Router Freezes

Hi,

I have the following application running on a mikrotik router.

  1. configured 5 bridges
    2.each bridge is having two interfaces.
  2. 2 of the 5 bridges are being used.
  3. Following is the connection pattern on the two used bridges.
    ISP1----bridge1------Gateway_router_ISP1—NAS,CMTS,L-3_switch etc.—Customers
    ISP2----bridge2------Gateway_router_ISP2—NAS,CMTS,L-3_switch etc.—Customers
  4. This mikrotik box is doing bandwidth control in transparent bridge mode.

The system freezes and it stops responding after 2-3 days.

The Hardware:
Intel Server board containing two no. of Xeon Quad Core CPU and 2GB of RAM.
ROS version running:
3.13
we have tried 3.24,3.28 same result.
same hardware is doing bandwidth control in routed mode it is running fine for several months at another ISP which was also supplied by us.

Important Observation:

  1. Whenever the router hung, it was found that something was being done on winbox–taking export, moving queues, adding mangle rules etc.
  2. Even on the hardware that is running fine for last three months doing BW control in routed mode, when we are doing policy routing using mangles, the system freezes after 2-3 days.
  3. In no load condition, the bridge mode-hardware is running for a month.
  4. I have monitored the contrack table it is 2Lac something wheras the maximum entry is 5 Lac something.
  5. memory available is around 1.7 GB almost always
  6. CPU utilization is varying very steadily from 15%-30% throughout the day depending on the traffic load.


    Can anybody give any clue for this?


    Also attaching the export
    Mikrotik_export_output.txt (60.2 KB)
    -Sudipta

hmmm… isn’t 15-30% too high for 8-CPU system?..

just my 2c ))

p.s. try v4.3 to be completely sure %)

Dear Chupaka,

What is normal for a 8 CPU system? I had the idea that we may grow till 50% at least.

Also have you tried 4.3 in multi cpu environment?

Thanks and Regards,

Sudipta Kr. Pal

Today Ihave fone through the following topic.
http://forum.mikrotik.com/t/bug-v3-1x-prerouting-chain-mangle-freezes-router/25607/1
I think my case is also similar. It is the pre-routing mangle rules those are not being handled properly in the software.

-Sudipta