Dear guys,
I have just posted this problem but anyone help me. I have a bridged network with one RB433AH configure in AP-bridge and 90/100 clients configure in station-pseudobridge; sometimes, one mikrotik client freeze entire network (wireless still connected, but I could not ping router behind mikrotik clients and then all network is freeze (no traffic)): the only way to resolve problem is disconnect this client. All mikrotik clients have ver 4.5 or 4.4 of RouterOS and AP has ver.4.11.
If i perform a network sniffing I find a lot of broadcast generate from radio MAC-ADDRESS of CPE that generate problem but with sender IP address that is ip address of gateway and not ip address of router behind CPE (see attachment).
If I connect a Windows PC behind one mikrotik client I have error “duplicate IP address” and if, I disconnect mikrotik client that generate “duplicate IP address”, all network go up. Why? Could you help me please?
I have just try to:
upgrade router OS to ver 4.11 of mikrotik client that generate problem
reset and reconfigure mikrotik client
change router behind mikrotik client
change MAC-ADDRESS of wlan1 of mikrotik client that generate problem
Disable default forwarding on AP and on access-list of AP
but I don’t resolve problem. You can find other information on those posts:
Convert from a bridged network to a routed network and you won’t have issues with broadcast storms or clients interfering with one another on layer 2 like you’re seeing. It’s a lot of work, but it is also the only true solution to your problem rather than slapping band aids on. Bridged networks don’t scale. When in doubt, route.
Our network has more or less 1000 CPE divided in 10/11 networks configure in routing mode. I have this problem only from three months and in two networks where there is mikrotik AP and mikrotik CPE. I don’t have problem in network where there are Alvarion AP and Alvarion CPE.
I’m the one who started the first thread you started, http://forum.mikrotik.com/t/bad-cpe-bringing-down-entire-network/39894/1 After this issue and testing 4.13 with nv2 that doesn’t work with pseudobridge, I’m looking again about how I can convert to a routed cpe. I have customers with static, public IP’s in their routers, so I have to figure out how to route this somehow, but with this issue and the nv2 issue, I’m thinking pseudobridge isn’t a great way to go.
I hope that Mikrotik support or someone resolve this strange issue: I think that it is a RouterOS problem on station-pseudo-bridge, because if configure bad CPE with station-wds all works OK.
Dear guys!
Today, after a storm, I have same problem: two mikrotik CPE block entire layer2 network. I sniff traffic and problem is same: duplicate IP address…
Please upgrade to RouterOS v5.4 as we have fixed a small bug in the bridge.
Also I would suggest to migrate to the station-bridge mode which we made to make the configuration more easy and more correct: http://wiki.mikrotik.com/wiki/Manual:Wireless_Station_Modes
Just had another storm, problem is back. What is strange is that it is the exact same customer who is getting others ip numbers again. Last time we replaced the radio, very strange. Anyway, I just upgraded that customer to 5.5, turned the ethernet back on and it got someone else ip address again. I’m now in the process of upgrading the entire AP and customers to 5.5 and will move to station-bridge. Hope that helps.
Upgraded every cpe and ap to 5.5, set every radio to station-bridge, same problem.
Last time I swapped out the radio and it fixed it, why it happened to the exact same customer, I’ll never know. I’m pretty sure we swapped out their router last time also. Funny thing is I see other customers radios, not their dhcp address in the registration table of the AP under last ip.
We are going to go swap out the router again later today, maybe the radio also, we’ll see.
