Known Limitations

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

In a scaled setup with LDP over RSVP configuration and maximum-ecmp as 32 or 64, line card CPU usage can remain high for extended duration on link flap operation. In this duration, LACP might take 5+ minutes to converge and the AE bundle to be active. PR1624219

On all Junos platforms, agentd process crash will be seen in telemetry streaming longevity test.PR1647568

If proper gap is given between channelisation and dechannelisation the issue is not seen. Proper gap means allowing the system to complete the previous config before we load the new config. Recommendation is to if we give channelisation config commit wait for the links to come up or atleast the ifd's get created on both evo and RE side and then only revert the config to dechannlisation and vice versa. PR1665625

VM host snapshot recovery is not enabled for RE-S-X6-128G-K. PR1674091

Even though GRES is enabled. show system filesystem encryption status command display information about the specific Routing Engine only.PR1674373

For IPv6 traffic that is ingressing into an Abstract Fabric (AF) interface via MPC11e card, and also sampled, the OutputIntf in the flow records may not be captured if nexthop-learning knob is not enabled. PR1680873

MVRP on PVLAN promiscuous port is not supported. If MVRP is configured on promiscuous port, then hosts connected to secondary VLAN ports will not be able to reach external world through promiscuous port carrying primary VLAN tags. PR1693345

When upgrading from releases before Junos OS Release 21.2 to Release 21.2 and onward, validation and upgrade might fail. The upgrade requires using the 'no-validate' option to complete successfully. https://kb.juniper.net/TSB18251PR1568757

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. Work around is to remove local-reversion configuration. PR1576979

On MX and EX9200 serial platforms, under Ethernet VPN (EVPN) environment, packets routed using IRB interface could not be fragmented due to media maximum transmission unit (MTU) problem. PR1522896

When the "deactivate services rpm" 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. Issue cannot be seen using the following steps. 1. deactivate routing-options rpm-tracking 2. commit the configuration then all the rpm tracked routes will be deleted. If the RPM service needs to be deactivated, 3. deactivate services rpm 4. commit. PR1597190

On Mx platforms, VPLS flood traffic loss is observed if flood composite next-hops are out-of-sync on ingress and egress FPCs during transport path revertion.PR1656216

When "routing-options transport-class fallback none" is not configured - do not configure more than 10 transport-classes. Or advertise more than 10 distinct colors in SRTE or FlexAlgo. This limitation will be fixed by PR-1695020. PR1648490

In release 17.4 and forward, subscriber sessions on the LNS that send an ICRQ that includes RFC5515 AVPs may fail to establish a session. The client will receive a CDN error "receive-icrq-avp-missing-random-vector" in response. PR1493289