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Speed and duplex setting????

i want to know about Normal link puls(NLP) and FLP...

which basic mechanisum used by switch for negotiation of speed and duplex matching?1

2 REPLIES
Community Member

Re: Speed and duplex setting????

For starters try this link. This is from a Cisco perspective.

http://www.cisco.com/en/US/customer/products/hw/switches/ps700/products_tech_note09186a00800a7af0.shtml

Or look up IEEE 802.3u for 10/100 or, 802.3z for gigabit.

VIP Purple

Re: Speed and duplex setting????

Hello,

as I understand it, NLP is just a basic Ethernet connectivity check used for 10BaseT (non-autonegotiate) devices, while FLP is an enhanced version of NLP, used in autonegotiation. Whenever autonegotiation is involved, FLP's are being sent. When a FLP capable device detects NLP's from a 10BaseT device, it stops sending FLP's and reverts to NLP's.

Check the following document for a detailed explanation:

Advanced Ethernet: Understanding link, auto-negotiation and auto-sense

http://inetd.com/CriticalNetworks/resources/index.html

HTH,

GP

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