The hold type is not good:
Explanation:
- hold: Next hop is waiting to be resolved into a unicast or multicast type.
Just for the fun of it try to add static arp entry on R4 ge-0/0/0
root@R4# exit
Exiting configuration mode
root@R4> show configuration interfaces ge-0/0/0
unit 0 {
family inet {
address 172.27.0.6/30;
}
}
root@R4> show arp interface ge-0/0/0.0
root@R4> show route forwarding-table destination 172.27.0.5
Routing table: default.inet
Internet:
Destination Type RtRef Next hop Type Index NhRef Netif
172.27.0.5/32 dest 0 172.27.0.5 hold 555 5 ge-0/0/0.0
Routing table: __master.anon__.inet
Internet:
Destination Type RtRef Next hop Type Index NhRef Netif
default perm 0 rjct 521 1