LSIS XGL-EFMTB - Specification of Communication Load Amount

Chapter 2 Product Specifications
2-4
2.2.3 Specification of Communication load amount
Communication load amount have two types. One is media interrupt that received every second in
FEnet media, the other is the sending load amount(by link I/F) from CPU to FEnet. If exceeding FEnet
granted media interrupt load amount and sending load amount, it will fail. Make network system to
prevent badly intended DDOS and ARP based attack.
(1) Communication load amount by media interrupt
▶
Load by Frme from media
▶ Diagnose load by packet
▶ FEnet module’s max load amount by media interrupt(Server operation standard)
XGL-EFMT/EFMF: about 1200 packets/sec
XGL-EFMTB/EFMFB: about 5,000 packets/sec
(5,000 packets/sec means moment load amount. For example 600 packets(or more)
per 100ms makes problem)
▶ How to check:XG5000->[Online]-> [set communication module]-> [system diagnosis]
-> [media information] -> [packet/sec]
▶
Symptoms of FEnet module when exceeding max load amount: communication error,
diagnosis service error, connection error
▶ If receive block is not set in high speed link parameter, interrupt still occur. It might be
influenced by load amount.
▶ Symptoms of exceeding max load amount: set communication period in FEnet
module which high speed link transmission is set longer than previous set period.
ex)20ms → 200ms
(2) XGK/I/R system’s send packets load (Load by link I/F interrupt)
▶ Load by data amount sending CPU module to Communication module
▶ Scan time of CPU module, high speed link service period, P2P setting will choose load amount.
▶ Max available sending(=transmission) block in high speed link of FEnet module considering
Link I/F interrupt
((Sending period/ Max CPU scan time) * 8 blocks)/2 =max sending blocks
▶ Solution when exceeding max send/receive load: Change the RAPIEnet module’s sending
period which high speed link set or Change number of blocks
▶
Max sending blocks considering CPU scan time and high speed link