192.168.60.0/32 - what this strange route mean?

RouterOS General
1

I realize that one ip address below was added mistakenly, but what is the corresponding network route with /32 suffix? why is it?

[asurkov@MikroTik] > ip route print
Flags: X - disabled, A - active, D - dynamic, C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme, 
B - blackhole, U - unreachable, P - prohibit 
 #      DST-ADDRESS        PREF-SRC        GATEWAY            DISTANCE
 0 A S  0.0.0.0/0                          82.193.132.1              1
 1 ADC  10.0.0.0/24        10.0.0.254      bridgeLocal               0
 2 ADC  ..........   ................    ether10                   0
 3 A S  192.168.1.0/24                     10.0.0.3                  1
 4 ADC  192.168.60.0/24    192.168.60.254  bridgeLocal               0
 5 ADC  192.168.60.0/32    192.168.60.254  bridgeLocal               0
[asurkov@MikroTik] > ip address print
Flags: X - disabled, I - invalid, D - dynamic 
 #   ADDRESS            NETWORK         INTERFACE                                                                                                
 0   192.168.60.254/32  192.168.60.0    bridgeLocal                                                                                              
 1   10.0.0.254/24      10.0.0.0        bridgeLocal                                                                                              
 2   .......   ..........................    ether10                                                                                                  
 3   192.168.60.254/24  192.168.60.0    bridgeLocal
2

You set it two IP address one with /24 another with /32 and these have the same network
192.168.60.254/32 192.168.60.0 route 192.168.60.0/32 192.168.60.254
192.168.60.254/24 192.168.60.0 route 192.168.60.0/24 192.168.60.254

If you have not set the network the router will complete as router think is correct, but in this case it looks you set manually both networks 192.168.60.0

3

Just remove the /32 address and the route will disappear as well.

4

yes … but why this incorrect route appeared, it shouldn’t as I can see

5

It is not an incorrect route. It is connected route for /32 address.

6

uhm … that’s interesting - is it RouterOS specific connected route? what is it for?

since in vanilla linux nothing like this exists

7

Come on, you made an error in configuration and as a result you see two things in the router (an address and a route).
Remove your error (the /32 address on an ethernet interface with the bad network address) and
both these things will disappear.
No need to make so much fuss about it. Such border conditions can sometimes have uses so it is no good
to refuse them in the user interface. MikroTik routers are for people with knowledge about networks.
Garbage in, garbage out.

8

It is not RouterOS specific. When you add an address you will always have corresponding connected route on any networking device, including your mentioned vanilla linux

ROS:

DST-ADDRESS PREF-SRC GATEWAY DISTANCE

0 ADC 1.1.1.0/24 1.1.1.2 sfp-sfpplus2 0
1 ADC 1.1.1.0/32 1.1.1.2 sfp-sfpplus2 0

Linux:

ip route

1.1.1.0 dev eth1 proto static scope link src 1.1.1.2 realm 254
1.1.1.0/24 dev eth1 proto static scope link src 1.1.1.2 realm 254

9

Yes it does. Have you ever issued a command like “ip route list table local” ?
You will find a /32 host route for each network, interface and broadcast address of all the IPs assigned to your interfaces. Just that /32 routes in Linux don’t have the /32 written out explicitly.