Are IPs starting from 0 allowed?

RouterOS Beginner Basics
1

I am trying to connect RB951G-2HnD to internet via GSM phone, but after connection established I can’t ping anything in the internet receiving “no route to host” error message, while routing table seems fine. The only suspicious thing for me is an IP address starting from zero. Does it might produce described problem for RouterOS 5.25?

[admin@test18] > ip adresses print   
Flags: X - disabled, I - invalid, D - dynamic 
 #   ADDRESS            NETWORK         INTERFACE                              
 0   192.168.0.64/24    192.168.0.0     b1                                     
 1 D 10.224.156.85/32   0.224.156.85    ppp-out1       
                        
[admin@test18] > 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 ADS  0.0.0.0/0                          0.224.156.85              1
 1 ADC  0.224.156.85/32    10.224.156.85   ppp-out1                  0
 2 ADC  192.168.0.0/24     192.168.0.64    b1                        0

[admin@test18] > ping 8.8.8.8
HOST                                     SIZE TTL TIME  STATUS                 
                                                        no route to host       
                                                        no route to host       
                                                        no route to host       
    sent=3 received=0 packet-loss=100% 

[admin@test18] > ping 0.224.156.85
HOST                                     SIZE TTL TIME  STATUS                 
                                                        22 (Invalid argument)  
                                                        22 (Invalid argument)  
                                                        22 (Invalid argument)  
    sent=3 received=0 packet-loss=100% 

[admin@test18] > ping 10.224.156.85
HOST                                     SIZE TTL TIME  STATUS                 
10.224.156.85                              56  64 4ms  
10.224.156.85                              56  64 1ms  
10.224.156.85                              56  64 1ms  
    sent=3 received=3 packet-loss=0% min-rtt=1ms avg-rtt=2ms max-rtt=4ms
2

You mean the default route? That’s normal

Sent from my SCH-I545 using Tapatalk

3

One of the network entries is clearly wrong.

The network entry for the PPP entry 10.224.156.85/32 should be 10.224.156.85 . The incorrect entry has also found its way to the default route which will be causing the problem described.

4

Yes, I mean gateway address in default route:

 #      DST-ADDRESS        PREF-SRC        GATEWAY            DISTANCE
 0 ADS  0.0.0.0/0                          0.224.156.85              1



You are right. This looks strange. Although all this configured automatically during connection establishment process, I have tried to fix it manually, but still no luck .

Here I have a static default route to ppp-orange:

[admin@test18] > 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  DS  0.0.0.0/0                          0.225.35.221              1
 1 A S  0.0.0.0/0                          ppp-orange                1
 2   S  0.225.35.221/32                    10.225.35.221             1
 3 ADC  10.225.35.221/32   10.225.35.221   ppp-orange                0
 4 ADC  192.168.0.0/24     192.168.0.64    b1                        0
[admin@test18] > ping 8.8.8.8
HOST                                     SIZE TTL TIME  STATUS                                                                                                 
8.8.8.8                                                 timeout                                                                                                
8.8.8.8                                                 timeout                                                                                                
    sent=2 received=0 packet-loss=100%

Here I have no static default route to ppp-orange:

[admin@test18] > 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  DS  0.0.0.0/0                          0.225.35.221              1
 1   S  0.225.35.221/32                    10.225.35.221             1
 2 ADC  10.225.35.221/32   10.225.35.221   ppp-orange                0
 3 ADC  192.168.0.0/24     192.168.0.64    b1                        0
[admin@test18] > ping 8.8.8.8  
HOST                                     SIZE TTL TIME  STATUS                                                                                                 
                                                        no route to host                                                                                       
                                                        no route to host                                                                                       
                                                        no route to host                                                                                       
    sent=3 received=0 packet-loss=100%

From what I see in log now (please see an attached log) this is a modem (cell phone operator?) suggests me these settings.
Probably I need to take a tighter look at modem tuning (which is actually cell phone Nokia 2710).

If someone can hint me a good guide explaining its GPRS/EDGE settings it would be great.
log.0.txt (18 KB)

5

Perhaps you could try with a different phone/SIM and see if the problem is resolved. The address starting zero is definitely invalid.