What Eric said.
Except, I believe you said the two links were of unequal capacity. OSPF
can't natively load balance unequal paths. If you set them to equal
cost, you'll actually get 2x the capacity of the smaller link, and the
larger link will be underutilized. There was a trick somebody posted
here a few weeks ago where you create a set of VLAN's on each path and
do equal cost load balancing on the VLAN's instead of the real paths.
Basically if one path was 3x bigger than the other, then create 3x as
many VLAN's on that path.
I haven't tried it yet....seems plausible though.
------ Original Message ------
From: "Eric Kuhnke" <[email protected]>
To: "[email protected]" <[email protected]>
Sent: 12/30/2016 6:00:25 PM
Subject: Re: [AFMUG] Mirotik help - dual backhauls and bridges
Hit enter too soon. If you want two parallel PTP links between two
sites, sharing traffic equally. Assuming both radio links are identical
equipment and identical speed capability. Set the same OSPF cost on the
router interfaces both ends.
This is logically the same thing as putting two routers next to each
other in a test lab environment, and running two patch cables between
them in an OSPF area 0, equal cost path configuration.
On Fri, Dec 30, 2016 at 2:58 PM, Eric Kuhnke <[email protected]>
wrote:
You should not be extending layer 2 switch fabrics over PTP microwave.
One router at each site.
Each router gets a /32 OSPF loopback address.
One OSPF /30 per radio link.
The only MAC addresses that should exist on the radio link (which is
itself a L2 bridge) are the single MACs for the router interfaces on
each end.
On Fri, Dec 30, 2016 at 12:50 PM, Ty Featherling
<[email protected]> wrote:
I have my network setup with a common bridge (bridgeWAN) setup on
each router in an area. The backhaul in goes into this bridge and any
backhauls to further sites do as well. OSPF sorts out the default
path and the bridge gets them there in one IP hop. I have a major
site that I am added a second backhaul link to the upstream direction
today (Airfiber 5x multiplexer for the win). I am trying to figure
out how to bond these two backhauls from bridgeWAN on router A to
bridgeWAN on router B. Any way to share the load across those links
would be great. If I just plug them in spanning tree shuts one down.
The real kink in the works may be that they have different
capacities. What can I do?
-Ty
