Known Limitations

For VXLAN decapsulation at line rate, maximum pkt size is 1182Bytes, after which MMU drops might be observed at decap node. PR1873759

On QFX5240, for packets undergoing VXLAN decapsulation, line-rate throughput is not achieved on 50G/100G ports for <=1518 bytes packet and 200G ports for <=2048 bytes packet. PR1873579

When 40G and 100G xcvrs are used together on the 16x100G PIC of QFX5700 such that they are connected to the same vendor serial-deserializer core on the Packet Forwarding Engine side, then one or more of the links from these interfaces may not come up. With this PIC, ports 0-3, 4-7, 8-11 and 12-15 share one vendor serial-deserializer core each. PR1867341

2x200G channelization is not supported on the QFX5700 platform for the 23.4X100-D40-EVO release. PR1884887

With IGMP Snooping in EVPN-VXLAN with Mrouter sync feature enabled with clear bgp neighbor all in router where the igmp query is learnt locally when this aggregated Ethernet goes from up to down state and all its mrouter states are removed and then the aggregated Ethernet comes up [after core isolation] and the traffic coming into the system from another esi-lag gets dropped till all the query is learnt in aggregated Ethernet (AE) and it becomes mrouter. This is the design limitation as it has core isolation in place and in this scenario we expect the traffic loss [12 sec] i.e till the time aggregated Ethernet (AE) has learnt all the incoming queries from all vlan and marks its ifl as mrouter interface in corresponding vlan.PR1876740

PRBS is not supported on the optics 'QSFP28-100G-LR'. This optics has PAM4 modulation on the Line side & NRZ modulation on the host side. As soon as prbs packets received from host side, module is not able to distribute the same on the line side due to modulation mismatch. Due to this, Signal Detect is brough down and the prbs packets are not sent end-to-end. PR1894769