Very well said … goes back to where I always suggest folks to build relationships with Cisco, Juniper, Brocade or whomever – they will tell you this stuff and tailor to your requirements.
It very well accepted that oversubscribing of cards/ports is common .. some usage scenarios permit this to work and others don’t. From: Af [mailto:[email protected]] On Behalf Of Eric Kuhnke Sent: Friday, January 15, 2016 10:09 AM To: [email protected] Subject: Re: [AFMUG] Weird Problem with download Not necessarily - one needs to be familiar with the hardware specs on the particular Cisco platform one is using. It's possible to 2:1 or 4:1 oversubscribe the 10GbE ports on each linecard in a 6500/7600 series if you configure it a certain way. Legacy 6500 stuff is 8Gbps per slot but you can have a 16-port GBIC linecard. Or encounter a setup like a 48-port 1000BaseT card that is on a 32Gbps backplane bus. Other things like a 7206VXR with NPE-G1 and PA-GE modules can do line-rate GbE on the three routing engine GBICs, but each PA-GE is more like a 600 Mbps interface. Same with Juniper on many platforms. When using a mature platform they're usually on the 3rd, 4th or 5th generation of linecards and supervisors that mate with a particular chassis and backplane. It's very useful to do some research into the technical specs and limitations of the 1st/2nd generations to learn how the platform evolved into its current mature state. On Fri, Jan 15, 2016 at 6:19 AM, Erich Kaiser <[email protected] <mailto:[email protected]> > wrote: I agree there is a huge price difference between a Mikrotik and a Juniper/Cisco/Brocade router, but you also need to look at the facts. Those routers are made to support a Full routed 10Gbps/40Gbps/100Gbps of throughput per port. With Mikrotik it is a MAYBE it will if I don't do this or do that.. Obviously there are many models out there, but if you look at the true carrier grade router lines, it is a full routed port. I think each one has its place. Just my opinion.. Erich Kaiser North Central Tower [email protected] <mailto:[email protected]> Office: 630-621-4804 Cell: 630-777-9291 On Fri, Jan 15, 2016 at 7:37 AM, Mike Hammett <[email protected] <mailto:[email protected]> > wrote: The #1 thing I learned at NANOG was that the big vendors are just as full of shit as the little vendors. Cisco, Juniper, AlcaLu, etc. are all just as likely to ignore problems and create bugs as Mikrotik, Ubiquiti, etc. When sitting at a table at about 1 AM one night with a head engineer with one international operator and one national operator I said something to the effect of, "I've just largely been listening to you guys comparing notes on different products and issues you've had. I use Mikrotik routers in my network and people often say they are junk and that Cisco, Juniper, etc. are the way to go. Those vendors are exactly who you guys use and yet here you are with the same type of complaints as we have with our vendors." The one at the international vendor chimed in, "and we pay 10x more for that right." Don't lose sight of that. For example, Cisco is known for having Ethernet chipset incompatibility issues.... which is exactly what this sub-topic has been about. To think otherwise is simply blind arrogance. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com <https://www.facebook.com/ICSIL> Midwest Internet Exchange http://www.midwest-ix.com _____ From: "Eric Kuhnke" <[email protected]> To: [email protected] Sent: Thursday, January 14, 2016 10:49:12 PM Subject: Re: [AFMUG] Weird Problem with download This is sort of an illustration of why I am still very wary of Mikrotik for routers. There's a myriad of Cisco routers available with 12 to 20 SFP-based GbE interfacess (used/refurb) that are just as capable, if somewhat bigger and hotter, that run very stable versions of IOS. It's totally unacceptable for Cisco to break basic functionality for $HUGE_ISP and $HUGE_ENTERPRISE_CUSTOMER , which are usually using the same IOS trains I use for service provider functions. Mikrotik OS software support is pretty much "hey go over to this forum and hope somebody answers your question", if something is broken you are just supposed to wait for a new version release in a month or two. If something is fundamentally broken in a version of IOS used by a mature (6+ year old) Cisco platform it's almost certain that somebody much bigger and more important than yourself has already run into the issue, escalated it with Cisco, and a new build fixing the bug is available. If the space and power are available I would much rather have a 6503E with dual supervisor than a CCR.... On Wed, Jan 13, 2016 at 7:34 PM, Rory Conaway <[email protected]> wrote: This just gets even better. Worked 24 hours, then breaks again. Up to Level 4 tech support. Rory From: Af [mailto:[email protected]] On Behalf Of Rory Conaway Sent: Wednesday, January 13, 2016 7:56 AM To: [email protected] Subject: Re: [AFMUG] Weird Problem with download We are taking it to the Mikrotik forum. This makes no sense since we have 12 of the already running with no issues. Rory From: Af [mailto:[email protected]] On Behalf Of Glen Waldrop Sent: Wednesday, January 13, 2016 7:54 AM To: [email protected] Subject: Re: [AFMUG] Weird Problem with download I’m not terribly happy with ROS since 6.29. Maybe it’s just still not 100% yet. From: Rory Conaway Sent: Tuesday, January 12, 2016 8:36 PM To: [email protected] Subject: Re: [AFMUG] Weird Problem with download Replaced the Mikrotik routers with an Airrouter, it works. Replaced with an Edgerouter, still works. This goes under the category of WTF. Rory From: Af [mailto:[email protected]] On Behalf Of Rory Conaway Sent: Monday, January 11, 2016 9:13 PM To: [email protected] Subject: Re: [AFMUG] Weird Problem with download We tried 3 Mikrotik routers, 2 cable modems, and two radios from two different manufacturers. Rory From: Af [mailto:[email protected]] On Behalf Of Glen Waldrop Sent: Monday, January 11, 2016 8:52 PM To: [email protected] Subject: Re: [AFMUG] Weird Problem with download MTU? Last time I had that problem was an inconsistent Ethernet connection. It wasn’t showing errors, but UDP was dropping packets. TCP retransmitted. UDP was screwy, but TCP was downloading at the limit of the wireless feed. From: Rory Conaway Sent: Monday, January 11, 2016 9:47 PM To: [email protected] Subject: Re: [AFMUG] Weird Problem with download Nailed the problem down to the Mikrotik router having a problem with DNS caching whether it’s Cox or Google. Not sure where to go from there since the other 12 don’t have a problem. Rory From: Af [mailto:[email protected]] On Behalf Of Rory Conaway Sent: Monday, January 11, 2016 4:44 PM To: [email protected] Subject: Re: [AFMUG] Weird Problem with download We had raons bit no dangling cables. Level 3 says no errors to the modem and we had a tech out already. We are changing the 2011 to a 450 just to confirm before we eacalate further. Rory Conaway Triad Wireless Typed on my phone with one finger so please excuse typos and abbreviations. -------- Original message -------- From: That One Guy /sarcasm <[email protected]> Date: 1/11/2016 10:38 AM (GMT-07:00) To: [email protected] Subject: Re: [AFMUG] Weird Problem with download If it just started and youre in an area hit by storms, some of the neighbors, mostly the empty houses with no tenants at this point, cable was busted down by tree limbs and is dangling terminated byt the mud now On Mon, Jan 11, 2016 at 10:58 AM, Glen Waldrop <[email protected]> wrote: Likely an RF issue on the cable side. I see this sort of thing with the company I consult for. They’ll have me going through the router, trying to shut down the “virus” or peer to peer when it is thousands and thousands of retransmits and broken packets. Just like our wireless it can have good quality until loaded, then watch the quality drop to nearly nothing and loose connection. From: Rory Conaway Sent: Sunday, January 10, 2016 8:25 PM To: [email protected] Subject: Re: [AFMUG] Weird Problem with download The Netgear router has nothing to do with it, I was just using their website as an example of downloading a file. It’s computer, 2011, cable modem, the world. I just can’t download anything from any sites. What’s weird is they just drop. Rory From: Af [mailto:[email protected]] On Behalf Of Ken Hohhof Sent: Sunday, January 10, 2016 5:12 PM To: [email protected] Subject: Re: [AFMUG] Weird Problem with download You mention Netgear, is this a Netgear router? They used to have a problem with downloads stalling, but that was quite a few years ago. The fix was to disable SPI Firewall. From: Rory Conaway Sent: Sunday, January 10, 2016 6:06 PM To: [email protected] Subject: [AFMUG] Weird Problem with download We have a cable circuit that can do everything except download. There is a Mikrotik router between the computer and the cable modem. Haven’t tested taking the router out yet but we have tried 2 routers, same results. Basically, downloads either don’t start or start and then just crash. Game machines can’t update, even downloading a 20MB file from netgear fails. Everything else seems to work. Any ideas would be helpful. Rory Conaway • Triad Wireless • CEO 4226 S. 37th Street • Phoenix • AZ 85040 602-426-0542 [email protected] www.triadwireless.net “Life is full of unfair calls, missed plays, and bad catches. But true baseball players keep on playing” - Lessons from Baseball -- If you only see yourself as part of the team but you don't see your team as part of yourself you have already failed as part of the team. <https://www.facebook.com/ICSIL>
