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Joined: Mon Feb 24, 2020 10:57 pm

Crazy Issue

Thu Dec 22, 2022 12:16 pm

Dear all , trying more than a few weeks now to solve a crazy issue. In our routing table there's a "Dir" (Dynamic Active Rip) route describing a 20.0.0.0/8 range. As you understand this is caussinig massive issues with webistes of the "outside world" which are operating under the 20.0.0.0 range. We tryied very hard to find where this route is comming from but we always getting to dead end. This route as a "Dir" route describes the gateway it gets from but even there ( its a mikrotik too) we didn't find any 20.0.0.0/8 ip . Is there any way to trace/find where it comes from ( in case it gets redistrubuted from somewhere else from the network or block it from comming into out routing table? Thanks in advance!
 
erlinden
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Re: Crazy Issue

Thu Dec 22, 2022 12:30 pm

Can you share your /ip route print?
 
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Re: Crazy Issue

Thu Dec 22, 2022 12:35 pm

Can you share your /ip route print?
Hi , yes . Thesere are:

# DST-ADDRESS PREF-SRC GATEWAY DISTANCE
0 A S 0.0.0.0/0 pptp-OTE_Static... 1
1 ADr 20.0.0.0/8 192.168.101.2 120
2 ADr 20.20.0.0/24 192.168.101.2 120
3 ADr 20.20.1.16/28 192.168.101.2 120
4 ADr 20.20.1.48/29 192.168.101.2 120
5 ADr 20.20.1.64/27 192.168.101.2 120
6 ADr 20.20.21.0/24 192.168.101.2 120
7 ADr 20.20.21.220/32 192.168.101.2 120
8 ADr 20.20.21.221/32 192.168.101.2 120
9 ADr 20.20.21.222/32 192.168.101.2 120
10 ADr 20.20.21.223/32 192.168.101.2 120
11 ADr 20.20.21.224/32 192.168.101.2 120
12 ADr 20.20.21.225/32 192.168.101.2 120
13 ADr 20.20.21.226/32 192.168.101.2 120
14 ADr 20.20.21.227/32 192.168.101.2 120
15 ADr 20.20.21.228/32 192.168.101.2 120
16 ADr 20.20.21.229/32 192.168.101.2 120
17 ADr 20.20.21.230/32 192.168.101.2 120
18 ADr 20.20.21.231/32 192.168.101.2 120
19 ADr 20.20.21.233/32 192.168.101.2 120
20 ADr 20.20.21.234/32 192.168.101.2 120
21 ADr 20.20.21.235/32 192.168.101.2 120
22 ADr 20.20.21.236/32 192.168.101.2 120
23 ADr 20.20.21.237/32 192.168.101.2 120
24 ADr 20.20.21.238/32 192.168.101.2 120
25 ADr 20.20.21.239/32 192.168.101.2 120
26 ADr 20.20.21.240/32 192.168.101.2 120
27 ADr 20.20.21.241/32 192.168.101.2 120
28 ADr 20.20.21.242/32 192.168.101.2 120
29 ADr 20.20.21.243/32 192.168.101.2 120
30 ADr 20.20.21.244/32 192.168.101.2 120
31 ADr 20.20.21.245/32 192.168.101.2 120
32 ADr 20.20.21.246/32 192.168.101.2 120
33 ADr 20.20.21.247/32 192.168.101.2 120
34 ADr 20.20.21.248/32 192.168.101.2 120
35 ADr 20.20.21.249/32 192.168.101.2 120
36 ADr 20.20.21.250/32 192.168.101.2 120
37 ADr 20.20.21.251/32 192.168.101.2 120
38 ADr 20.20.21.252/32 192.168.101.2 120
39 ADr 20.20.21.253/32 192.168.101.2 120
40 ADr 20.20.24.0/24 192.168.101.2 120
41 ADr 20.20.24.235/32 192.168.101.2 120
42 ADr 20.20.24.236/32 192.168.101.2 120
43 ADr 20.20.24.237/32 192.168.101.2 120
44 ADr 20.20.24.238/32 192.168.101.2 120
45 ADr 20.20.24.239/32 192.168.101.2 120
46 ADr 20.20.24.240/32 192.168.101.2 120
47 ADr 20.20.24.241/32 192.168.101.2 120
48 ADr 20.20.24.242/32 192.168.101.2 120
49 ADr 20.20.24.243/32 192.168.101.2 120
50 ADr 20.20.24.244/32 192.168.101.2 120
51 ADr 20.20.24.245/32 192.168.101.2 120
52 ADr 20.20.24.246/32 192.168.101.2 120
53 ADr 20.20.24.247/32 192.168.101.2 120
54 ADr 20.20.24.248/32 192.168.101.2 120
55 ADr 20.20.24.249/32 192.168.101.2 120
56 ADr 20.20.24.250/32 192.168.101.2 120
57 ADr 20.20.24.251/32 192.168.101.2 120
58 ADr 20.20.24.252/32 192.168.101.2 120
59 ADr 20.20.24.253/32 192.168.101.2 120
60 ADr 20.20.25.0/24 192.168.101.2 120
61 ADr 20.20.25.240/32 192.168.101.2 120
62 ADr 20.20.25.241/32 192.168.101.2 120
63 ADr 20.20.25.242/32 192.168.101.2 120
64 ADr 20.20.25.243/32 192.168.101.2 120
65 ADr 20.20.25.244/32 192.168.101.2 120
66 ADr 20.20.25.245/32 192.168.101.2 120
67 ADr 20.20.25.246/32 192.168.101.2 120
68 ADr 20.20.25.247/32 192.168.101.2 120
69 ADr 20.20.25.248/32 192.168.101.2 120
70 ADr 20.20.25.249/32 192.168.101.2 120
71 ADr 20.20.25.250/32 192.168.101.2 120
72 ADr 20.20.25.251/32 192.168.101.2 120
73 ADr 20.20.25.252/32 192.168.101.2 120
74 ADr 20.20.25.253/32 192.168.101.2 120
75 ADr 20.20.26.0/24 192.168.101.2 120
76 ADr 20.20.29.0/24 192.168.101.2 120
77 ADr 20.20.29.250/32 192.168.101.2 120
78 ADr 20.20.29.251/32 192.168.101.2 120
79 ADr 20.20.29.252/32 192.168.101.2 120
80 ADr 20.20.29.253/32 192.168.101.2 120
81 ADr 20.20.100.0/24 192.168.101.2 120
82 ADr 20.20.101.0/24 192.168.101.2 120
83 ADr 20.20.102.0/24 192.168.101.2 120
84 ADr 20.20.103.0/24 192.168.101.2 120
85 ADr 20.20.104.0/24 192.168.101.2 120
86 ADr 20.20.106.0/24 192.168.101.2 120
87 ADr 20.20.109.0/24 192.168.101.2 120
88 ADr 20.20.111.0/24 192.168.101.2 120
89 ADr 20.20.150.0/24 192.168.101.2 120
90 ADr 20.20.200.0/24 192.168.101.2 120
 
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Re: Crazy Issue

Thu Dec 22, 2022 12:40 pm

Ok...can you please also share /ip route export?
 
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Re: Crazy Issue

Thu Dec 22, 2022 12:43 pm

Ok...can you please also share /ip route export?
OK , but i see something strange. Lots are missing from export.

# dec/22/2022 12:42:34 by RouterOS 6.49.7
# software id = LWVP-RTPX
#
# model = 2011UAS
# serial number = 4271024E5422
/ip route
add distance=1 gateway=pptp-OTE_Static_Smartnet
add distance=1 dst-address=60.0.0.0/24 gateway=*F0AF87
 
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Re: Crazy Issue

Thu Dec 22, 2022 1:14 pm

Even when we exporter all the configuration , we didn't find this 20.0.0.0/8 record somewhere.
 
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Re: Crazy Issue

Thu Dec 22, 2022 1:46 pm

1 ADr 20.0.0.0/8 192.168.101.2 120
ADr = A - active + D - dynamic + r - rip

You do not have this route on your device, but you receive this route from RIP.
Last edited by rextended on Thu Dec 22, 2022 1:51 pm, edited 2 times in total.
 
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Re: Crazy Issue

Thu Dec 22, 2022 1:50 pm

1 ADr 20.0.0.0/8 192.168.101.2 120
ADr = A - active + D - dynamic + r - rip

You do not have this route on your device, but you receive this route from RIP.

/routing rip export
and
/routing rip route print
Yes , exactly. We receive it from RIP. We investigated all possilbe routers and none of them has such record inside. It this case is there any option to block it somehow?? ( we need access to 20.20.0.0/16) .
 
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Re: Crazy Issue

Thu Dec 22, 2022 1:51 pm

Please:

/ip route print terse where dst-address=20.0.0.0/8
and
/routing rip export
(censore everytime with *** sensitive data, like serial number, keep routeros version)
and
/routing rip route print terse
 
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Re: Crazy Issue

Thu Dec 22, 2022 1:57 pm

Please:

/ip route print terse where dst-address=20.0.0.0/8
and
/routing rip export
(censore everytime with *** sensitive data, like serial number, keep routeros version)
and
/routing rip route print terse
IP router print terse
1 ADr dst-address=20.0.0.0/8 gateway=192.168.101.2 gateway-status=192.168.101.2 reachable via ether8-MyNetOut distance=120 scope=20 target-scope=10 route-tag=0

Routing Rip route ptint terse results

0 R dst-address=20.0.0.0/8 from=192.168.101.2 metric=3 timeout=2m37s
1 R dst-address=20.20.0.0/24 from=192.168.101.2 metric=2 timeout=2m37s
2 R dst-address=20.20.1.16/28 from=192.168.101.2 metric=2 timeout=2m37s
3 R dst-address=20.20.1.48/29 from=192.168.101.2 metric=2 timeout=2m37s
4 R dst-address=20.20.1.64/27 from=192.168.101.2 metric=3 timeout=2m37s
5 R dst-address=20.20.21.0/24 from=192.168.101.2 metric=2 timeout=2m37s
6 R dst-address=20.20.21.219/32 from=192.168.101.2 metric=2 timeout=2m37s
7 R dst-address=20.20.21.220/32 from=192.168.101.2 metric=2 timeout=2m37s
8 R dst-address=20.20.21.221/32 from=192.168.101.2 metric=2 timeout=2m37s
9 R dst-address=20.20.21.222/32 from=192.168.101.2 metric=2 timeout=2m37s
10 R dst-address=20.20.21.223/32 from=192.168.101.2 metric=2 timeout=2m37s
11 R dst-address=20.20.21.224/32 from=192.168.101.2 metric=2 timeout=2m37s
12 R dst-address=20.20.21.225/32 from=192.168.101.2 metric=2 timeout=2m37s
13 R dst-address=20.20.21.226/32 from=192.168.101.2 metric=2 timeout=2m37s
14 R dst-address=20.20.21.227/32 from=192.168.101.2 metric=2 timeout=2m37s
15 R dst-address=20.20.21.228/32 from=192.168.101.2 metric=2 timeout=2m37s
16 R dst-address=20.20.21.229/32 from=192.168.101.2 metric=2 timeout=2m37s
17 R dst-address=20.20.21.230/32 from=192.168.101.2 metric=2 timeout=2m37s
18 R dst-address=20.20.21.231/32 from=192.168.101.2 metric=16 timeout=1m11s
19 R dst-address=20.20.21.233/32 from=192.168.101.2 metric=2 timeout=2m37s
20 R dst-address=20.20.21.234/32 from=192.168.101.2 metric=2 timeout=2m37s
21 R dst-address=20.20.21.235/32 from=192.168.101.2 metric=2 timeout=2m37s
22 R dst-address=20.20.21.236/32 from=192.168.101.2 metric=2 timeout=2m37s
23 R dst-address=20.20.21.237/32 from=192.168.101.2 metric=2 timeout=2m37s
24 R dst-address=20.20.21.238/32 from=192.168.101.2 metric=2 timeout=2m37s
25 R dst-address=20.20.21.239/32 from=192.168.101.2 metric=2 timeout=2m37s
26 R dst-address=20.20.21.240/32 from=192.168.101.2 metric=2 timeout=2m37s
27 R dst-address=20.20.21.241/32 from=192.168.101.2 metric=2 timeout=2m37s
28 R dst-address=20.20.21.242/32 from=192.168.101.2 metric=2 timeout=2m37s
29 R dst-address=20.20.21.243/32 from=192.168.101.2 metric=2 timeout=2m37s
30 R dst-address=20.20.21.244/32 from=192.168.101.2 metric=2 timeout=2m37s
31 R dst-address=20.20.21.245/32 from=192.168.101.2 metric=2 timeout=2m37s
32 R dst-address=20.20.21.246/32 from=192.168.101.2 metric=2 timeout=2m37s
33 R dst-address=20.20.21.247/32 from=192.168.101.2 metric=2 timeout=2m37s
34 R dst-address=20.20.21.248/32 from=192.168.101.2 metric=2 timeout=2m37s
35 R dst-address=20.20.21.249/32 from=192.168.101.2 metric=2 timeout=2m37s
36 R dst-address=20.20.21.250/32 from=192.168.101.2 metric=2 timeout=2m37s
37 R dst-address=20.20.21.251/32 from=192.168.101.2 metric=2 timeout=2m37s
38 R dst-address=20.20.21.252/32 from=192.168.101.2 metric=2 timeout=2m37s
39 R dst-address=20.20.21.253/32 from=192.168.101.2 metric=2 timeout=2m37s
40 R dst-address=20.20.24.0/24 from=192.168.101.2 metric=2 timeout=2m37s
41 R dst-address=20.20.24.235/32 from=192.168.101.2 metric=2 timeout=2m37s
42 R dst-address=20.20.24.236/32 from=192.168.101.2 metric=2 timeout=2m37s
43 R dst-address=20.20.24.237/32 from=192.168.101.2 metric=2 timeout=2m37s
44 R dst-address=20.20.24.238/32 from=192.168.101.2 metric=2 timeout=2m37s
45 R dst-address=20.20.24.239/32 from=192.168.101.2 metric=2 timeout=2m37s
46 R dst-address=20.20.24.240/32 from=192.168.101.2 metric=2 timeout=2m37s
47 R dst-address=20.20.24.241/32 from=192.168.101.2 metric=2 timeout=2m37s
48 R dst-address=20.20.24.242/32 from=192.168.101.2 metric=2 timeout=2m37s
49 R dst-address=20.20.24.243/32 from=192.168.101.2 metric=2 timeout=2m37s
50 R dst-address=20.20.24.244/32 from=192.168.101.2 metric=2 timeout=2m37s
51 R dst-address=20.20.24.245/32 from=192.168.101.2 metric=2 timeout=2m37s
52 R dst-address=20.20.24.246/32 from=192.168.101.2 metric=2 timeout=2m37s
53 R dst-address=20.20.24.247/32 from=192.168.101.2 metric=2 timeout=2m37s
54 R dst-address=20.20.24.248/32 from=192.168.101.2 metric=2 timeout=2m37s
55 R dst-address=20.20.24.249/32 from=192.168.101.2 metric=2 timeout=2m37s
56 R dst-address=20.20.24.250/32 from=192.168.101.2 metric=2 timeout=2m37s
57 R dst-address=20.20.24.251/32 from=192.168.101.2 metric=2 timeout=2m37s
58 R dst-address=20.20.24.252/32 from=192.168.101.2 metric=2 timeout=2m37s
59 R dst-address=20.20.24.253/32 from=192.168.101.2 metric=2 timeout=2m37s
60 R dst-address=20.20.25.0/24 from=192.168.101.2 metric=2 timeout=2m37s
61 R dst-address=20.20.25.240/32 from=192.168.101.2 metric=2 timeout=2m37s
62 R dst-address=20.20.25.241/32 from=192.168.101.2 metric=2 timeout=2m37s
63 R dst-address=20.20.25.242/32 from=192.168.101.2 metric=2 timeout=2m37s
64 R dst-address=20.20.25.243/32 from=192.168.101.2 metric=2 timeout=2m37s
65 R dst-address=20.20.25.244/32 from=192.168.101.2 metric=2 timeout=2m37s
66 R dst-address=20.20.25.245/32 from=192.168.101.2 metric=2 timeout=2m37s
67 R dst-address=20.20.25.246/32 from=192.168.101.2 metric=2 timeout=2m37s
68 R dst-address=20.20.25.247/32 from=192.168.101.2 metric=2 timeout=2m37s
69 R dst-address=20.20.25.248/32 from=192.168.101.2 metric=2 timeout=2m37s
70 R dst-address=20.20.25.249/32 from=192.168.101.2 metric=2 timeout=2m37s
71 R dst-address=20.20.25.250/32 from=192.168.101.2 metric=2 timeout=2m37s
72 R dst-address=20.20.25.251/32 from=192.168.101.2 metric=2 timeout=2m37s
73 R dst-address=20.20.25.252/32 from=192.168.101.2 metric=2 timeout=2m37s
74 R dst-address=20.20.25.253/32 from=192.168.101.2 metric=2 timeout=2m37s
75 R dst-address=20.20.26.0/24 from=192.168.101.2 metric=3 timeout=2m37s
76 R dst-address=20.20.29.0/24 from=192.168.101.2 metric=2 timeout=2m37s
77 R dst-address=20.20.29.250/32 from=192.168.101.2 metric=2 timeout=2m37s
78 R dst-address=20.20.29.251/32 from=192.168.101.2 metric=2 timeout=2m37s
79 R dst-address=20.20.29.252/32 from=192.168.101.2 metric=2 timeout=2m37s
80 R dst-address=20.20.29.253/32 from=192.168.101.2 metric=2 timeout=2m37s
81 R dst-address=20.20.100.0/24 from=192.168.101.2 metric=3 timeout=2m37s
82 R dst-address=20.20.101.0/24 from=192.168.101.2 metric=3 timeout=2m37s
83 R dst-address=20.20.102.0/24 from=192.168.101.2 metric=4 timeout=2m37s
84 R dst-address=20.20.103.0/24 from=192.168.101.2 metric=4 timeout=2m37s
85 R dst-address=20.20.104.0/24 from=192.168.101.2 metric=3 timeout=2m37s
86 R dst-address=20.20.106.0/24 from=192.168.101.2 metric=4 timeout=2m37s
87 R dst-address=20.20.109.0/24 from=192.168.101.2 metric=5 timeout=2m37s
88 R dst-address=20.20.111.0/24 from=192.168.101.2 metric=5 timeout=2m37s
89 R dst-address=20.20.150.0/24 from=192.168.101.2 metric=3 timeout=2m37s
90 R dst-address=20.20.200.0/24 from=192.168.101.2 metric=3 timeout=2m37s
91 R dst-address=192.168.100.0/24 metric=1
92 R dst-address=192.168.100.103/32 metric=1
93 R dst-address=192.168.100.106/32 metric=1
94 R dst-address=192.168.101.0/24 metric=1
95 R dst-address=192.168.200.1/32 metric=1
 
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Re: Crazy Issue

Thu Dec 22, 2022 2:01 pm

The route is coming from 192.168.101.2
0 R dst-address=20.0.0.0/8 from=192.168.101.2 metric=3 timeout=2m37s
(R = rip)

check that device...
 
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Re: Crazy Issue

Thu Dec 22, 2022 2:04 pm

The route is coming from 192.168.101.2
0 R dst-address=20.0.0.0/8 from=192.168.101.2 metric=3 timeout=2m37s
(R = rip)

check that device...

On same way you can find who send that route, until you find what device cause the problem.
Thank you . We just used the commands you mentioned at this 192.168.101.2 machine and this route does not exist ( even there) . Could it be some "ghost" route casued by some software issue ? Would you recommend us to fully reset?

Thank you for your time.
 
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Re: Crazy Issue

Thu Dec 22, 2022 2:07 pm

Paste all the result of those 4 on that device:

/ip route export

/ip route print terse where dst-address=20.0.0.0/8

/routing rip export

/routing rip route print terse
 
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Re: Crazy Issue

Thu Dec 22, 2022 2:16 pm

Paste all the result of those 4 on that device:

/ip route export

/ip route print terse where dst-address=20.0.0.0/8

/routing rip export

/routing rip route print terse
The IP route export results:
/ip route
add distance=1 gateway=pppoe-static1 routing-mark=to_static1_pool9
add disabled=yes distance=1 gateway=pppoe-OTE routing-mark=to_pool2
add disabled=yes distance=1 gateway=192.168.101.1 routing-mark=to_pool3
add distance=1 gateway=pppoe-********* routing-mark=to_pool4
add distance=1 gateway=pppoe-********* routing-mark=to_pool5
add distance=1 gateway=20.20.21.1 routing-mark=to_pool6
add distance=2 gateway=pppoe-static1
add comment=3rdBackup_Route disabled=yes distance=2 gateway=pppoe-*********
add comment=ROUTE_for_UNMS distance=1 dst-address=192.168.100.172/32 gateway=192.168.101.1

The ip router print terse DOES NOT have any 20.0.0.0/8 as route record

The routing rip export:

/routing rip interface
add send=v1-2
/routing rip network
add network=20.20.0.0/16
add network=20.20.1.16/28
add network=20.20.100.0/24
add network=192.168.101.0/24

The Routind rip Route print tersi results:

0 R dst-address=20.20.0.0/24 metric=1
1 R dst-address=20.20.1.16/28 metric=1
2 R dst-address=20.20.1.48/29 metric=1
3 R dst-address=20.20.1.64/27 from=20.20.1.52 metric=2 timeout=2m48s
4 R dst-address=20.20.21.0/24 metric=1
5 R dst-address=20.20.21.219/32 metric=1
6 R dst-address=20.20.21.220/32 metric=1
7 R dst-address=20.20.21.221/32 metric=1
8 R dst-address=20.20.21.222/32 metric=1
9 R dst-address=20.20.21.223/32 metric=1
10 R dst-address=20.20.21.224/32 metric=1
11 R dst-address=20.20.21.225/32 metric=1
12 R dst-address=20.20.21.226/32 metric=1
13 R dst-address=20.20.21.227/32 metric=1
14 R dst-address=20.20.21.228/32 metric=1
15 R dst-address=20.20.21.229/32 metric=1
16 R dst-address=20.20.21.230/32 metric=1
17 R dst-address=20.20.21.231/32 metric=1
18 R dst-address=20.20.21.233/32 metric=1
19 R dst-address=20.20.21.234/32 metric=1
20 R dst-address=20.20.21.235/32 metric=1
21 R dst-address=20.20.21.236/32 metric=1
22 R dst-address=20.20.21.237/32 metric=1
23 R dst-address=20.20.21.238/32 metric=1
24 R dst-address=20.20.21.239/32 metric=1
25 R dst-address=20.20.21.240/32 metric=1
26 R dst-address=20.20.21.241/32 metric=1
27 R dst-address=20.20.21.242/32 metric=1
28 R dst-address=20.20.21.243/32 metric=1
29 R dst-address=20.20.21.244/32 metric=1
30 R dst-address=20.20.21.245/32 metric=1
31 R dst-address=20.20.21.246/32 metric=1
32 R dst-address=20.20.21.247/32 metric=1
33 R dst-address=20.20.21.248/32 metric=1
34 R dst-address=20.20.21.249/32 metric=1
35 R dst-address=20.20.21.250/32 metric=1
36 R dst-address=20.20.21.251/32 metric=1
37 R dst-address=20.20.21.252/32 metric=1
38 R dst-address=20.20.21.253/32 metric=1
39 R dst-address=20.20.24.0/24 metric=1
40 R dst-address=20.20.24.235/32 metric=1
41 R dst-address=20.20.24.236/32 metric=1
42 R dst-address=20.20.24.237/32 metric=1
43 R dst-address=20.20.24.238/32 metric=1
44 R dst-address=20.20.24.239/32 metric=1
45 R dst-address=20.20.24.240/32 metric=1
46 R dst-address=20.20.24.241/32 metric=1
47 R dst-address=20.20.24.242/32 metric=1
48 R dst-address=20.20.24.243/32 metric=1
49 R dst-address=20.20.24.244/32 metric=1
50 R dst-address=20.20.24.245/32 metric=1
51 R dst-address=20.20.24.246/32 metric=1
52 R dst-address=20.20.24.247/32 metric=1
53 R dst-address=20.20.24.248/32 metric=1
54 R dst-address=20.20.24.249/32 metric=1
55 R dst-address=20.20.24.250/32 metric=1
56 R dst-address=20.20.24.251/32 metric=1
57 R dst-address=20.20.24.252/32 metric=1
58 R dst-address=20.20.24.253/32 metric=1
59 R dst-address=20.20.25.0/24 metric=1
60 R dst-address=20.20.25.240/32 metric=1
61 R dst-address=20.20.25.241/32 metric=1
62 R dst-address=20.20.25.242/32 metric=1
63 R dst-address=20.20.25.243/32 metric=1
64 R dst-address=20.20.25.244/32 metric=1
65 R dst-address=20.20.25.245/32 metric=1
66 R dst-address=20.20.25.246/32 metric=1
67 R dst-address=20.20.25.247/32 metric=1
68 R dst-address=20.20.25.248/32 metric=1
69 R dst-address=20.20.25.249/32 metric=1
70 R dst-address=20.20.25.250/32 metric=1
71 R dst-address=20.20.25.251/32 metric=1
72 R dst-address=20.20.25.252/32 metric=1
73 R dst-address=20.20.25.253/32 metric=1
74 R dst-address=20.20.26.0/24 from=20.20.21.1 metric=2 timeout=2m51s
75 R dst-address=20.20.29.0/24 metric=1
76 R dst-address=20.20.29.250/32 metric=1
77 R dst-address=20.20.29.251/32 metric=1
78 R dst-address=20.20.29.252/32 metric=1
79 R dst-address=20.20.29.253/32 metric=1
80 R dst-address=20.20.100.0/24 from=20.20.1.20 metric=2 timeout=2m36s
81 R dst-address=20.20.101.0/24 from=20.20.1.22 metric=2 timeout=2m51s
82 R dst-address=20.20.102.0/24 from=20.20.1.52 metric=3 timeout=2m48s
83 R dst-address=20.20.103.0/24 from=20.20.1.52 metric=3 timeout=2m48s
84 R dst-address=20.20.104.0/24 from=20.20.1.20 metric=2 timeout=2m36s
85 R dst-address=20.20.106.0/24 from=20.20.1.20 metric=3 timeout=2m36s
86 R dst-address=20.20.109.0/24 from=20.20.1.20 metric=4 timeout=2m36s
87 R dst-address=20.20.111.0/24 from=20.20.1.20 metric=4 timeout=2m36s
88 R dst-address=20.20.150.0/24 from=20.20.1.52 metric=2 timeout=2m48s
89 R dst-address=20.20.200.0/24 from=20.20.21.1 metric=2 timeout=2m51s
90 R dst-address=192.168.101.0/24 metric=1

Thank you.
 
User avatar
rextended
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Re: Crazy Issue

Thu Dec 22, 2022 4:44 pm

Some ghost rule?
¯\_(ツ)_/¯
Try to reboot both devices...
 
smartnetworks
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Posts: 18
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Re: Crazy Issue

Thu Dec 22, 2022 6:22 pm

Some ghost rule?
¯\_(ツ)_/¯
Try to reboot both devices...
Of coarse i did several times... :D - It seems that full reset and config from scratch is the only solution. :(
 
controlc
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Re: Crazy Issue

Fri Dec 23, 2022 11:05 am

What happens if you change your rip interface to only send v2 routes, not v1 & v2?
/routing rip interface
add send=v2
 
smartnetworks
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Re: Crazy Issue

Wed Jan 11, 2023 11:10 pm

Hi , to all and happy new year! Fighting with this continues. As an updated what we did:
1) We disabled V1-2 rip ( as "controlc" user adviced) but no luck .
2) We even changed the router (192.168.101.2 ) as hardware with new one too!! by taking export files from previous one menus peace by peace. Guess what...( no luck!)
3) Then we totally reset the device in which appears the 20.0.0.0/8 and did just 2 steps. We added the 192.168.101.1/24 as an ip to ether8 interface and activate the rip to 192.168.101.0/24 range. Guess what...20.0.0.0/8 appeared instantly again!!
4) At the device which feed the 20.0.0.0/8 ( the 192.168.101.2/24) this route doesn't exist anywhere. There are only addresses under the 20.20.0.0/16 range. We even checked up to 75 routers connected on it ( in case some route is distributing by these) but dead end! Oh...also none of the 75 routers has this 20.0.0.0/8 route in its routing table as dynamic route. They have th 20.20.0.0/16 as it should. This f***ing route appears only to 192.168.101.1 device coming from 192.168.101.2 as source ( where doesn't exist) .

We will continue the 'fight" and will keep you updated. Thank you all for your help!
 
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felixhappy
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Re: Crazy Issue

Mon Jan 30, 2023 11:59 am

Hi smartnetworks,

this sounds very much like a RIP classfull / classless configuration issue, see https://www.oreilly.com/library/view/ip ... 05s04.html

Therefore to summarize:
RIPv1 / RIP version 1 is classfull, therefore 20.x.z.y is in Class A (0.0.0.0 to 127.255.255.255) and has a default subnetmask of /8. Any classfull routing protocol will advertise this network with /8. Class definition is written down 1981 in RFC 791.

You have to use a classless routing protocol utilizing CIDR, defined 1993 in RFC 1518 and RFC 1519.

RIPv2 / RIP version 2 is a classless routing protocol. I am pretty sure, that at least one of your routers is operating in RIP version 1, and therefore announcing it with the default class A subnet mask /8. Upgrade / reconfigure all routers to RIP version 2, and this issue will vanish.

Please also note that a maximum hop-count of 15 is allowed for RIP. If you say that you have more than 75 routers in your network, you may also have other issues with RIP. You are not allowed to have more than 15 routing hops from one end of the network to the other in the chain, otherwise you may experience connectivity issues. Routing Hop count 16 in the network eliminates the route and is used to kill a route if a network goes down by RIP for faster convergence. I recommend to use OSPF on MikroTik for 75 routers, maybe even start to establish areas. It will provide you with way faster convergence.

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