Re: Vlans - maximum no of devices [7:8128]
Are you running multiple protocols, or just one (IP)? I've read that... when running multiple protocols you should limit your broadcast domain to approximatley 200 hosts. A single protocol domain can support more... (500?). Any thoughts? kelly Quoting Patrick Ramsey : We run about 750-950 computers/printers in each of our vlans. (major facillites) with no performance problems. I couldn't imagine only having 200 devices per vlan. That would be close to 2 subnets in each of our closets. We run on 6509's with POS blades in a full mesh. Broadcasts are not that bad at each facillity. Utilization stays at less than 15% on the LAN and no more than 30% across the WAN links. -Patrick CCB 06/14/01 12:55AM I have to agree, I would not personally put more than around 200 devices in a broadcast domain and that is pushing it. If it is possible I would break it into two or more VLANS and route between the VLANS, this help out in the performance arena. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Hire, Ejay Sent: Tuesday, June 12, 2001 6:19 AM To: [EMAIL PROTECTED] Subject: RE: Vlans - maximum no of devices [7:8128] The theory behind it is this. Would you, in a preplanned network deployment, put over 250 devices in the same Broadcast domain? -Original Message- From: John Kale [mailto:[EMAIL PROTECTED]] Sent: Tuesday, June 12, 2001 5:45 AM To: [EMAIL PROTECTED] Subject: Vlans - maximum no of devices [7:8128] hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=9592t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Vlans - maximum no of devices [7:8128]
Congratulations on passing! However, it is wise to distinguish between Cisco's answers and the Truth :- Chuck -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of William E. Gragido Sent: Wednesday, June 13, 2001 4:16 PM To: [EMAIL PROTECTED] Subject:RE: Vlans - maximum no of devices [7:8128] Each Vlan can accomadate 254 with each switch accomadating a max of 256 devices...its was on my Switching exam todayI passed ;-) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Chris Haller Sent: Tuesday, June 12, 2001 6:46 PM To: [EMAIL PROTECTED] Subject: Re: Vlans - maximum no of devices [7:8128] If I remember correctly, each VLAN is it's own subnet. And therefore, if each vlan is it's own subnet, you can only have 254 devices attached to each subnet. You may wanna check that on CCO. --- John Kale wrote: hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. [EMAIL PROTECTED] = Chris from Chicago MasterCNE, 5.x CNE, ICNE, 4.x CNE, CCNA, MCP __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/ Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8717t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Vlans - maximum no of devices [7:8128]
I don't remember this specific question, and this may be the 'Cisco' answer, but... A VLAN is a broadcast domain. As such, one can have as many devices as their IP addressing (or other protocol) scheme will allow within the limitations of the MAC/CAM table of the switch and the ARP table of the router. This is at least 1K and I think is 8K on the 5500 per VLAN. In addition, there are over 1000 VLANs available on the Cat5500/6500 platform, not counting the hidden ones. So, technically, one could get really big numbers - much bigger than 'the right answer.' In practice, with NetBIOS services, a max of 200 nodes per broadcast domain is advised, and performance can start to drop at the 30 VLAN level. Your experience may vary. ;) --- Chuck Larrieu wrote: Congratulations on passing! However, it is wise to distinguish between Cisco's answers and the Truth :- Chuck -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of William E. Gragido Sent: Wednesday, June 13, 2001 4:16 PM To: [EMAIL PROTECTED] Subject: RE: Vlans - maximum no of devices [7:8128] Each Vlan can accomadate 254 with each switch accomadating a max of 256 devices...its was on my Switching exam todayI passed ;-) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Chris Haller Sent: Tuesday, June 12, 2001 6:46 PM To: [EMAIL PROTECTED] Subject: Re: Vlans - maximum no of devices [7:8128] If I remember correctly, each VLAN is it's own subnet. And therefore, if each vlan is it's own subnet, you can only have 254 devices attached to each subnet. You may wanna check that on CCO. --- John Kale wrote: hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. [EMAIL PROTECTED] = Chris from Chicago MasterCNE, 5.x CNE, ICNE, 4.x CNE, CCNA, MCP __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/ [EMAIL PROTECTED] = Robert Padjen __ Do You Yahoo!? Spot the hottest trends in music, movies, and more. http://buzz.yahoo.com/ Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8772t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Vlans - maximum no of devices [7:8128]
Remember that in a switched environment the issues change from a non-switched network. The problem with collisions almost disappears and the issue becomes broadcasts. When an end-node receives a broadcast it shuttles the packet up the stack and the NIC issues an interrupt. The problem with large numbers of broadcasts has less to do with the switch's bandwidth capacity and more to do with the workstation/server's capacity for handling interrupts. Too many interrupts and your users are going to be VERY unhappy. As far as the switch is concerned, generally speaking, the issue is not how many devices a switch can support locally (after all, we could be hooking 48-port dumb hubs to each 100Mb switch port), but rather how many MAC addresses can be tracked by the switch (on a per port/trunk, module or switch basis depending on hardware). If one builds an extremely large switched network (IBM's campus Xylan network push a few years back comes to mind) it could be possible to overload a switch with MAC addresses from other devices in the broadcast domain(s). Available space for MAC addresses (CAM table etc..) on a per-port basis can also be a limitation, based on hardware. In either case, if one has more devices than the switch/module/port can handle, one will see inconsistent frame delivery between all devices, or complete unreachability of some, depending on switch behavior in a table overflow situation. I'd like to hear what effect might be seen in a network using LANE. Since I haven't worked with it myself I can't say right off hand whether the remote LANE clients will show up in the local CAM table rather than the ATM interface. Anyone have the answer to that one? My $.02, Karen *** REPLY SEPARATOR *** On 6/14/2001 at 12:55 AM CCB wrote: I have to agree, I would not personally put more than around 200 devices in a broadcast domain and that is pushing it. If it is possible I would break it into two or more VLANS and route between the VLANS, this help out in the performance arena. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Hire, Ejay Sent: Tuesday, June 12, 2001 6:19 AM To: [EMAIL PROTECTED] Subject: RE: Vlans - maximum no of devices [7:8128] The theory behind it is this. Would you, in a preplanned network deployment, put over 250 devices in the same Broadcast domain? -Original Message- From: John Kale [mailto:[EMAIL PROTECTED]] Sent: Tuesday, June 12, 2001 5:45 AM To: [EMAIL PROTECTED] Subject: Vlans - maximum no of devices [7:8128] hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8479t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Vlans - maximum no of devices [7:8128]
We run about 750-950 computers/printers in each of our vlans. (major facillites) with no performance problems. I couldn't imagine only having 200 devices per vlan. That would be close to 2 subnets in each of our closets. We run on 6509's with POS blades in a full mesh. Broadcasts are not that bad at each facillity. Utilization stays at less than 15% on the LAN and no more than 30% across the WAN links. -Patrick CCB 06/14/01 12:55AM I have to agree, I would not personally put more than around 200 devices in a broadcast domain and that is pushing it. If it is possible I would break it into two or more VLANS and route between the VLANS, this help out in the performance arena. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Hire, Ejay Sent: Tuesday, June 12, 2001 6:19 AM To: [EMAIL PROTECTED] Subject: RE: Vlans - maximum no of devices [7:8128] The theory behind it is this. Would you, in a preplanned network deployment, put over 250 devices in the same Broadcast domain? -Original Message- From: John Kale [mailto:[EMAIL PROTECTED]] Sent: Tuesday, June 12, 2001 5:45 AM To: [EMAIL PROTECTED] Subject: Vlans - maximum no of devices [7:8128] hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8495t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Vlans - maximum no of devices [7:8128]
Each Vlan can accomadate 254 with each switch accomadating a max of 256 devices...its was on my Switching exam todayI passed ;-) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Chris Haller Sent: Tuesday, June 12, 2001 6:46 PM To: [EMAIL PROTECTED] Subject: Re: Vlans - maximum no of devices [7:8128] If I remember correctly, each VLAN is it's own subnet. And therefore, if each vlan is it's own subnet, you can only have 254 devices attached to each subnet. You may wanna check that on CCO. --- John Kale wrote: hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. [EMAIL PROTECTED] = Chris from Chicago MasterCNE, 5.x CNE, ICNE, 4.x CNE, CCNA, MCP __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/ Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8441t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Vlans - maximum no of devices [7:8128]
But you don't know if you got that particular question correct, do you? Well that all depends on the equipment you're talking about which you never did mention. I'm not going to get too much farther than into this thread, its ridiculous to think that only 254 devices can be supported, etc This just pasted from CCO about the 1900 series switch, a very junior switch. Up to 1024 port-based VLANs with ISL trunking (Enterprise Edition only) I can't find a CCO url quickly but this switch also supports 1024 MACs. If it can support 1024 MACs how many devices do you think that is? No where does it mention that a vlan can have only 254 participants. But of course with only 1024 macs you can't have 1024 vlans with 1024 Macs each, but I don't know what material you're using to study but it seems its outdated. But of course, if you got the question right - that only supports the often stated opinion on this list that many of the exams have errors. Kevin Wigle - Original Message - From: William E. Gragido To: Sent: Wednesday, 13 June, 2001 19:16 Subject: RE: Vlans - maximum no of devices [7:8128] Each Vlan can accomadate 254 with each switch accomadating a max of 256 devices...its was on my Switching exam todayI passed ;-) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Chris Haller Sent: Tuesday, June 12, 2001 6:46 PM To: [EMAIL PROTECTED] Subject: Re: Vlans - maximum no of devices [7:8128] If I remember correctly, each VLAN is it's own subnet. And therefore, if each vlan is it's own subnet, you can only have 254 devices attached to each subnet. You may wanna check that on CCO. --- John Kale wrote: hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. [EMAIL PROTECTED] = Chris from Chicago MasterCNE, 5.x CNE, ICNE, 4.x CNE, CCNA, MCP __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/ Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8447t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Vlans - maximum no of devices [7:8128]
I have to agree, I would not personally put more than around 200 devices in a broadcast domain and that is pushing it. If it is possible I would break it into two or more VLANS and route between the VLANS, this help out in the performance arena. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Hire, Ejay Sent: Tuesday, June 12, 2001 6:19 AM To: [EMAIL PROTECTED] Subject: RE: Vlans - maximum no of devices [7:8128] The theory behind it is this. Would you, in a preplanned network deployment, put over 250 devices in the same Broadcast domain? -Original Message- From: John Kale [mailto:[EMAIL PROTECTED]] Sent: Tuesday, June 12, 2001 5:45 AM To: [EMAIL PROTECTED] Subject: Vlans - maximum no of devices [7:8128] hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8474t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Vlans - maximum no of devices [7:8128]
hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8128t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Vlans - maximum no of devices [7:8128]
The theory behind it is this. Would you, in a preplanned network deployment, put over 250 devices in the same Broadcast domain? -Original Message- From: John Kale [mailto:[EMAIL PROTECTED]] Sent: Tuesday, June 12, 2001 5:45 AM To: [EMAIL PROTECTED] Subject: Vlans - maximum no of devices [7:8128] hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8145t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Vlans - maximum no of devices [7:8128]
I'm gonna take a wild stab at this but I believe 500 ethernet devices is Cisco reccomended amount per VLan. Take that number and confirm it please. Bryan - Original Message - From: John Kale To: Sent: Tuesday, June 12, 2001 5:45 AM Subject: Vlans - maximum no of devices [7:8128] hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8146t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Vlans - maximum no of devices [7:8128]
To all, In Cisco's BCMSN class, they make the comment of 254. I think that Cisco chose this number is because that most people use a /24 mask for subnetting. In BOTH of Cisco's design classes, this is the recommendation: * IP= 500 * IPX = 300 * AT = 200 * Mixed = 200 I think that the design classes make a more accurate guestimate, at least I've seen this true from my consulting experience. However, EVERY network is DIFFERENT--what works for one network won't work for another. I had one customer that had 1,800 devices in the SAME broadcast domain--everything was bridged, not routers. When I first heard this, I didn't believe it. Actually, their network kind of worked. For 30 seconds traffic would go through, and the next 30 seconds they'd have a broadcast storm. It was pretty funny. Of course, they realized one day that when they added another machine to the network, it broke the cycle, and then they decided to redesign their network with routers (which was why I was there). Enjoy! Richard Deal [EMAIL PROTECTED] * CCNA/CCNP test author for www.equizware.com--500 questions each for the CCNA Routing and Switching, CCNP Routing, CCNP Switching, CCNP Remote Access, and CCNP Support tests * Author of the following Coriolis books: CCNP Switching Exam Cram, CCNP Remote Access Exam Prep, and CCNP Cisco Lan Switch Configuration ___ John Kale wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8161t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Vlans - maximum no of devices [7:8128]
That limitation sounds like the number of host in a class C address group. You know, 256 address minus the network address and the broadcast address. There is no limitation, but of courses common sense would tell you that the more workstation contending for the same resource would introduce many problems. But 300 is not too high. From: John Kale Reply-To: John Kale To: [EMAIL PROTECTED] Subject: Vlans - maximum no of devices [7:8128] Date: Tue, 12 Jun 2001 05:45:24 -0400 hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. _ Get your FREE download of MSN Explorer at http://explorer.msn.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8220t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Vlans - maximum no of devices [7:8128]
If I remember correctly, each VLAN is it's own subnet. And therefore, if each vlan is it's own subnet, you can only have 254 devices attached to each subnet. You may wanna check that on CCO. --- John Kale wrote: hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. [EMAIL PROTECTED] = Chris from Chicago MasterCNE, 5.x CNE, ICNE, 4.x CNE, CCNA, MCP __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/ Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8267t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Vlans - maximum no of devices [7:8128]
Chris Haller wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... If I remember correctly, each VLAN is it's own subnet. And therefore, if each vlan is it's own subnet, you can only have 254 devices attached to each subnet. Wrong! What about this? 172.16.2.0 255.255.254.0--this has 510 hosts in it. Enjoy! You may wanna check that on CCO. --- John Kale wrote: hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. Richard Deal [EMAIL PROTECTED] * CCNP test author for www.equizware.com--500 questions each for the Routing, Switching, Remote Access, and Support tests * Author of the following Coriolis books: CCNP Switching Exam Cram, CCNP Remote Access Exam Prep, and CCNP Cisco Lan Switch Configuration ___ Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8269t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Vlans - maximum no of devices [7:8128]
that may be true if your subnet has a subnet mask of /24.. but how big is your subnet if it is subnetted with a /23 so. is it still a subnet? does a vlan have a special subnet? can a vlan subnet have a mask of /23? Kevin Wigle - Original Message - From: Chris Haller To: Sent: Tuesday, 12 June, 2001 19:45 Subject: Re: Vlans - maximum no of devices [7:8128] If I remember correctly, each VLAN is it's own subnet. And therefore, if each vlan is it's own subnet, you can only have 254 devices attached to each subnet. You may wanna check that on CCO. --- John Kale wrote: hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. [EMAIL PROTECTED] = Chris from Chicago MasterCNE, 5.x CNE, ICNE, 4.x CNE, CCNA, MCP __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/ Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8272t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Vlans - maximum no of devices [7:8128]
try 10.10.0.0/16 this 65025 but will the switch be able to handle this i.e.. memory and such D'Wayne Saunders Network Admin Ph:08 89507748 Fax:08 89521112 Mobile: www.lasseters.com.au World's First Government Licensed and Regulated Online Casino... *** This email message (and attachments) may contain information that is confidential to Lasseters Online. If you are not the intended recipient you cannot use, distribute or copy the message or attachments. In such a case, please notify the sender by return email immediately and erase all copies of the message and attachments. Opinions, conclusions and other information in this message and attachments that do not relate to the official business of Lasseters Online are neither given nor endorsed by it. *** -Original Message- From: Richard Deal [mailto:[EMAIL PROTECTED]] Sent: Wednesday, June 13, 2001 09:28 To: [EMAIL PROTECTED] Subject: Re: Vlans - maximum no of devices [7:8128] Chris Haller wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... If I remember correctly, each VLAN is it's own subnet. And therefore, if each vlan is it's own subnet, you can only have 254 devices attached to each subnet. Wrong! What about this? 172.16.2.0 255.255.254.0--this has 510 hosts in it. Enjoy! You may wanna check that on CCO. --- John Kale wrote: hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. Richard Deal [EMAIL PROTECTED] * CCNP test author for www.equizware.com--500 questions each for the Routing, Switching, Remote Access, and Support tests * Author of the following Coriolis books: CCNP Switching Exam Cram, CCNP Remote Access Exam Prep, and CCNP Cisco Lan Switch Configuration ___ Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8278t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Vlans - maximum no of devices [7:8128]
Why not? you can assign an IP address on a logical interface and mask it just like a physical interface. You can have this: interface vlan 12 ip address 172.11.10.0 255.255.254.0 or interface fastethernet 1/0.1 encapsulation isl 12 ip address 172.11.10.0 255.255.255.254.0 Just as previous responder say this mask would have 512 address available minus network and broadcast address = 510 host addresses. From: Kevin Wigle Reply-To: Kevin Wigle To: [EMAIL PROTECTED] Subject: Re: Vlans - maximum no of devices [7:8128] Date: Tue, 12 Jun 2001 20:20:32 -0400 that may be true if your subnet has a subnet mask of /24.. but how big is your subnet if it is subnetted with a /23 so. is it still a subnet? does a vlan have a special subnet? can a vlan subnet have a mask of /23? Kevin Wigle - Original Message - From: Chris Haller To: Sent: Tuesday, 12 June, 2001 19:45 Subject: Re: Vlans - maximum no of devices [7:8128] If I remember correctly, each VLAN is it's own subnet. And therefore, if each vlan is it's own subnet, you can only have 254 devices attached to each subnet. You may wanna check that on CCO. --- John Kale wrote: hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. [EMAIL PROTECTED] = Chris from Chicago MasterCNE, 5.x CNE, ICNE, 4.x CNE, CCNA, MCP __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/ _ Get your FREE download of MSN Explorer at http://explorer.msn.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8279t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Vlans - maximum no of devices [7:8128]
Bob is correct. This is called supernetting; but then, what is the point of having so many active entities on the in the one broadcast domain? Cheers, Jack Bob S on 13/06/2001 09:08:45 Please respond to Bob S To: [EMAIL PROTECTED] cc:(bcc: Jack Jessen/Sydney/CDM) Subject: Re: Vlans - maximum no of devices [7:8128] Why not? you can assign an IP address on a logical interface and mask it just like a physical interface. You can have this: interface vlan 12 ip address 172.11.10.0 255.255.254.0 or interface fastethernet 1/0.1 encapsulation isl 12 ip address 172.11.10.0 255.255.255.254.0 Just as previous responder say this mask would have 512 address available minus network and broadcast address = 510 host addresses. From: Kevin Wigle Reply-To: Kevin Wigle To: [EMAIL PROTECTED] Subject: Re: Vlans - maximum no of devices [7:8128] Date: Tue, 12 Jun 2001 20:20:32 -0400 that may be true if your subnet has a subnet mask of /24.. but how big is your subnet if it is subnetted with a /23 so. is it still a subnet? does a vlan have a special subnet? can a vlan subnet have a mask of /23? Kevin Wigle - Original Message - From: Chris Haller To: Sent: Tuesday, 12 June, 2001 19:45 Subject: Re: Vlans - maximum no of devices [7:8128] If I remember correctly, each VLAN is it's own subnet. And therefore, if each vlan is it's own subnet, you can only have 254 devices attached to each subnet. You may wanna check that on CCO. --- John Kale wrote: hi all, I read somewhere that there can only be a maximum of 254 devices in a vlan. I'm currently redesigning a network that would have a vlan containing about 300 devices. Is the 254 restriction a design one? Please can someone enlighting me on this issue. regards, Tunde _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. [EMAIL PROTECTED] = Chris from Chicago MasterCNE, 5.x CNE, ICNE, 4.x CNE, CCNA, MCP __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/ _ Get your FREE download of MSN Explorer at http://explorer.msn.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8288t=8128 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
