Known Limitations

When the device is up and running for a long time, there is a possibility FS gets bad blocks and it is accumulated. When any change done to it, it reloads and tries to recover the bad blocks from the FS. PR910445

When cmerror disables the Packet Forwarding Engine, it does not power off the EA and HCM chips. Temperature monitoring continues on the HMC and other devices, and the system can take proper actions, such as increasing the fan speed or shutting down the systems. PR1324070

This ping latency behavior is expected for host generated ICMP traffic due to the design of Packet Forwarding Engine queue polling the packets from ASIC. PR1380145

ping

10 packets transmitted, 10 packets received, 0% packet loss

round-trip min/avg/max/stddev = 8.994/51.885/106.449/26.824 ms

Currently, IPv4 options router are not supported and traffic is not hitting the egress firewall filter. For more information, see https://www.juniper.net/documentation/us/en/software/junos/routing-policy/topics/concept/firewall-filter-match-conditions-for-ipv4-traffic.html PR1490967

LFM might flap during MX Series Virtual Chassis ISSU to and from this release. PR1516744

An MGD core file is generated on performing the help apropos command in configuration mode. The MGD will restart and as long as the command is not issued again. PR1552191

BUM traffic replication over VTEP is sending out more packets than expected and there seems to be a loop in the topology. PR1570689

The PTP FPGA is kept in reset during BIOS boot. During Linux boot, the PTP FPGA is taken out of reset and pcie-tree is reenumerated. Therefore, you might see the Link-up/down during this sequence. PR1572061

When a packet, which triggers ARP resolution, hits services interface style filter on the output will have session create and close log with incorrect ingress interface. This typically occurs with the first session hitting such a filter. PR1597864

Enhanced policer counter output shows double value when policer is applied in the ingress direction. The output shows normal when the filter is applied in the egress direction. PR1615373

When the show command show services web-filter secintel-policy-db ip-prefix-information is being used, exact prefix mentioned in the feed file database needs to be provided. PR1615465

Packet errors are detected in PSV block message and traffic loss is seen, when sending 250G traffic using filter with next term. PR1617385

Percentage physical-interface policer is not working on aggregated Ethernet, after switching between baseline configuration to policer configuration. PR1621998

Scaled number of PPPoE subscribers are hosted on PS anchored over RLT interface. When you try to remove LT member link from the RLT bundle, some of the subscribers might go down. As a workaround, bring down all the subscribers before removing RLT member links. PR1623641

Media install (USB, PXE) and media-zeroize operations do not succeed and boot time is increased. PR1624053

In ULC-based linecards, you can see duplicate leaf values for the following counters exported in /interfaces/interface/state/counters hierarchy - in-unicast-pkts in-broadcast-pkts in-multicast-pkts in-pause-pkts in-errors in-discards out-unicast-pkts out-multicast-pkts out-broadcast-pkts out-pause-pkts out-errors out-discards. These leaves are produced by picd and aftd-trio. PR1624864

While upgrading the software image from Junos OS Release 21.2 to Junos OS Release 21.3 or later, it is mandatory to use no-validate command. PR1586481

With local reversion ON, there is a possibility of transit router not informing headend of RSVP disabled link when link is flapped more than once. As a workaround, remove the local-reversion configuration. PR1576979

The following error message occurs while running clear vpls mac-table. [Mar 9 06:20:42.795 LOG: Err] disp_force_callout(1994): EA[0:0].disp[0] forced callout timeout 0 msec. [Mar 9 06:20:42.795 LOG: Err] luss_send_callout_parcel(793): EA[0:0].disp[0] failed to send callout parcel (ptype 14, snum 977 tid 0). [Mar 9 06:20:43.510 LOG: Err] dispatch_event_handler(684): EA[0:0].disp[0] PRIMARY_TIMEOUT (PPE 4 Zone 8). PR1575316

When the and deactivate routing-options rpm-tracking CLIs are applied together and then committed. Some of the rpm tracked added routes are not deleted from the routing table. PR1597190

Routing Engine-based BFD sessions might flap during switchover when there are large number of BFD, IS-IS, OSPF and LDP packets to be sent out. PR1600684