Hi
We have two RB1100AHx2 routers. The one in main office works fine, but the other one in one of our factories has a strange problem. It is configured as follows:
Ethernet Interfaces:
ether1: 192.168.125.103/25, connect to factory 2 LAN
ether6: 172.27.3.1/24, connected to wireless link (Ubiquity PowerStation 5)
Related Route:
192.168.0.0/16 via 172.27.3.2
On the other end of the above-mentioned wireless link, we have a RB951Ui-2HnD configured as follows:
Ethernet Interfaces:
ether2: 192.168.124.202/25, connected to factory 1 LAN
ether3: 172.27.3.2/24, connected to wireless link (above)
Related Route:
192.168.125.0/25 via 172.27.3.1
The problem is that when we ping 192.168.124.202 (and any clients inside factory 1 LAN) from inside 1100 board, it replies very well, but when we ping 192.168.125.103 (or any clients inside factory 2 LAN), there is absolutely no reply! Both routers are gateways for LANs on their sides. Setup is extremely simple. We tested another RB1100 (purchased from another local vendor) and had exactly the same problem. Similar configurations work great on other sites with RB1100, RB750 series and even on the above-mentioned 951 board linked wirelessly to a 750 board.
Any ideas?
I am a bit confused with the overlapping prefix routes on the LAN 2 side, 192.168.0.0/16 via wireless and 192.168.125.0/25 connected, although the largest fitting mask should be selected…
I would suggest that you start /tool sniffer on both devices and observe the ping packet flowing. Usually that pinpoints the problem, just make sure to set the filter-interface to all to see if the packet goes wrong link
First thanks for your reply.
Every mentioned route is part of configuration on its corresponding router (first route is on 1100, second is on 951). The reason for 192.168.0.0/16 is that this network is part of a very large network which I administer a small part of it. 951 routes unknown 192.168 addresses to our office, which subsequently routes unknown ones to our holding headquarters.
Anyway, I will give a try based ob your suggestion and post results.
Tested your suggestion. Results:
On 951 side, started both packet sniffer and ping towards 1100 LAN interface, received many timeouts, found packets originating from 951 towards 1100 in sniffer results, but no reply.
On 1100 side, started packet sniffer with ping from 951 continuing, didn’t find even one icmp packet!!!
Interface set to all in filter settings. Any ideas?!
Seems like a problem with the wireless link, probably it doesn’t deliver packets in the 951 → 1100 direction.
What about other types of traffic, do you have any connectivity?
Yesterday we found out that problem was from PowerStation 5 radio at 1100 side. I don’t know why, but it acts as a router and not a bridge (although it is configured in bridge mode!). Anyway, because 1100 connection to our main office is more important than anything, we solved it by connecting above-mentioned 1100 to office 1100 using a PPTP connection and adding default route.