ARP ping yes, but no ping

RouterOS General
1

I have an RB493G with winbox 5.11
The ports I focused are:
eth1: LAN, switch connected. IP Range 172.26.0.0/24
eth2: router 4g with address 192.168.1.12

In mikrotik have two bridges, now they aren’t used.
All eth is in bridge1 but eth5 is in bridge2

mikrotik addresses are:
172.26.0.4/24 in bridge1
192.168.1.8 in bridge1
192.168.49.2/24 in bridge2 , this address is not used

The facts:
In my computer, in the lan, I have two ips one for each subnet. I can ping with no problems all devices: all mikrotik address, router 4g, and others devices in lan with 172.26.0.0 and 192.168.1.0
In router 4g I can ping mikrotik and others 192.168.1.0/24 devices, no problems.
But in mikrotik I can only ping my computer, 192.168.1.20. If i ping router 4g, or any other, it returns timeout.
And the ARP pings do it right in the mikrotik with every device.

I really lost. For me it’s a nonsense. Hope you can help me. Thank you in advance.

2

Some ideas, please.

3

Yours is a rather odd setup, looks like you have config leftovers.

First thing I’d do is upgrading it to latest bugfix release, 6.36.4, check System > Routerboard and check Current firmware version is the same as Upgrade Firmware, click Upgrade otherwise. Reboot.

Save an export just in case, open a New Terminal and issue:

export file=PreviousConfig

Transfer Previousconfig.rsc to your desktop.

I’m assuming only devices connected to that router is the LAN switch, and the 4G router.

I’d reset to no defaults, then config it from scratch; all you need is:

Assign ether1 172.26.0.4/24
Assign ether2 192.168.1.8/24

Set default gateway (check previous config)

That’s all you need for that router to forward and route appropiately.

However, to be safer than sorry, it would be better for you to post the PreviousConfig.rsc here before you carry out any of my suggestions, so that I can assess if you would need any additional settings.

What services is that router providing?

4

Thank you very much. Now I’m on holidays, but I’ll do it as soon as possible. The mikrotik is used in production for iscsi connection and for proxy web. So for that I have to be careful with it.

5

Post a wiring diagram along with IP addressing of all devices relying on the mikrotik router.

6

Here is the wiring diagram.

7

please post an export, and the output of

/ip route print

Are you sure the 4G router responds to pings (i.e. no firewall enabled)?

8

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 0.0.0.0/0 172.26.0.12 1
1 X S 0.0.0.0/0 192.168.49.1 1
2 ADC 172.26.0.0/24 172.26.0.4 bridge1 0
3 ADC 192.168.1.0/24 192.168.1.8 bridge1 0
4 ADC 192.168.49.0/24 192.168.49.2 bridge2 - WAN 0

For sure the ping to 192.168.1.1, for example, responds to my computer but not for the mikrotik.
Thank you.