISSU is being performed from 20.1, 20.2, 20.3 based releases to 20.4R1 release, the firewall filters might not be working as expected which could impact the traffic.
PR Number Synopsis Category: QFX EVPN / VxLAN
1524955 Traffic loss may be observed on interfaces in a VXLAN environment
Product-Group=junos
On the QFX5K/EX4600 series platforms with VXLAN setup, if changing the VLAN (VXLAN enabled) configuration under an interface stanza from service provider style to enterprise style in a single commit without deactivating/activating the corresponding VLAN configuration under "vlans" stanza, traffic loss may be observed on the interface after the change.
1552671 On the QFX5000 devices, the ARP resolution might fail.
Product-Group=junos
On QFX5K platforms, if access port is part of multiple vxlan vlans with native-vlan configured on some of the vlans and vport scaling enabled, then packets will not be going with the right tag and ARP will not be resolved properly and traffic might be dropped.
PR Number Synopsis Category: SW PRs for SCBE3 related kernel drivers
1564539 MX platforms with MX-SCBE3 may reboot continuously.
Product-Group=junos
A recent change in the kernel boot loader causes a system with MX-SCBE3 to experience the Routing Enginne's kernel memory corruption which causes the system to reboot continuously.
PR Number Synopsis Category: UI Infrastructure - mgd, DAX API, DDL/ODL
1531415 Commit may fail after Routing Engine switchover
Product-Group=junos
During the mgd initialization phase of Routing Engine switchover, if configuration changes are coming from the commit script, which leads to configuration going out of synchronization between master and backup, and then the next commit will fail.
1543037 The license errors may get returned on backup RE when trying to commit the configuration
Product-Group=junos
On all Junos platforms, when trying to commit the configuration, license errors may get returned on backup RE even though the license is installed correctly. This issue doesn't have any service impact.
 

20.4R1-S1 - List of Known issues
PR Number Synopsis Category: QFX PFE L2
1552798 [oam] [oam] : JUNOS:JDI_REGRESSION:PROTOCOLS:SWITCHING: Observed dcpfe core @ is_heap_block, ukern_free, eth_net_detach, dcbcm_eth_attach
Product-Group=junos
Scenarios where failures occur before eth attach but delete invokes eth detach and causing cores because of size differences in the ifd->gether_settings. Originally it was fixed in PR: 1547075 and the same has been back-ported to later release of 20.4.
PR Number Synopsis Category: QFX L3 data-plane/forwarding
1547866 l2ald core observed after loading MCLAG profile configuration occasionally
Product-Group=junos
L2 core shall be seen due to Mac entry list corruption in certain scenarios. It's seen only in regression scripts so far. This is not reproducible consistently. This doesn't impact service.
PR Number Synopsis Category: ACX Services feature
1561751 JDI_FT_REGRESSION:JUNOS:[oam] [oam] ACX5048 :: all oam sessions are not established
Product-Group=junos
The OAM sessions over VPLS will not function properly and may not come up on Peer nodes. This will be resolved in next release. Not fixed in 20.4R1-S1. Will be resolved in 20.4R2.
PR Number Synopsis Category: MX Layer 2 Forwarding Module
1561046 [lag] [lagtag] mx960 :: JUNOS:JDI_FT_REGRESSION:PLATFORM:ROUTING: Traffic is not flowing through AE interfaces
Product-Group=junos
Bridged interface sometimes does not come up when sp-tyle is converted to ep-style (refer at#56)
PR Number Synopsis Category: Border Gateway Protocol
1557604 Multipath info still shown for BGP route even after disabling interface for one path
Product-Group=junos
Multipath info still shown for BGP route even after disabling interface for one path
PR Number Synopsis Category: Covers Application classification workflows apart from custo
1554490 20.2R1 SecPDT: Airbus: SRX380: MiniPDT:Forge-Airbus: nsd core at ../../../../../src/usp/usr.sbin/nsd/common/nsd_main.c:612
Product-Group=junos
Due to enhancements in AppID starting junos release 21.1R1, database files are not compatible with earlier releases. Hence, this issue is expected to be seen during downgrade from 21.1R1 to previous junos releases.
PR Number Synopsis Category: EVPN Layer-2 Forwarding
1560068 QFX10002 :: mac-vrf: QFX10k l2ald core: l2ald_vxlan_ifl_create_event_handler at /src/junos/usr.sbin/l2ald/platform/junos/l2ald_rtsock_vxlan.c:477
Product-Group=junos
Changing forwarding-instance dynamically might cause vtep leak and result in l2ald core sometimes. There are two workarounds for this problem : 1) After forwarding-instance is changed, restart l2-learning process 2) deactivate routing-instance, change forwarding-instance, activate routing-instance
PR Number Synopsis Category: OSPF routing protocol
1563350 The rpd might crash on Backup RE after the rpd restart is triggered on Master RE
Product-Group=junos
On all Evo platforms, if the rpd restart is triggered on Master RE (using the following command : restart routing immediately) then rpd might crash on Backup RE.
PR Number Synopsis Category: Issues related to PKI daemon
1560374 High CPU usage on pkid process might be seen when the device is unable to connect to a particular CRL URL
Product-Group=junos
On all SRX platforms, if the device is unable to connect to a particular CA certificate CRL URL then high CPU usage on pkid process might be observed.
1561169 The DNS commands may not be executed and also any new configuration may not take effect on connecting the SRX device to Sky ATP
Product-Group=junos
On the SRX platforms, after connecting to the Sky ATP portal to download the DNS feed, the DNS command may not execute and the configuration may also not take effect. This may happen if the messages from plugins such as ipfd, nsd and aamwd are not being sent to the PFE.
PR Number Synopsis Category: PTP related issues.
1561348 PTP BC with G.8275.2.enh profile_2 512 clients do not come up.
Product-Group=junos
G.8275.2 PTP master ports using auto-slave clients (i.e. a PTP client defined with subnet) will not report the learned clients to the RE / user CLI.
PR Number Synopsis Category: QFX EVPN / VxLAN
1554565 Packet drops are seen after fail-over tests for uplink port on EVPN/VXLAN leaf
Product-Group=junos
When we do a fail-over tests in an EVPN/VXLAN ERB design for uplink port on a leaf; traffic drop might be observed on the leaf side. The cause of the drop is the delay of updating the new tunnel ECMP.
PR Number Synopsis Category: show route table commands, tracing, and syslog facilities
1555866 Configuring HFRR i.e. link-protection on an interface may cause rpd to crash
Product-Group=junos
On MX/VMX/T/TX series platforms, if Host fast reroute (HFRR) is enabled on an interface, the ARP and FRR (BGP backup routes) routes will be added to RIB. Then changing this interface address and adding new ARP route within 10 seconds will cause the rpd to crash.
PR Number Synopsis Category: SW PRs for SCBE3 fabric
1560053 When the system has only one plane (in the process of plane offline/online), the MPC10-10c is seeing destination errors.
Product-Group=junos
When the system has only one plane (in the process of plane offline/online), the MPC10-10c is seeing destination errors.
PR Number Synopsis Category: Generic platform and infra issues for MS-MIC and MS-MPC(XLP)
1561312 [cgnats] [cgnatstag] MX240 :: VIA headers is Not getting changed properly when SIP ALG enabled
Product-Group=junos
VIA headers are Not getting translated under certain call flow
PR Number Synopsis Category: Bug and Review Tracking for Segment routing traffic eng
1561947 [segment_routing] [Dynamic-SRTE] : mx960 :: PROTOCOLS:VMX:spring-traffic-engineering lsp count is not as expected when validating 32K inter-domain DCPSF lsps
Product-Group=junos
The eODN feature supports up to 1K SRTE LSPs with 32K express segment links in TED
Modification History:
First publication 2021-03-16
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