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4000 Gig Module oversubsciption

This involves the 4000 gig module part number WS-X4418-GB. I've reviewed the documention on oversubscribing the gig ports on this modules but I still don't fully understand it. Can someone explain it in simple terms? Are the 16 ports divided into groups of four or eight? Does each group allow for 1 or 2 Gbps full duplex? The documentation distinguishes between burst rates and average rates - how is this controlled and at what point are packets dropped?

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New Member

Re: 4000 Gig Module oversubsciption

Unfortunately Cisco isn't as open about the architecture of the Cat4K series as they are on the Cat6K series.

Each slot has 6Gbps (12Gbps in marketing numbers) into the switching fabric. The WS-X4418-GB has two ports each with a dedicated 1Gbps channel, and the remaining 4Gbps are shared amongst the remaining 16 ports. The 16 ports are grouped such that four ports share a 1Gbps channel.

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/inst_nts/gmdcf_nt.htm#45942

http://www.cisco.com/warp/customer/cc/techno/lnty/etty/ggetty/prodlit/1092_pp.htm

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