nanog mailing list archives

Re: Multi-gigabit edge devices as CPE


From: Mark Tinka <mark.tinka () seacom mu>
Date: Mon, 13 Apr 2015 00:23:12 +0200



On 13/Apr/15 00:15, Hamish McGlinn wrote:

The ACX series is more of a hybrid. They are probably more likened to
Layer 2 routers than switches. They are primarily designed as Mobile
backhaul devices where integration into existing IP MPLS
infrastructure would be a cost saving and design advantage. You can
see this with the other models that have the TDM (E1/T1) interfaces.
Those models use SAToP and CESoPSN to move TDM based circuits over an
MPLS network. It's all rather clever really. The Ethernet ports on
those models as well as the ethernet only models are an extension of
that. They provide layer 2 interfaces where you don't really require
layer 3 services (such as ethernet based mobile backhaul). So they are
a switch, yes, but more than that. They utilise MPLS L2VPN/L2Circuits
to move ethernet over the MPLS infrastructure. Hence why I thought it
could be an alternative to terminating the layer 3 at the edge.

What you're referring to are the ACX500 through to the ACX4000 units.

The ACX5000 (5048 and 5096, respectively) are Metro-E switches (IP/MPLS
routers, really). Unlike the other ACX models, they do not come with any
non-Ethernet ports.

Mark.


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