The EPC considers itself to have one virtual Ethernet port, with one or more physical ports attached to it. You can’t have, say, physical port 1 on the EPC accepting bearer tunnels while port 2 outputs customer data on vlan 20, port 3 outputs different customer data on vlan 21, and so on.
You should be able to have the EPC plugged into one trunk port on your switch, with the vlans then broken out by the switch into separate ports heading further upstream, though. The official Telrad method of eliminating the EPC as a point of failure, as far as I can tell, is to have multiple EPCs. I’m not sure, off hand, what methods the eNBs support to determine which EPC use; i.e. always use the primary unless it’s gone, straight round robin, etc. From: [email protected] [mailto:[email protected]] On Behalf Of Jeremy Austin Sent: Sunday, November 20, 2016 1:02 PM To: [email protected] Subject: Re: [Telrad] Issues On Sun, Nov 20, 2016 at 2:13 AM, Nathan Anderson <[email protected]> wrote: Which again leaves us at square one as far as explaining what is going on, but at least we now have a working solution. So, huzzah for that. Ever since moving the EPC trunk port to a different port on our LTE core router, I have been able to do 60Mbit/s single-stream TCP tests to UEs that are multiple hops out on our microwave backbone. I have NEVER been able to accomplish this before, much less consistently. I think that using the word "giddy" here to explain our disposition ever since we made this discovery would be a vast understatement. It is always a relief to finally isolate problems like this. We experienced something very odd when we moved an EPC from being directly connected to a router to being connected via a switch, with separate ports for bearer, management, and PDN. Even with no overlapping port VLANs on the switch, the EPC refused to work when connected via a switch, and we had to consolidate VLANs to one port. Apparently that was an unsupported configuration. We'll do a LAG for all trunks when that is available. In a perfect world we could do multiple LAGs, one to each of two separate switch/router combos, to eliminate SPOF… -- Jeremy Austin (907) 895-2311 (907) 803-5422 [email protected] Heritage NetWorks Whitestone Power & Communications Vertical Broadband, LLC Schedule a meeting: http://doodle.com/jermudgeon
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