- Introduction
- Key Features in Junos OS Release 21.4
- 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 cRPD
- play_arrow What's New
- play_arrow What's New in 21.4R1
- What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- 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 What's New
- What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- play_arrow Junos OS Release Notes for MX Series
- play_arrow What's New
- 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 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 QFX 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 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 Junos OS Release Notes for vRR
- Licensing
- Finding More Information
- Documentation Feedback
- Requesting Technical Support
- Revision History
Open Issues
Learn about open issues in Junos OS Release 21.4R1 for vSRX Virtual Firewall.
For the most complete and latest information about known Junos OS defects, use the Juniper Networks online Junos Problem Report Search application.
General Routing
Tag "RT_FLOW_SESSION_XXX" is missing in stream mode. PR1565153
During auto reenrollment of cmpv2 certificates, if the CA server is unresponsive and cmpv2 request retries has reached the maximum limit, then pkid core might occur. PR1580442
With SSL proxy configured along with web-proxy, the client session might not closed on the device even though proxy session ends gracefully. PR1580526
Getting UNKNOWN instead of HTTP-PROXY for application and UNKNOWN instead of GOOGLE-GEN in RT-FLOW close messages These messages can be seen in the RT-flow close log and these are due to JDPI not engaged for the session. This may affect the application identification for the web-proxy session traffic. PR1588139
The prerformance will be improved by set security forwarding-options no-allow-dataplane-sleep command. PR1602564
The switch reason is being shown as nh change instead of sla violated in the best path log message. PR1602571
One needs to configure set security forwarding-options no-allow-dataplane-sleep for high traffic rate use cases. PR1602606
The advanced anti-malware Hash feature is deprecated. PR1604426
Intrusion Detection and Prevention (IDP)
While executing CLI show security idp attack attack-list policy combine-policy, CLI might get stuck and only partial output gets displayed. CLI recovers in its own. PR1616782
Routing Policy and Firewall Filters
When SSL proxy global configuration is set with enable-proxy-on-default-fw-policy-match, the traffic is hitting pre-id policy instead of default policy for Yahoo traffic. PR1542790
For Junos OS 21.4R1 release, policy rematch capability for src-tenant, dest-service dimensions won't be supported due to high risk . PR1625172
VPNs
In certain cases, the PUSH ACK message from the group member to the group key server may be lost. The group member can still send rekey requests for the TEK SAs before the hard lifetime expiry. Only if the key server sends any new PUSH messages to the grooup members, those updates would not be received by the group member since the key server would have removed the member from registered members list. PR1608290