[OFF TOPIC] Moderator, might want to split this off.
[Moderator note: Weaver's questions about QoS, split off from another topic.]
Q1. Could someone tell me about QoS in a straight modem ? (Including a modem-router set in modem-only mode.) This is what, observance of L2 priority markings ? You would need something that L2-marks ethernet PDUs - be it the original sending machine or a router - in order to realise any benefit. If a host doesn’t L2-mark the ethernet PDUs that it sends, then the only way I can see any benefit being realised is if the router can L2-mark PDUs going out according to some general heuristic rules which involve snooping at L3 or L4; eg. spotting TCP ACKs and L2- and also possibly L3-marking those PDUs as higher priority, or else perhaps involves spotting certain TCP/UDP port values.
Q2. Does QoS even work in a straight modem that is not acting as a router? To be able to work, the modem would have to do deep PDU inspection- looking into PPPoE, PPP, IPv4/v6, then say TCP or UDP headers. Is that right?
I’m also wondering if this might be one of the many features/options/settings that you can play with on a modem-router even when it’s in straight modem mode yet despite the fact that the features appear to be available according to the UI, they don’t actually work at all while in straight modem mode.
