Re: After supernetting!!
CCDA note (went to a partner freebie today, hehee): Cisco recommends no more than 300 IP hosts per broadcast domain, 200 multiprotocol hosts per broadcast domain. (I think it's all just a gimmick to sell more L3 switches and routers). ""Donald B Johnson Jr"" [EMAIL PROTECTED] wrote in message 019801c04aaa$79c12250$[EMAIL PROTECTED]">news:019801c04aaa$79c12250$[EMAIL PROTECTED]... I would flatten the network "expert" that told you to flatten the network. Thought you said there was DHCP server. Let the server allocate the addresses. With the whole world going to switches and vlans. Why would you want that many hosts on the same subnet. Five hundred stations broadcasting, has got to be a lot of traffic. Duck - Original Message - From: jeongwoo park [EMAIL PROTECTED] To: Groupstudy [EMAIL PROTECTED] Sent: Tuesday, November 07, 2000 4:20 PM Subject: After supernetting!! Hi all Let's say there are 5 subnets (Class B/16 subnet mask) consisting of approximately 500 DHCP clients and 20 servers. Someone as a Network Expert suggested flattening the network. As a Network newbie, I simply followed the instruction from the book on how to supernet, and finally summarized those 5 contiguous subnets into following address: 123.80.0.0/14 (**this is a made-up number) Now I am done with supernetting. What is the next to be done? What should I do with this ip address? Should I go to physically to these 520 stations one by one for new tcp/ip setup? I think there should be better way than this. Looking for your help. Thanks jw __ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one Place. http://shopping.yahoo.com/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: After supernetting!!
If we look at this question in terms of moving the network mask to the left or to the right, all of these terms come into perspective. Take the mask ... Ones indicate the network portion. Zeros indicate the host portion. If we shrink ( move to the left ) the zeros, we are, depending upon the context, summarizing, supernetting, aggregating. If we expand ( move to the right ) the ones, we are subnetting. If we start with the same network mask, and expand the ones differently for several different subnets, we are variably subnetting, or using VLSM. I think it is more useful to understand what is happening at the bit level than to worry about terminology that is admittedly used sloppily in the various study materials we use. Chuck -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Donald B Johnson Jr Sent: Thursday, November 09, 2000 5:15 PM To: Brian; jeongwoo park Cc: Groupstudy Subject:Re: After supernetting!! I thought supernetting was combining several small networks into one big one, the opposite of subnetting which takes one big network and breaks it into smaller ones. Summarizing is a technique where you combine several larger perfixs into one smaller prefix that includes the larger perfixs and then advertise the smaller prefix in routing updates. This technique reduces routing table entries. Aggregation and VLSM are different too. These terms are not interchangable. You should really have a clear understanding of these concepts for the big one. Duck - Original Message - From: Brian [EMAIL PROTECTED] To: jeongwoo park [EMAIL PROTECTED] Cc: Groupstudy [EMAIL PROTECTED] Sent: Wednesday, November 08, 2000 8:57 AM Subject: Re: After supernetting!! On Tue, 7 Nov 2000, jeongwoo park wrote: Hi all Let's say there are 5 subnets (Class B/16 subnet mask) consisting of approximately 500 DHCP clients and 20 servers. Someone as a Network Expert suggested flattening the network. As a Network newbie, I simply followed the instruction from the book on how to supernet, and finally summarized those 5 contiguous subnets into following address: 123.80.0.0/14 (**this is a made-up number) Now I am done with supernetting. What is the next to be done? What should I do with this ip address? Should I go to physically to these 520 stations one by one for new tcp/ip setup? I think there should be better way than this. Supernetting, summarizing, whatever you want to call it, at aggregation points within your network is a great idea, so yes I agree that somewhere in your network you should try to aggregate routes as much as possible. Flattening a /14 worth of space and giving users a 255.252.0.0 netmask on their desktops sounds more like "Super-kludging" than "supernetting" :) Why would you have 520 stations consuming a /14 worth of space anyways? Brian Looking for your help. Thanks jw __ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one Place. http://shopping.yahoo.com/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] --- Brian Feeny, CCNP, CCDP [EMAIL PROTECTED] Network Administrator ShreveNet Inc. (ASN 11881) _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: After supernetting!!
On Tue, 7 Nov 2000, jeongwoo park wrote: Hi all Lets say there are 5 subnets (Class B/16 subnet mask) consisting of approximately 500 DHCP clients and 20 servers. Someone as a Network Expert suggested flattening the network. As a Network newbie, I simply followed the instruction from the book on how to supernet, and finally summarized those 5 contiguous subnets into following address: 123.80.0.0/14 (**this is a made-up number) Now I am done with supernetting. What is the next to be done? What should I do with this ip address? Should I go to physically to these 520 stations one by one for new tcp/ip setup? I think there should be better way than this. Supernetting, summarizing, whatever you want to call it, at aggregation points within your network is a great idea, so yes I agree that somewhere in your network you should try to aggregate routes as much as possible. Flattening a /14 worth of space and giving users a 255.252.0.0 netmask on their desktops sounds more like "Super-kludging" than "supernetting" :) Why would you have 520 stations consuming a /14 worth of space anyways? Brian Looking for your help Thanks jw __ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one Place. http://shopping.yahoo.com/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] --- Brian Feeny, CCNP, CCDP [EMAIL PROTECTED] Network Administrator ShreveNet Inc. (ASN 11881) _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: After supernetting!!
I would flatten the network "expert" that told you to flatten the network. Thought you said there was DHCP server. Let the server allocate the addresses. With the whole world going to switches and vlans. Why would you want that many hosts on the same subnet. Five hundred stations broadcasting, has got to be a lot of traffic. Duck - Original Message - From: jeongwoo park [EMAIL PROTECTED] To: Groupstudy [EMAIL PROTECTED] Sent: Tuesday, November 07, 2000 4:20 PM Subject: After supernetting!! Hi all Let's say there are 5 subnets (Class B/16 subnet mask) consisting of approximately 500 DHCP clients and 20 servers. Someone as a Network Expert suggested flattening the network. As a Network newbie, I simply followed the instruction from the book on how to supernet, and finally summarized those 5 contiguous subnets into following address: 123.80.0.0/14 (**this is a made-up number) Now I am done with supernetting. What is the next to be done? What should I do with this ip address? Should I go to physically to these 520 stations one by one for new tcp/ip setup? I think there should be better way than this. Looking for your help. Thanks jw __ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one Place. http://shopping.yahoo.com/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: After supernetting!!
I thought supernetting was combining several small networks into one big one, the opposite of subnetting which takes one big network and breaks it into smaller ones. Summarizing is a technique where you combine several larger perfixs into one smaller prefix that includes the larger perfixs and then advertise the smaller prefix in routing updates. This technique reduces routing table entries. Aggregation and VLSM are different too. These terms are not interchangable. You should really have a clear understanding of these concepts for the big one. Duck - Original Message - From: Brian [EMAIL PROTECTED] To: jeongwoo park [EMAIL PROTECTED] Cc: Groupstudy [EMAIL PROTECTED] Sent: Wednesday, November 08, 2000 8:57 AM Subject: Re: After supernetting!! On Tue, 7 Nov 2000, jeongwoo park wrote: Hi all Let's say there are 5 subnets (Class B/16 subnet mask) consisting of approximately 500 DHCP clients and 20 servers. Someone as a Network Expert suggested flattening the network. As a Network newbie, I simply followed the instruction from the book on how to supernet, and finally summarized those 5 contiguous subnets into following address: 123.80.0.0/14 (**this is a made-up number) Now I am done with supernetting. What is the next to be done? What should I do with this ip address? Should I go to physically to these 520 stations one by one for new tcp/ip setup? I think there should be better way than this. Supernetting, summarizing, whatever you want to call it, at aggregation points within your network is a great idea, so yes I agree that somewhere in your network you should try to aggregate routes as much as possible. Flattening a /14 worth of space and giving users a 255.252.0.0 netmask on their desktops sounds more like "Super-kludging" than "supernetting" :) Why would you have 520 stations consuming a /14 worth of space anyways? Brian Looking for your help. Thanks jw __ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one Place. http://shopping.yahoo.com/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] --- Brian Feeny, CCNP, CCDP [EMAIL PROTECTED] Network Administrator ShreveNet Inc. (ASN 11881) _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
