mailing list archives
RE: FTTH CPE landscape
From: Nathan Eisenberg <nathan () atlasnetworks us>
Date: Thu, 4 Aug 2011 20:54:23 +0000
Why? As long as it can be a transparent router, why would it need to be
Layer 2 CPE capability is a big deal, especially if you're doing unrouted multicast (see many TV/VoD over ethernet
platforms for details). But it's also nice for handing the customer a layer-2 service port like they're used to
getting, if they want it that way. The routing engine in CPE's is often simply not as capable as the bridging
mechanism, so there's an end-user experience to consider.
It's also worth noting that this feature will probably become less important as IPv6 and DHCP6-PD becomes more widely
deployed. Until then, the extra routing in IPv4 starts to chew up some serious address space if you're rolling out
thousands or more of the CPEs. See most national ISP's CPE configuration if you think it's unusual to want to hand off
services on a bridged interface- it's not, at all.