3 ms·
When I had CenturyLink, I replaced the ONT via a JTAG cable on the new ONT. The stock CL ONT (Calix 716GE-I R2) had a 16384 connection limit, which prevented me
by neelc 2y ago
When I had CenturyLink, I replaced the ONT via a JTAG cable on the new ONT. The stock CL ONT (Calix 716GE-I R2) had a 16384 connection limit, which prevented me from running high-bandwidth Tor relays. The new ONT (Calix 803G) did not.
Calix for some reason makes it easy to clone some models.
I have a post on this: https://www.neelc.org/posts/clone-calix-ont/ https://www.neelc.org/posts/clone-calix-ont/
Now I'm in NYC with Verizon Fios where I don't need a cloned ONT. Woo! The Verizon ONT is big and has a huge power brick, presumably because of RFoG alongside GPON.
- ImSorryButWho 2y agoThat's very cool, but just to point out: that's not JTAG, it's serial (UART). JTAG is a much lower level protocol, typically used for hardware or low-level software debugging. Serial/UART gives you a command-line interface to the software that's running. Using a JTAG interface is a lot more complicated. If you're interested in playing with it, check out OpenOCD.
- muppetman 2y agoHow is the ONT, a Layer2/Ethernet device, involved in L3 sessions? Was it also the default gateway/router all rolled up into one?
- neelc 2y agoThere is a mis-feature on the ONT called "Broadcom Packet Flow Cache". It apparently speeds up TCP sessions but at the expense of allowing a large amount of then. Lumen fortunately moved off these ONTs. However, the new Smart NIDs have their fair share of issues from what I heard. I moved out of Lumen territory so have no experience with them.
- bauruine 2y agoConsumer routers are all extremely limited when it comes to many connections. Even an Ubiquiti UDM Pro only allows 65536 by default.