6.1 - DHCP problem

RouterOS General
1

RB2011LS
Upgrade to 6.1 and have DHCP troubles:
Router normal boot and work. After 1-2 days DHCP system fails:

1. DHCP-client writes many errors to log:
22:53:29 dhcp,error dhcp-client on ether1-gateway failed to add IP address 192.168.12.150: already have such address (6)

2. DHCP-server hangs, no answer to clients, no displayed configs in winbox

3. CPU load - 100%

After reboot - all ok for 1-2 days.
6.0 havnt such problems.

2

Same problem with RB951G-2HnD (6.1)

3

Same problem with CCR1016-12G. I have sent this letter to support@mikrotik.com:
DHCP client on CCR get IP address from optical modem Huawei
Modem is working as a bridge with DHCP relay service.
IP address was received by DHCP client expires every 30 min.
There are two bugs periodically:
1-st situation:
After 30 minutes DHСP client tries to get IP address without removing the previous. If new IP address is the same as the old, we have the following bugs:

[user @ # CCR]> log pr
22:42:12 dhcp, error dhcp-client on 1-idnet3 failed to add IP address XXX.XXX.XXX.XXX
9: already have such address (6)

[user @ # CCR]> ip dhcp-client pr
Flags: X - disabled, I - invalid

INTERFACE USE ADD-DEFAULT-ROUTE STATUS ADDRESS

0 1-idnet3 no no error

After removing this IP address manually, dhcp client works correctly.

2-nd situation:
DHCP client does not release the previous address, and creates a new one on the same interface. As a result, there are two addresses: the previous and the new.
Of course data transfer is stopping.

4

Hmm, 403 forbidden. :slight_smile:

Forbidden

You don’t have permission to access /share/index.php on this server.

Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request.

5

fixed the link http://mikrotik.com/download/share/all_files_6.2rc1.zip

6

6.2rc1
Winbox - DHCP server - Networks tab - not visible and corrupt contents

7

hm, works for me. can you show screenshot?

8

4.gif
5.gif
6.gif

9

6.2rc
100% CPU load, PPP routing hangs, reboot

too many problems with 6.1-6.2, most unstable mikrotik firmware ever seen
now planning downgrade to 6.0, may be 5

10

Same DHCP problem with CCR1016-12G. Critical issue for us, but won’t install 6.2rc1 if we are going to get even more trouble. Our CCR1016-12G is a production router providing service to a large amount of clients, and has lot of stuff (PPTP, BGP, policy routing, balancing, etc.).

Can’t we get a 6.1 with just DHCP stuff fixed? Everything else as it is right now. PLEASE!

11

Downgraded to 6.0, feels fine.

12

Sorry for stealing the thread, but I recently also had to downgrade to 6.0 from 6.1 because IPSec stopped working. 6.0 - OK, after upgrade to 6.1 - not working, after downgrade to 6.0 - everything works again.

I agree that it’s really unstable nowadays :frowning:

13

6.2rc1
100% load :laughing:
4.gif

14

6.2rc1

Adding a host to the walled garden ip list using winbox crashes the winbox session all the time. Adding it via terminal works ok.

15

interface
1.gif

16

Same thing on 751G-2hnd with 6.1. All tabs in interface is cleared. Downgrade to 5.25.

17

More from here. 6.1:

  1. Cannot add DHCP server… at all
  2. DHCP Client sometimes fails when lease runs out.
    -Doesn’t renew the address until you press the DHCP Clients window in Winbox
    -When it gets new address, old one is not removed and you ought to remove it manually.
18

6.1 Client on RB2011 works just great…

I get these all the time, new address gets assigned but the dynamic address does not get updated or second IP is added…

19

The problem is now solved???

20

Can anyone just help me to configure my mikrotik rb450g as dhcp relay..? when it is connected to a isp modem..