Scenario - connected in this order starting at remote site working towards HQ: (link type indented between routers) Customer Windows workstationSwitch of some sortCisco 28xx router with MTU set 1470 (or close to that I don't remember exactly)-----ethernet cable 100Mb FDX hard setRB951-2n-----UBNT link to shared APx86 MT router-----SAF Lumina BHx86 MT router-----UBNT AF BHx86 MT router-----ethernet cable 100Mb FDX hard setCisco L3 routing switch (don't remember model)HQ Windows server A question about MTU...I have increased the MTU sizes on the equipment which allowed it. I believe the Cisco routers are set to 1470 MTU or something close because packets are all that size when received by us. Backhaul links should allow jumbo packets. Our MT routers have L2 MTU set high - this is actually what the MPLS/VPLS packets use right? I was under the impression that the ethernet interface MTU was just used for IP traffic which has fine connectivity. I can test at the moment had to revert back to eoip tunnel to get it working again. I would very much like to pay someone for their time assisting me setting this up though. Need MPLS on top of our OSPF across the board and we have three edge routers that BGP peer with three upstream providers in three different cities. The sooner I accomplish this the better and at this point I'm asking for help because I don't have the luxury of time. This would be way better for someone to just look at my screen logged into router and check settings themselves... Too many settings on too many devices to type :) Thanks
Scott Carullo Technical Operations 855-FLSPEED x102 ---------------------------------------- From: "Paul Hendry" <paul.hen...@skyline-networks.com> Sent: Saturday, July 13, 2013 4:24 PM To: "Scott Carullo" <sc...@brevardwireless.com>, wireless@wispa.org Subject: Re: [WISPA] Mikrotik MPLS voodoo First stage would be to check the basics. Can both ends of the VPLS tunnel ping each other? Are all interfaces between end points exchanging LDP? Assuming this is all good I suspect an MTU issue so have you got any RB450G, RB493G, older routerboards, etc. in the path? ----- Reply message ----- From: "Scott Carullo" <sc...@brevardwireless.com> To: <wireless@wispa.org> Subject: [WISPA] Mikrotik MPLS voodoo Date: Sat, Jul 13, 2013 21:03 I have rolled out MPLS on about 4 hops on my network with anticipation of expanding that to all towers once the concept proves itself in this small section on the network. I'm having issue getting traffic to pass through VPLS tunnel in real life. In the lab it works, when we played with it in the past it works. I think we are overlooking something - hard to say because we do not have much real world experience dealing with MPLS anomalies. If anyone has rolled out MPLS on top of an OSPF routed network of reasonable size I'd love to pick your brain on a few things... let me know, you can hit me back on list or off. Appreciate it. Scott Carullo Technical Operations 855-FLSPEED x102 -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.
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