Ok. Just dosen't make any sense! The EX4200 can ping all of its own interface IP's but the 10.100.0.215 can't be pinged from other switches in the network, but all the other Vlans 10.100.1.215, 10.100.2.215 & 10.100.3.215 can be pinged.
Show route ouput from the EX4200 fibre switch in question
root@EX4200_Level_1> show route 10.100.0.215
inet.0: 9 destinations, 9 routes (9 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.100.0.215/32 *[Local/0] 23:12:25
Local via vlan.0
{master:0}
root@EX4200_Level_1> show route 10.100.1.215
inet.0: 9 destinations, 9 routes (9 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.100.1.215/32 *[Local/0] 1d 04:29:54
Local via vlan.1
{master:0}
root@EX4200_Level_1> show route 10.100.2.215
inet.0: 9 destinations, 9 routes (9 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.100.2.215/32 *[Local/0] 1d 04:30:22
Local via vlan.2
{master:0}
root@EX4200_Level_1> show route 10.100.3.215
inet.0: 9 destinations, 9 routes (9 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.100.3.215/32 *[Local/0] 1d 04:30:32
Local via vlan.3
This is the show route from one of the other EX2200 switches in the network
root@EX2200_GND_A> show route 10.100.0.215
inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.100.0.0/24 *[Direct/0] 2d 02:42:05
> via vlan.0
{master:0}
inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.100.1.0/24 *[Direct/0] 1d 06:41:29
> via vlan.1
{master:0}
root@EX2200_GND_A> show route 10.100.2.215
inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.100.2.0/24 *[Direct/0] 1d 06:09:58
> via vlan.2
{master:0}
root@EX2200_GND_A> show route 10.100.3.215
inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.100.3.0/24 *[Direct/0] 1d 06:10:01
> via vlan.3
This is the ping from the EX4200 fibre switch in question to 10.100.0.215 and 10.100.1.215
root@EX4200_Level_1> ping 10.100.0.215
PING 10.100.0.215 (10.100.0.215): 56 data bytes
64 bytes from 10.100.0.215: icmp_seq=0 ttl=64 time=2.301 ms
64 bytes from 10.100.0.215: icmp_seq=1 ttl=64 time=0.125 ms
64 bytes from 10.100.0.215: icmp_seq=2 ttl=64 time=0.230 ms
64 bytes from 10.100.0.215: icmp_seq=3 ttl=64 time=0.175 ms
64 bytes from 10.100.0.215: icmp_seq=4 ttl=64 time=0.169 ms
64 bytes from 10.100.0.215: icmp_seq=5 ttl=64 time=0.174 ms
64 bytes from 10.100.0.215: icmp_seq=6 ttl=64 time=0.286 ms
64 bytes from 10.100.0.215: icmp_seq=7 ttl=64 time=0.179 ms
^C
--- 10.100.0.215 ping statistics ---
8 packets transmitted, 8 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.125/0.455/2.301/0.699 ms
{master:0}
root@EX4200_Level_1> ping 10.100.1.215
PING 10.100.1.215 (10.100.1.215): 56 data bytes
64 bytes from 10.100.1.215: icmp_seq=0 ttl=64 time=1.968 ms
64 bytes from 10.100.1.215: icmp_seq=1 ttl=64 time=0.184 ms
64 bytes from 10.100.1.215: icmp_seq=2 ttl=64 time=0.129 ms
64 bytes from 10.100.1.215: icmp_seq=3 ttl=64 time=0.177 ms
64 bytes from 10.100.1.215: icmp_seq=4 ttl=64 time=0.128 ms
^C
--- 10.100.1.215 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.128/0.517/1.968/0.726 ms
This is the ping from one of the other EX2200 switches in the network to 10.100.0.215 and 10.100.1.215
root@EX2200_GND_A> ping 10.100.0.215
PING 10.100.0.215 (10.100.0.215): 56 data bytes
^C
--- 10.100.0.215 ping statistics ---
159 packets transmitted, 0 packets received, 100% packet loss
{master:0}
root@EX2200_GND_A> ping 10.100.1.215
PING 10.100.1.215 (10.100.1.215): 56 data bytes
64 bytes from 10.100.1.215: icmp_seq=0 ttl=64 time=5.210 ms
64 bytes from 10.100.1.215: icmp_seq=1 ttl=64 time=3.603 ms
64 bytes from 10.100.1.215: icmp_seq=2 ttl=64 time=3.452 ms
64 bytes from 10.100.1.215: icmp_seq=3 ttl=64 time=4.623 ms
64 bytes from 10.100.1.215: icmp_seq=4 ttl=64 time=3.606 ms
64 bytes from 10.100.1.215: icmp_seq=5 ttl=64 time=3.389 ms
64 bytes from 10.100.1.215: icmp_seq=6 ttl=64 time=3.241 ms
64 bytes from 10.100.1.215: icmp_seq=7 ttl=64 time=3.283 ms
64 bytes from 10.100.1.215: icmp_seq=8 ttl=64 time=3.294 ms
64 bytes from 10.100.1.215: icmp_seq=9 ttl=64 time=3.296 ms
64 bytes from 10.100.1.215: icmp_seq=10 ttl=64 time=3.385 ms
64 bytes from 10.100.1.215: icmp_seq=11 ttl=64 time=4.481 ms
64 bytes from 10.100.1.215: icmp_seq=12 ttl=64 time=3.702 ms
64 bytes from 10.100.1.215: icmp_seq=13 ttl=64 time=4.253 ms
^C
--- 10.100.1.215 ping statistics ---
14 packets transmitted, 14 packets received, 0% packet loss
round-trip min/avg/max/stddev = 3.241/3.773/5.210/0.595 ms