newbie default route question

RouterOS Beginner Basics
1

Hi All

I’m having a problem setting a default route between 2 RB450G devices.

I have one router(A) connected to the internet. Another router(B) also connects to this router(A).

At router(B) I am unable to set a default route to a specific IP address on routerA. All I can do is set the routes interface. What am I doing wrong?

Some detail -

RouterA
Internet Port (eth4) - 192.168.0.254/24
Router(B) Port (eth5) - 10.1.0.1/24 - connects to routerB eth1

RouterB
RouterA Port (eth1) 10.2.0.1/24 - connects to routerA eth5

I can create a static default route on RouterA to my DSL modem and RouterOs shows..
DAS 0.0.0.0/0 gateway 192.168.0.1 reachable eth4-temp-internet
and all is well on routerA.

On routerB I try to create a similar default route to routerA but routerOs shows…
A 0.0.0.0/0 gateway 10.1.0.1 unreachable
I have added a static route to 10.1.0.0/24 using interface eth1.

How do I get a default route setup on routerB to point to routerA.

2

/ip route add dst-address=0.0.0.0/0 gateway=10.1.0.1 distance=1

that should do the trick. Also make sure to check the firewall on router A if you have entered any rules.

Edit: Can you ping and telnet from RouterB to RouterA (that is, do you have full access)?

3

You would have thought that this would do the job, but the default gateway from routerB to routerA remains unreachable! I can ping the interface 10.1.0.1 on routerA from routerB and I can ping 10.2.0.1 on routerB from routerA.

I needed to encrypt this link so what I did was setup IPSEC security between 10.1.0.1 and 10.2.0.1. Then an EOIP tunnel on this ‘link’ , created addresses on each router in the same subnet and then added a default gateway over the EOIP tunnel.

I still cant understand why I was not able to create a default route from routerB from routerA? Can some clever soul explain it in words not exceeding 2 syllables please?

4

Hi,

You kind of forgot to mention the tunnel :slight_smile: Anyway, I’d suggest that you try to telnet from RouterA to RouterB to make sure that normal IP traffic can traverse the link without any problems.

Marcus

5

Sorry I didn’t mention the tunnel as I thought that I could build the tunnel after getting the routers to talk to each other.

The routers ping each other without problems.

If I connect a client(PC) to routerA(10.1.0.1) I cannot ping/telnet/etc anything on/via routerB(10.2.0.1).
If I connect a client(PC) to routerB(10.2.0.1) I cannot ping/telnet/etc anything on/via routerA(10.1.0.1).

This has to be telling me something but I don’t know what :frowning: As the routers will talk to each other via ICMP(ping) is my problem with firewall rules?

6

I believe you have some issues with your firewall in that case. For some reason your routers does not forward traffic to the next interface (that is towards next router).