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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: maximum active vlans in a crisco 6509
Sez "Roeland Meyer (E-mail)" <[email protected]> > > > Bob Biver: Tuesday, June 20, 2000 7:28 PM > > the docs say max 250, is this informational or a limit of > > spanning tree? The docs say 1000, actually. http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/sw_5_5/cnfg_ gd/vlans.htm#xtocid225297 I'd worry if you plan on having more than 100 STP instances on a switch; if you're doing single-port VLANs, do yourself a favor and disable STP for those VLANs. > > also, > > is anyone running more than 250 ? There's probably someone doing it somewhere. > If I recall correctly, that's also real close to the maximum > number of physical connections to the chasis, with all modules > installed. Personally, I've never run anywhere near that number. It's possible to have 384 FE connections in a single Cat6509 today. I do it frequently, but not with each in a different VLAN. > I don't think it is useful to have less than 2 members in a vlan. You forget that the routing module (aka MSFC) might be the other member, not counting as a physical port. > You would also be surpassing the bandwidth limitations of that > chasis, even if all the connections were 100baseTX. Oversubscribed by 20%. In reality, a Cat6509 doing end-user aggregation, loaded to the hilt with 10/100 ports, will rarely see 10% utilization. S | | Stephen Sprunk, K5SSS, CCIE #3723 :|: :|: Network Design Consultant, HCOE :|||: :|||: 14875 Landmark Blvd #400; Dallas, TX .:|||||||:..:|||||||:. Email: [email protected]
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