I want to setup a basic 9 port router where all subnets can pass routed traffic
This is on a MikroTik RB493G 9-port gigabit routerboard running RouterOS v5.26
I setup the following interfaces and routes:
MikroTik RouterOS 5.26 (c) 1999-2013 http://www.mikrotik.com/
[admin@MikroTik] > ip address print
Flags: X - disabled, I - invalid, D - dynamic
ADDRESS NETWORK INTERFACE
0 10.101.28.1/24 10.101.28.0 ether2
1 10.140.28.1/24 10.140.28.0 ether3
2 10.131.28.1/24 10.131.28.0 ether4
3 10.135.21.1/24 10.135.21.0 ether5
4 10.120.21.1/24 10.120.21.0 ether6
5 10.123.21.1/24 10.123.21.0 ether7
6 10.122.110.1/24 10.122.110.0 ether8
7 10.129.110.1/24 10.129.110.0 ether9
8 10.201.0.19/16 10.201.0.0 ether1
[admin@MikroTik] >
[admin@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 10.201.0.1 1
1 ADC 10.101.28.0/24 10.101.28.1 ether2 0
2 S 10.101.28.0/24 10.101.28.1 1
3 ADC 10.120.21.0/24 10.120.21.1 ether6 0
4 S 10.120.21.0/24 10.120.21.1 1
5 ADC 10.122.110.0/24 10.122.110.1 ether8 0
6 S 10.122.110.0/24 10.122.110.1 1
7 ADC 10.123.21.0/24 10.123.21.1 ether7 0
8 S 10.123.21.0/24 10.123.21.1 1
9 ADC 10.129.110.0/24 10.129.110.1 ether9 0
10 S 10.129.110.0/24 10.129.110.1 1
11 ADC 10.131.28.0/24 10.131.28.1 ether4 0
12 S 10.131.28.0/24 10.131.28.1 1
13 ADC 10.135.21.0/24 10.135.21.1 ether5 0
14 S 10.135.21.0/24 10.135.21.1 1
15 ADC 10.140.28.0/24 10.140.28.1 ether3 0
16 S 10.140.28.0/24 10.140.28.1 1
17 ADC 10.201.0.0/16 10.201.0.19 ether1 0
18 S 10.201.0.0/16 10.201.0.19 1
[admin@MikroTik] >
I have unmanaged gigabit switches attached to each interface (9 total) and 2 or 3 hosts connected to each subnet. I also have a FW router connected to the ether1 switch, this FW is the gateway 10.201.0.1
If I connect a system to the ether1 subnet I am able to ping the RB493G at 10.201.0.19, I can also SSh to it just fine.
I can also ping every other RB interface (the remaining 
from the 10.201.0.0/16 subnet host just fine.
So far so good. However I cannot ping any of the RB interfaces from any of the other subnets. For example, ether2 subnet 10.101.28.0/24 hosts can ping other hosts on their subnet but they cannot ping the RB at 10.101.28.1
these 10.101.28.0/24 hosts have the RB interface 10.101.28.1 set as their gateway. These 10.101.28.0/24 cannot ping any other RB interface, but then that makes sense because they are not getting responses from their own RB’s interface.
I get the same behavior from all the other subnets across the other RB interfaces.
Clearly I am missing something basic. Other than setting up the ip interfaces and ip routes I have made no changes to the default configuration of the RB493G
Any suggestions? Do I have to setup VLANS and do a bunch of additional configuration?
I don’t see a way to easily print out my entire system configuration (like Cisco’s “show running-config” command). I suspect the reason would be more obvious if I could see everything that is running.
Thanks for the help,
steve