In SRX chassis cluster, when interface speed is changed from 10G to 25G , physical interface is displayed under reth interface.

After changing the speed of the interface on node 1 from 10gb to 25gb interfaces are not showing, reth interface do not attach to the physical nic since the speed has changed.

As shown below, node0 ports, ge-0/0/x shows reth mapping but node1 ports, ge-7/0/x do not show reth interface mapping. 

We can use the configuration below to change the link-speed on both reth port and its mapped physical members.

set interfaces ge-0/0/5 speed 25g

set interfaces ge-7/0/5 speed 25g

set interfaces reth2 redundant-ether-options link-speed 25g

If the config change still doesn’t work, then failover the RG0 or reboot both devices to make the reth port work with 25g speed.