Can we apply the /32 subnet to the address 200.200.200.234?

Question

Is the /32 subnet only for loopback addresses? Can we have the subnet for the non-loopback addresses>

I get the following error, when I am trying to delete the route with a /32 subnet:

 ip route del 200.200.200.234/255.255.255.255 -

Netlink error(code 3) 

Answer 1

A /32 network must be routed since there is no default gateway for a device on it to use to get to addresses off the network (every other address).

In some cases you may see a route like this which is also contained in another route in the routing table. For instance, Cisco routers with later IOS versions will show a /32 route for the actual interface addresses using an L, but the network route will show with a C.

In this example, the L route is the address applied to interface GigabitEthernet0/1, while the C route is the network connected to that interface.

R1#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

      128.190.0.0/16 is variably subnetted, 2 subnets, 2 masks
C        128.190.32.0/19 is directly connected, GigabitEthernet0/1
L        128.190.34.204/32 is directly connected, GigabitEthernet0/1