Okay.  That was what I was expecting.  Unless I'm reading what Chris wrote 
wrong, that didn't happen to the CCR.  It happened to the Edge router (I think 
he said it was an Imagestream).  Replacing the CCR didn't change that and the 
replacement (x86?) was very slow until he rebooted the Edge.

I agree with not messing around with it.  That's why we're ordering a 
replacement today for the CCR that we have one of our edge connections right 
now.

From: Af [mailto:[email protected]] On Behalf Of Rory 
Conaway via Af
Sent: Thursday, September 25, 2014 11:59 AM
To: [email protected]
Subject: Re: [AFMUG] CCR-1036 fun with PPPoE

Sorry, I'd have to get my network admin in on this to be more specific.  We 
didn't have BGP on our routers.  I can only tell you the symptoms that I was 
aware of.  CPU utilization went to the roof, remote access was really, really 
slow, and users had high-latency or were dropping connections and this usually 
occurred within 24-48 hours.  I know we didn't do a lot of trouble-shooting, 
just went back to 6.15 since that was stable on everything else we had.  We 
didn't mess around with it much.

Rory

From: Af [mailto:[email protected]] On Behalf Of 
James Howard via Af
Sent: Thursday, September 25, 2014 9:54 AM
To: [email protected]<mailto:[email protected]>
Subject: Re: [AFMUG] CCR-1036 fun with PPPoE

I'm a bit confused.  What symptoms did you see with your routers?  What I got 
from Chris' description was that the CCR caused his Edge router to bomb.  
Replacing the CCR didn't fix the problem until they rebooted the Edge router.  
Did your routers cause other routers to degrade or crash?

I'm not sure about there being an issue with 6.19 on the CCR but I can tell you 
that we saw a similar situation with a CCR that had 6.17 (or possibly older, 
not sure when we updated it) recently.  I would suspect that he's having an 
issue with BGP on the CCR.  In our case, the CCR had 2 full BGP tables, PPPOE 
and OSPF on it.  It took down one of the BGP peers on the Edge router 
(PowerRouter V3 in our case).  I disabled the BGP peer on the Edge for about 5 
minutes and everything worked happily.  When I started it back up, everything 
was fine until it randomly happened again.  We then shut down the BGP link 
between the PowerRouter and the CCR.  The CCR does not seem to be able to 
handle more than one BGP table if it's doing anything else.  Another CCR seems 
to be happy as an edge router with 2 full tables on it.  It's not doing any 
other function though and we are in process of ordering an x86 replacement.

From: Af [mailto:[email protected]] On Behalf Of Rory 
Conaway via Af
Sent: Thursday, September 25, 2014 11:38 AM
To: [email protected]<mailto:[email protected]>
Subject: Re: [AFMUG] CCR-1036 fun with PPPoE

No, our needs are much simpler but we saw similar issues on 5 routers from 
750's to 1100's.  Went back to 6.15 and haven't had a problem in 3 weeks.

Rory

From: Af [mailto:[email protected]] On Behalf Of 
Chris Wright via Af
Sent: Thursday, September 25, 2014 9:24 AM
To: [email protected]<mailto:[email protected]>
Subject: Re: [AFMUG] CCR-1036 fun with PPPoE

Rory, thanks for your reply. Is your setup fairly similar to ours? PPPoE, 
Accounting, and BGP all done by the Mikrotik? How many sessions do you have and 
what kind of throughput?

Chris Wright
Velociter Wireless<http://www.velociter.net/>

From: Af [mailto:[email protected]] On Behalf Of Rory 
Conaway via Af
Sent: Thursday, September 25, 2014 7:16 AM
To: [email protected]<mailto:[email protected]>
Subject: Re: [AFMUG] CCR-1036 fun with PPPoE

On the older routers, we went back to 6.15 and things have been rock solid.  We 
saw similar problems with 6.19.

Rory

From: Af [mailto:[email protected]] On Behalf Of 
James Howard via Af
Sent: Thursday, September 25, 2014 6:39 AM
To: [email protected]<mailto:[email protected]>
Subject: Re: [AFMUG] CCR-1036 fun with PPPoE

Have you tried taking down the BGP session on the Edge router for a couple 
minutes and then restart it?

From: Af [mailto:[email protected]] On Behalf Of Chris 
Wright via Af
Sent: Wednesday, September 24, 2014 5:37 PM
To: [email protected]<mailto:[email protected]>
Subject: [AFMUG] CCR-1036 fun with PPPoE

CCR-1036 running RouterOS 6.19

After some serious amounts of testing, we felt our CCR was ready to take the 
plunge. The core router talks BGP to our two Imagestream Edge routers and gets 
all 500k+ routes from each in about three minutes. Its PPPoE server manages to 
authenticate the bulk of nearly 1800 customers in four minutes. All's fine and 
dandy for about 12 hours, then not so fine and dandy things start happening. 
Overall traffic that should be near 600mbps seems to top off around 400mbps. 
Edge 1 goes unresponsive, VRRP doesn't kick in on Edge 2 and the entire network 
degrades. All devices on our public switch go partially unresponsive to pings 
including our DNS servers, other various VM's, and ESXi hosts themselves.

Here's the fun part: We took the CCR out, just flat out unplugged it and turned 
on our old Core routers. They start authenticating customers but they're 
insanely slow in doing it. It's not until we reboot our Edge 1 router that 
things get back to normal and the old Core routers authenticate at acceptable 
speeds. Could the CCR be inducing a problem in our Edge routers perhaps?


Chris Wright
Velociter Wireless<http://www.velociter.net/>

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