[Mikrotik] Connection pauses?

Josh Luthman josh at imaginenetworksllc.com
Mon Sep 27 23:21:22 CDT 2010


I would confirm you can down grade with the other 450.  Configuration isn't
important, Mikrotik has layer 2 connectivity.

I would add r/stp with safe mode first.
On Sep 27, 2010 10:52 PM, "Bill Prince" <part-15 at skylinebroadbandservice.com>
wrote:
> All the RBs are on the same private subnet 10.13.100.x/24, with a
> gateway at 10.13.100.1.
>
> Both of the backhauls are set up for wds-bridge. No firewall rules, no
> NAT. As close to bare metal as you can get.
>
> The RB450 is routing. Ether1 to the upstream (through the two bridged
> radios). Ether2 and ether3 are local. I've enable the switch/master
> between ether2 and ether3. Ether2 goes to a UBNT Rocket5M, and ether3
> goes to a site monitor. I don't seem to be having trouble connecting to
> either of those devices (UBNT and SiteMonitor). I also set up ether5 as
> a local access port with a separate subnet, DHCP server, etc.
>
> When I tested with the laptop, I set it to the same IP as the backhaul
> slave would have been. Everything seemed to work OK. So I am starting
> to believe that there is some weirdness withthe backhauls.
>
> One thing that I've noticed is a tad strange is that the registration
> tab on the backhaul slave shows the backhaul master (the ap-bridge) as
> NOT on WDS. Even though I have set it. See below:
>
>
>
> So maybe this is a glitch with WDS on RC1?
>
> Any clever comments about downgrading RC1 to 4.30? I am pretty sure
> that if I downgrade the slave, I am going to lose the link. It's a
> looooonnng drive out there.
>
>
>
>
>
> bp
>
>
> On 9/27/2010 6:52 PM, Josh Luthman wrote:
>> Are you sure it isn't the backhaul? Some kind of firewall?
>>
>> With your current tests, what's the IP of your laptop, backhauls and the
>> ether1?
>>
>> Josh Luthman
>> Office: 937-552-2340
>> Direct: 937-552-2343
>> 1100 Wayne St
>> Suite 1337
>> Troy, OH 45373
>>
>>
>> On Mon, Sep 27, 2010 at 9:35 PM, Bill Prince<
>> part-15 at skylinebroadbandservice.com> wrote:
>>
>>> Both RB450s seem to talk to my laptop fine. However, I can't really test
>>> it beyond the laptop.
>>>
>>> I've got a new symptom though.
>>>
>>> When I try to ping something upstream (DNS server for example), the
pings
>>> time out.
>>>
>>> So I ran a trace on it while doing this. The trace shows the pings
coming
>>> back!?!? So what's timing out here? There must be something obvious that
I
>>> am missing....
>>>
>>>
>>> bp
>>>
>>>
>>>
>>> On 9/27/2010 5:13 PM, Josh Luthman wrote:
>>>
>>>> If you plug your laptop to the 450 that was there originally, now in
the
>>>> office, using ether1 - does the problem arise? If it does not, you know
>>>> there is an issue with that setup and not the RB.
>>>>
>>>> Having not read the entire thread closely...have you identified where
the
>>>> issue lies? Is it at ether1 on the rb (confirmed with another device
>>>> working in it's place) or some point between?
>>>>
>>>> Josh Luthman
>>>> Office: 937-552-2340
>>>> Direct: 937-552-2343
>>>> 1100 Wayne St
>>>> Suite 1337
>>>> Troy, OH 45373
>>>>
>>>>
>>>> On Mon, Sep 27, 2010 at 7:21 PM, Bill Prince<
>>>> part-15 at skylinebroadbandservice.com> wrote:
>>>>
>>>> Went out to the site today, and (1) swapped cables, and (2) swapped to
a
>>>>> different RB450G.
>>>>>
>>>>> Same O same Oh.
>>>>>
>>>>> While I was out there, I tried locking the interface down to (1) 1000
>>>>> Mbps,
>>>>> and (2) 10 Mbps.
>>>>>
>>>>> It would not work at all at 1000 Mbps (?), and exhibited the same
problem
>>>>> at 10 Mbps.
>>>>>
>>>>> I though perhaps the PWM solar controller in the same box was causing
>>>>> some
>>>>> grief, so I turned off the solar panels. No difference on or off.
>>>>>
>>>>> And I miss-spoke when talking about 1' cables. The jumpers from the
>>>>> power
>>>>> injectors are 1' jumpers, but the cables going up to the radios are
about
>>>>> 10' long (each). So all told, there is about 12' of cable between
ether1
>>>>> on
>>>>> the RB450, and ether1 on the RB433AH (backhaul).
>>>>>
>>>>> I'm sending a photo of the setup. The cables coming in on the right
>>>>> side
>>>>> are the ethernet cables to the backhaul (bottom POE), and AP (top
POE).
>>>>> The
>>>>> white 1' cables go from the backhaul POE (LAN side) to the RB450 POE
>>>>> (also
>>>>> LAN side), then into the ether1 connector on the RB450.
>>>>>
>>>>> I'm wondering if this might be an MTU issue? All the interfaces have
an
>>>>> MTU of 1500. However, most have an L2MTU or 1526, EXCEPT for the
802.11N
>>>>> wireless interfaces, which have an L2MTU of 2290.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> bp
>>>>>
>>>>>
>>>>>
>>>>> On 9/26/2010 4:43 PM, Bill Prince wrote:
>>>>>
>>>>> The behavior with MAC telnet is slightly different. SSH would give me
>>>>>> the "pause", but MAC telnet would disconnect.
>>>>>>
>>>>>> I think I'm going to have to swap the unit to see what gives. Might
>>>>>> also
>>>>>> swap cables.
>>>>>>
>>>>>> Hope I can get it to fail while I'm out there.
>>>>>>
>>>>>>
>>>>>> bp
>>>>>>
>>>>>>
>>>>>> On 9/26/2010 4:33 PM, Scott Reed wrote:
>>>>>>
>>>>>> That was going to be my comment as well.
>>>>>>> Could also be a bad connector or cable, even if short. I would
replace
>>>>>>> the cable with a 10' just to see what happens.
>>>>>>> Also would try to set 10M/Full or 10M/Half to help eliminate a cable
>>>>>>> problem.
>>>>>>>
>>>>>>> What if you MAC telnet in instead of SSH? If it stays up and SSH
>>>>>>> doesn't, it may be an IP problem. If it doesn't stay up, I would
look
>>>>>>> at
>>>>>>> hardware (connector, cable, etc.)
>>>>>>>
>>>>>>>
>>>>>>> On 9/26/2010 1:12 AM, Christopher Tyler wrote:
>>>>>>>
>>>>>>> I know that there is a specified minimum cable length for CAT5
cables.
>>>>>>>> Some sources say 3ft some say 7.5ft. Have you tried a longer cable?
>>>>>>>>
>>>>>>>> Christopher Tyler
>>>>>>>> Total Wireless Communications, LLC
>>>>>>>>
>>>>>>>> On 09/26/2010 12:02 AM, Bill Prince wrote:
>>>>>>>>
>>>>>>>> Locking them both to 100BaseT FDX did not fix it
>>>>>>>>> Since they're both gigabit, maybe I should lock them to 1000BT?
>>>>>>>>>
>>>>>>>>> bp
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On 9/25/2010 9:26 PM, Bill Prince wrote:
>>>>>>>>>
>>>>>>>>> No they are not. Would not expect them to flap, especially
MT-to-MT.
>>>>>>>>>> Also, both sides are showing 100 FD all the time. Just the same,
>>>>>>>>>> it's
>>>>>>>>>> worth a shot.
>>>>>>>>>>
>>>>>>>>>> Cables on this are very short. 1 footers, because the units are
>>>>>>>>>> right
>>>>>>>>>> next to one another.
>>>>>>>>>>
>>>>>>>>>> bp
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On 9/25/2010 7:25 PM, RickG wrote:
>>>>>>>>>>
>>>>>>>>>> Are the ethernet ports locked down to 100Mbps?
>>>>>>>>>>> On Sat, Sep 25, 2010 at 9:04 PM, Bill Prince<
>>>>>>>>>>> part-15 at skylinebroadbandservice.com> wrote:
>>>>>>>>>>>
>>>>>>>>>>> That sounded like a good idea, so I made both (the RB433 and the
>>>>>>>>>>>
>>>>>>>>>>>> RB450)
>>>>>>>>>>>> arp entries static. No help.
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> bp
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> On 9/25/2010 5:33 PM, Mike Lyon wrote:
>>>>>>>>>>>>
>>>>>>>>>>>> Sounds like you are losing an arp entry somewhere. What
backhaul
>>>>>>>>>>>>
>>>>>>>>>>>>> radio are
>>>>>>>>>>>>> you using? I've seen this behavior with ubnt before...
>>>>>>>>>>>>>
>>>>>>>>>>>>> -mike
>>>>>>>>>>>>>
>>>>>>>>>>>>> On Sep 25, 2010 5:20 PM, "Bill Prince"<
>>>>>>>>>>>>> part-15 at skylinebroadbandservice.com>
>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>> Let me correct that. When I was at the remote site, I plugged
my
>>>>>>>>>>>>> laptop
>>>>>>>>>>>>> into ether5, and it seemed normal. I put "enough" of the basic
>>>>>>>>>>>>> config
>>>>>>>>>>>>> into
>>>>>>>>>>>>> it so that I could access it from the NOC.
>>>>>>>>>>>>>
>>>>>>>>>>>>> It's when I kept getting disconnected from it (from the NOC)
that
>>>>>>>>>>>>> I
>>>>>>>>>>>>> resorted
>>>>>>>>>>>>> to logging into it from the adjacent backhaul radio. When I'm
>>>>>>>>>>>>> SSHed
>>>>>>>>>>>>> into
>>>>>>>>>>>>> it, I don't get disconnected, but I get these pauses.
Sometimes
>>>>>>>>>>>>> short,
>>>>>>>>>>>>> sometimes long.
>>>>>>>>>>>>>
>>>>>>>>>>>>> I can actually run Winbox on it, as long as I have the SSH
>>>>>>>>>>>>> running
>>>>>>>>>>>>> the
>>>>>>>>>>>>> outbound ping.
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> bp
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> On 9/25/2010 4:55 PM, Bill Prince wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>> Don't know. This is a remote POP, and there are 3 ...
>>>>>>>>>>>>>
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>>>>>>>>>>>>>
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>>>>>>>>>>>>> Mikrotik mailing list
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>>>>>>>>>>>>>
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>>>>>>>>>>>>>
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>>>>>>>>>>
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