Network & Infrastructure
A dual-stack application connects successfully but stalls when returning a larger response over IPv6. Small probes pass, leading the incident team to suspect the server instead of path-size feedback.
IPv6, TCP & Transport Engineering2 นาทีในการอ่าน
อ่านบทความ : IPv6 PMTU black holes behind an ICMPv6 filter
Network & Infrastructure
Hosts keep a valid global IPv6 address after losing their default route. Address validity and router availability are governed by different advertised lifetimes and should not be treated as one state.
IPv6, TCP & Transport Engineering2 นาทีในการอ่าน
อ่านบทความ : IPv6 default-router lifetime versus prefix lifetime
Network & Infrastructure
A cloned virtual machine fails to activate its expected IPv6 address. Its interface is up, but duplicate address detection reports a conflict or the address remains tentative.
IPv6, TCP & Transport Engineering2 นาทีในการอ่าน
อ่านบทความ : IPv6 duplicate address detection after VM cloning
Network & Infrastructure
Monitoring reports every STALE IPv6 neighbor as an outage even while traffic works. An incident response then clears caches unnecessarily and increases neighbor-discovery load.
IPv6, TCP & Transport Engineering2 นาทีในการอ่าน
อ่านบทความ : IPv6 neighbor states: STALE is not the same as FAILED
Network & Infrastructure
A site stretches one IPv6 subnet across several buildings to avoid changing addresses during moves. The resulting shared neighbor domain increases the impact of loops and discovery faults.
IPv6, TCP & Transport Engineering2 นาทีในการอ่าน
อ่านบทความ : Plan IPv6 subnet boundaries without extending one LAN everywhere
Network & Infrastructure
A long-distance transfer uses only a fraction of link capacity despite low packet loss. The receiver's effective window may be smaller than the bandwidth-delay product.
IPv6, TCP & Transport Engineering2 นาทีในการอ่าน
อ่านบทความ : TCP window scaling and a high-bandwidth path that stays slow
Network & Infrastructure
A network team investigates retransmissions while the receiver repeatedly advertises a zero window. The connection may be blocked by the consuming application rather than a congested network.
IPv6, TCP & Transport Engineering2 นาทีในการอ่าน
อ่านบทความ : TCP zero-window pauses caused by application backpressure
Network & Infrastructure
Duplicate acknowledgments and retransmissions increase after an ECMP change. Some apparent loss events may originate from packet reordering rather than packets disappearing from the network.
IPv6, TCP & Transport Engineering2 นาทีในการอ่าน
อ่านบทความ : Separate TCP reordering from true loss in packet analysis
Network & Infrastructure
A packet capture suggests the server takes hundreds of milliseconds to respond, while endpoint telemetry reports low network RTT. Capture location, batching and application delay may explain the discrepancy.
IPv6, TCP & Transport Engineering1 นาทีในการอ่าน
อ่านบทความ : TCP RTT measurements and misleading capture timing
Network & Infrastructure
A team enables ECN to reduce congestion loss, but some flows stall or never show marking. Endpoint negotiation and every relevant congestion point need separate verification.
IPv6, TCP & Transport Engineering2 นาทีในการอ่าน
อ่านบทความ : ECN validation across a mixed queueing path
Network & Infrastructure
A tunnel carries small web requests but loses large responses. Clamping TCP MSS can help selected connections while leaving UDP, existing sessions and the underlying MTU mismatch unresolved.
IPv6, TCP & Transport Engineering2 นาทีในการอ่าน
อ่านบทความ : TCP MSS clamping: scope and limitations in a tunneled network
Network & Infrastructure
Users report that a modern web application works slowly on one network despite ordinary HTTPS tests passing. QUIC may be blocked and the client may be using a fallback transport.
IPv6, TCP & Transport Engineering2 นาทีในการอ่าน
อ่านบทความ : QUIC blocked by UDP policy while HTTPS over TCP succeeds