- Introduction
- play_arrow Junos OS Release Notes for ACX Series
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- play_arrow Junos OS Release Notes for cSRX
- play_arrow Junos OS Release Notes for EX Series
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- play_arrow Junos OS Release Notes for JRR Series
- play_arrow Junos OS Release Notes for MX Series
- play_arrow What's New
- play_arrow What's New in 21.4R3
- What's New in 21.4R2
- play_arrow What's New in 21.4R1
- Hardware
- Architecture
- Chassis
- EVPN
- High Availability
- IP Tunneling
- Junos Telemetry Interface (JTI)
- Layer 2 VPN
- Interfaces
- MPLS
- Multicast
- Network Address Translation (NAT)
- Operation, Administration, and Maintenance (OAM)
- Platform and Infrastructure
- Routing Protocols
- Source Packet Routing in Networking (SPRING) or Segment Routing
- Services Applications
- Software Defined Networking (SDN)
- Software Installation and Upgrade
- Subscriber Management and Services
- VPNs
- Additional Features
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- play_arrow Junos OS Release Notes for NFX Series
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- play_arrow Junos OS Release Notes for PTX Series
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- play_arrow Junos OS Release Notes for SRX Series
- play_arrow Junos OS Release Notes for SRX Series
- play_arrow What's New
- play_arrow What's New in 21.4R1
- Application Identification (AppID)
- Authentication and Access Control
- Chassis
- Chassis Cluster-specific
- Flow-Based and Packet-Based Processing
- Hardware
- J-Web
- Network Address Translation (NAT)
- Platform and Infrastructure
- Software Installation and Upgrade
- Unified Threat Management (UTM)
- Additional Features
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- play_arrow Junos OS Release Notes for vMX
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Upgrade Instructions
- play_arrow Junos OS Release Notes for vRR
- play_arrow Junos OS Release Notes for vSRX
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- Licensing
- Finding More Information
- Requesting Technical Support
- Revision History
Resolved Issues: 21.4R3
General Routing
QFX5200: Observed dcpfe core-dump while testing ISSU from 21.1R1.11 to 21.2R1.7 PR1600807
Chassisd generates "Cannot read hw.chassis.startup_time value: m" every 5 seconds on qfx10008 and qfx10016 PR1603588
QFX5100 : Generate an optical power after detached and attached QSFP on disabled interface. PR1606003
AMZN-QFX5200 mib OID ifOutDiscards misbehaving and returning value 0 which is not expected PR1610540
The ports might remain in downstate on QFX5K platforms PR1611354
The packet drop might be seen when packet size exceeds 9000 MTU PR1615447
One-time interface flap might be seen on the QFX5120 platform PR1618891
The interface on the peer device might remain up even after disabling the 10G interface on the Juniper device PR1629637
Traffic loss might be observed on EX4650-48Y and QFX5120-48Y switches when there is a link flap PR1634495
When a new member is added to the VCF, the backup FPC will restart PR1634533
chassisd might crash if chassis disk-partition is configured PR1635812
Routes might be slow to install in the LPM table PR1635887
Multicast traffic received on the INET interface might be dropped PR1636842
The PFE might crash while removing the port from a vlan PR1637013
Junos OS: RIB and PFEs can get out of sync due to a memory leak caused by interface flaps or route churn (CVE-2022-22209) PR1642172
On Junos ACX/PTX/QFX platforms traffic blackholing can occur after interface flaps PR1645488
An interface might be detached from LACP when configuring VLAN tagging in the EVPN-VXLAN scenario on Junos QFX5K platforms PR1645929
Vxlan Tunnel termination fails due to a change in config PR1646489
VCP neighborship might not be formed on the LX4 40G VCP port PR1646561
The firewall might drop inbound packets if the filter is configured under IRB interface PR1646740
The CLNP traffic tunneled through EVPN-VXLAN fabric might get dropped PR1648078
OSPF control packets may get dropped due to the "flow check" function in the interoperability case PR1648272
The local-minimum-links feature not working as expected on QFX5100 VC platforms PR1649637
Traffic Loss will be observed with Virtual-Router PR1650335
L2PT configuration on a transit switch in a Q-in-Q environment breaks L2PT PR1650416
The local-bias might stop working after the device is rebooted PR1651151
The VCP link might take longer time to come up during system reboot/PFE restart PR1651316
Transit traffic might get dropped and protocols might be down when firewall filters are modified PR1651546
The traffic with ether type 0X88FC might get corrupted PR1651703
The MAC address from local CE may not be learned due to the VLAN programming issue PR1651827
The inner tag (C-tag) value might get modified to zero for egress traffic when the inner tag values are copied to the outer tag (S-tag) PR1652976
Port might be down after inserting specific SFP PR1653723
The ARP might not resolve with the native-vlan configuration PR1654215
LACP sent IN SYNC to server facing interface when core-isolation is in effect PR1654459
The interface might not come up on EX platforms PR1656540
FEC link is down after disabling/enabling interface PR1657534
BFD session session-state is showing DOWN while checking Micro BFD Sessions with Authentication in Non-Distributed Mode PR1658317
Valid software licenses might not be in sync between members in the Virtual chassis. PR1658913
The multipath route might be missing when multipath is configured PR1659255
The slave PTP device will not lock its clock with the master PTP device PR1659453
Traffic loss might be seen when a VxLAN port is recovering from a failure PR1659533
On QFX10K Junos platforms configuration of IGMP group range might result in traffic loss PR1659732
MACsec session configured over IFD might be down when an IFL configured on IFD is disabled/deactivated PR1660070
After changing the MTU on an aggregated interface along with IRB the kernel crash might be observed PR1660208
QFX : OSPF Flow Check function violating RFC6864 PR1660369
CoS might not get applied on VC ports PR1660787
VC in unstable state for 3-7 minutes causing traffic loss PR1661349
BUM traffic might loop post adding/removing EVPN-VXLAN FRR configuration PR1662515
IPv6 ND packets might be dropped in QFX5100 and QFX5110 platforms PR1662707
L2 Multicast traffic loss observed on EX4400 Virtual Chassis platform. PR1663102
Verification of stats for BFD session is "UP" while checking BFD session PR1663790
ALB stats not showing in CLI PR1663881
On QFX5K series platforms, duplicate packets might be seen in the multihomed scenario in an EVPN-VxLAN fabric when unicast ARP packets are received PR1665306
Static MACs are not programmed after reboot, resulting in floods of unicast traffic PR1666399
Multihop BFD sessions might remain down in inline mode PR1667751
Shaping-rate is not taking 20bytes of overhead into account. PR1667879
jnxPowerSupplyFailure and jnxPowerSupplyOK might not be generated for backup FPC PR1667952
On specific QFX5k platforms, member links may reduce their configured speed when the other side doesn't have auto-negotiation disabled PR1669436
FPC1 is getting disconnected after ISSU and before switchover while checking ISSU status PR1669702
VLAN translation programming gets deleted from PFE upon deleting the a member interface for LAG. PR1676772
Chassis Clustering
GTP control packets might be incorrectly dropped/passed if there is more than one APN IMSI filter configured PR1673879
Class of Service (CoS)
The fixed classifier may not work in MPLS and VXLAN scenario PR1650051
EVPN
The spine might have stale vtep entry for the ESI even though the host mac is not advertised by the leaf PR1648368
ARP/NS response to anycast IRB might fail due to missing mac-ip entry PR1650202
BUM traffic might be blackholed for ESI configured CE interface flap PR1669811
The ARP/ND entries are not relearnt as expected on the spine with EVPN-VxLAN PR1677521
Forwarding and Sampling
The "jnxL2aldMacNotificationMIBObjects" does not work on certain Junos and EVO platforms PR1647660
Interfaces and Chassis
VRRP flaps between MC-LAG peers when deleting vlans on MC-AE interfaces PR1579016
Traffic loss might be seen for the mac addresses learned on the ICL interface PR1639713
Incorrect configuration and rollback might cause issues with ARP learning between ICL interface and local MC-AE interfaces PR1648271
The MAC address may be learned over the wrong interface in the MC-AE scenario PR1658742
Layer 2 Ethernet Services
[ZTP]:QFX5210-64C : default configs not generated properly from port 32 PR1639410
Network Management and Monitoring
VTEP might report a high speed on the sub-interface, causing SNMP alarms PR1651774
VPNs
[mvpn] QFX10k : Auto-RP is going down after some time on QFX10k in NGMVPN scenario PR1617620