Applicability
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Firmware version: Any
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Model: S-Series
Problem Description
Login Linkus by LCS. But it shows Failed to connect - Error 03
LCS is well activated.
Analysis
The PCAP capture on PBX shows a few ICMP - Destination Unreachable packets.
The error indicates the MTU of the next hop is 1000.
But the 200 OK packet for Login is larger than 1000 Byte.
Solution
Change the MTU from 1000 to 1500 on the Router.
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