Visitor
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1 Message
DLINK Switch Faulty
I am formally requesting a Level 2 escalation regarding a hardware failure in the building's managed network infrastructure. Over the past 6 months, I have observed persistent network instability characterized by severe Packet Reordering and TCP Retransmissions on multiple hardware devices.
Wireshark Analysis Findings:
A packet capture on an idle connection (no active user traffic) consistently shows:
A packet capture on an idle connection (no active user traffic) consistently shows:
- 7,508+ TCP Out-of-Order segments: Confirming a sequencing failure at the Data Link Layer (Layer 2).
- 9,046+ Duplicate ACKs / 1,710 Fast Retransmissions: Indicating severe packet loss and buffer saturation.
- 178 TLS "Record fragment length" Errors: Evidence that the managed gateway or unit switch is clipping/fragmenting encrypted traffic.
Local Hardware Verification:
- Scope: The issue affects multiple computers connected via Ethernet, ruling out device-specific NIC or driver failures.
- Unit Switch: The in-unit managed switch is a D-Link DGS-1100-08V2.
- Bypass Failure: A direct connection to the wall jack results in a complete loss of internet connectivity, indicating that the building gateway is MAC-locked to the specific D-Link switch. I am unable to bypass this potentially faulty hardware to stabilize my connection.
Request for Action:
Given the data, this is not a standard signal (Layer 1) issue but a hardware logic failure or duplex mismatch within the managed infrastructure.
Given the data, this is not a standard signal (Layer 1) issue but a hardware logic failure or duplex mismatch within the managed infrastructure.
- Please escalate this ticket to the NOC or a Senior Network Engineer to inspect the managed port configuration for my unit.
- I request a physical replacement of the in-unit D-Link DGS-1100-08V2 switch and a reset of the MAC binding on the building's distribution layer.
XfinityThomasA
Official Employee
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3.3K Messages
17 hours ago
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EG
Expert
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116.1K Messages
3 hours ago
@user_742z83 @XfinityThomasA
Please circle back here and post any possible solutions for the issue here in these open public forums so that all readers here may benefit from the exchange / info. This is in keeping with the spirit for which these public help forums were originally intended. Thank you.
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