Re: DHCP questions
Greg I think you need to talk to someone about your caffeine intake. I've been catching up on my list mail [worked down from 1200 unread] and time and again you're acting like a smartalec to people with questions. I look forward to the day when you have to ask for this list's help and then find the first answer you get is from someone you smartmouthed. Glib answers like Why don't you upgrade to W2K. All those issues will go away. are useless to consultants to companies with tight budgets, many of who I deal with everyday. As someone who HAS had a DHCP server fail, and got a similar answer to that scenario a few months back, I can only wish all my hardware had an infinite MTBF and my bank account an infinite supply of cash but we don't all get what we wish for. Oh and by the way - you may want to check the definition of lurker. Plenty of NT folk read but don't post on this list, plenty of (mostly) non-NT folk do. The former are lurkers. Have a really nice day now. Mark Dowling Sirius Information Systems, Enterprise House, Marina Commercial Park, Cork, Ireland +353-21-4316899 [fax 4316880] [EMAIL PROTECTED] - Original Message - From: Greg Page [EMAIL PROTECTED] To: NT System Admin Issues [EMAIL PROTECTED] Sent: Thursday, September 20, 2001 3:31 AM Subject: RE: DHCP questions This sounds so screwed up. Why do you think you need TWO DHCP servers. I've run one on my networks for 8 years and have never had a failure. Even if it did crap out, the scope could be created on a new DHCP server in 20 minutes. The important stuff you want to give static addresses to; reservations are for leisure activities. Greg -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 1:16 PM To: NT System Admin Issues Subject: DHCP questions I have two DHCP servers running mutually exclusive scope of IP addresses. If I want to add reservations for IP (that do not belong to either scope) do I need to add those reservation to both servers OR just one server? Thanks Davinder http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm
DHCP questions
I have two DHCP servers running mutually exclusive scope of IP addresses. If I want to add reservations for IP (that do not belong to either scope) do I need to add those reservation to both servers OR just one server? Thanks Davinder http://www.sunbelt-software.com/ntsysadmin_list_charter.htm
RE: DHCP questions
Why would you add a reservation for an IP outside of either of the scopes? If the address is outside of the scope, it will never be assigned by either of the servers. Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:16 PM To: NT System Admin Issues Subject: DHCP questions I have two DHCP servers running mutually exclusive scope of IP addresses. If I want to add reservations for IP (that do not belong to either scope) do I need to add those reservation to both servers OR just one server? Thanks Davinder http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm
RE: DHCP questions
Now if I use IP address that belongs to either of the scopes then couldn't the other DHCP server assign an IP address from its pool when the DHCP request goes out. Thanks Davinder -Original Message- From: Clayton [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 11:17 AM To: NT System Admin Issues Subject:RE: DHCP questions Why would you add a reservation for an IP outside of either of the scopes? If the address is outside of the scope, it will never be assigned by either of the servers. Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:16 PM To: NT System Admin Issues Subject: DHCP questions I have two DHCP servers running mutually exclusive scope of IP addresses. If I want to add reservations for IP (that do not belong to either scope) do I need to add those reservation to both servers OR just one server? Thanks Davinder http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm
RE: DHCP questions
Title: RE: DHCP questions Yes - but if you do as you state in your original question and use IP addresses OUTSIDE of either scope a reservation would not be required because those servers would not know of that IP address to dynamically assign it to anyone anyway. Jim Zangara, MCSE+I Special Projects Engineer Premiere Radio Networks A Division of Clear Channel Communications 15260 Ventura Blvd Suite 500 Sherman Oaks, CA 91403 Direct: (818) 461-8620 mailto:[EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 10:23 AM To: NT System Admin Issues Subject: RE: DHCP questions Now if I use IP address that belongs to either of the scopes then couldn't the other DHCP server assign an IP address from its pool when the DHCP request goes out. Thanks Davinder -Original Message- From: Clayton [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 11:17 AM To: NT System Admin Issues Subject: RE: DHCP questions Why would you add a reservation for an IP outside of either of the scopes? If the address is outside of the scope, it will never be assigned by either of the servers. Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:16 PM To: NT System Admin Issues Subject: DHCP questions I have two DHCP servers running mutually exclusive scope of IP addresses. If I want to add reservations for IP (that do not belong to either scope) do I need to add those reservation to both servers OR just one server? Thanks Davinder http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm
RE: DHCP questions
Let's take a look at a possible scenario, just to make sure that I understand you. Server A has a range of say 10.0.0.1 - 10.0.0.99 Server B has a range of 10.0.0.100 - 10.0.0.199 You have a client that always uses 10.0.0.200 Since neither server has .200 in its range of addresses, it will never be able to assign it, and therefore you do not require a reservation, but only a static IP Address on the specific client. If it is a DHCP client, then you must add the address you want it to have to either of your scopes, and then create a reservation for that address. What you must avoid is a scenario where the same IP Address exists in both scopes. If both DHCP servers contain identical IP addresses within their scopes you need to redefine the scopes as it will be possible for IP conflicts to occur in that scenario (IE the same address could be handed out twice, once by each server). Hope that helps... Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:23 PM To: NT System Admin Issues Subject: RE: DHCP questions Now if I use IP address that belongs to either of the scopes then couldn't the other DHCP server assign an IP address from its pool when the DHCP request goes out. Thanks Davinder -Original Message- From: Clayton [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 11:17 AM To: NT System Admin Issues Subject:RE: DHCP questions Why would you add a reservation for an IP outside of either of the scopes? If the address is outside of the scope, it will never be assigned by either of the servers. Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:16 PM To: NT System Admin Issues Subject: DHCP questions I have two DHCP servers running mutually exclusive scope of IP addresses. If I want to add reservations for IP (that do not belong to either scope) do I need to add those reservation to both servers OR just one server? Thanks Davinder http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm
Re: DHCP questions
let's get simple! if you give it an ip address it won't ask for one problem solved. Matt - Original Message - From: Clayton [EMAIL PROTECTED] To: NT System Admin Issues [EMAIL PROTECTED] Sent: Wednesday, September 19, 2001 11:37 AM Subject: RE: DHCP questions Let's take a look at a possible scenario, just to make sure that I understand you. Server A has a range of say 10.0.0.1 - 10.0.0.99 Server B has a range of 10.0.0.100 - 10.0.0.199 You have a client that always uses 10.0.0.200 Since neither server has .200 in its range of addresses, it will never be able to assign it, and therefore you do not require a reservation, but only a static IP Address on the specific client. If it is a DHCP client, then you must add the address you want it to have to either of your scopes, and then create a reservation for that address. What you must avoid is a scenario where the same IP Address exists in both scopes. If both DHCP servers contain identical IP addresses within their scopes you need to redefine the scopes as it will be possible for IP conflicts to occur in that scenario (IE the same address could be handed out twice, once by each server). Hope that helps... Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:23 PM To: NT System Admin Issues Subject: RE: DHCP questions Now if I use IP address that belongs to either of the scopes then couldn't the other DHCP server assign an IP address from its pool when the DHCP request goes out. Thanks Davinder -Original Message- From: Clayton [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 11:17 AM To: NT System Admin Issues Subject: RE: DHCP questions Why would you add a reservation for an IP outside of either of the scopes? If the address is outside of the scope, it will never be assigned by either of the servers. Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:16 PM To: NT System Admin Issues Subject: DHCP questions I have two DHCP servers running mutually exclusive scope of IP addresses. If I want to add reservations for IP (that do not belong to either scope) do I need to add those reservation to both servers OR just one server? Thanks Davinder http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm
RE: DHCP questions
That's assuming he has his DHCP scopes defined correctly... Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Matt Moore [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:47 PM To: NT System Admin Issues Subject: Re: DHCP questions let's get simple! if you give it an ip address it won't ask for one problem solved. Matt - Original Message - From: Clayton [EMAIL PROTECTED] To: NT System Admin Issues [EMAIL PROTECTED] Sent: Wednesday, September 19, 2001 11:37 AM Subject: RE: DHCP questions Let's take a look at a possible scenario, just to make sure that I understand you. Server A has a range of say 10.0.0.1 - 10.0.0.99 Server B has a range of 10.0.0.100 - 10.0.0.199 You have a client that always uses 10.0.0.200 Since neither server has .200 in its range of addresses, it will never be able to assign it, and therefore you do not require a reservation, but only a static IP Address on the specific client. If it is a DHCP client, then you must add the address you want it to have to either of your scopes, and then create a reservation for that address. What you must avoid is a scenario where the same IP Address exists in both scopes. If both DHCP servers contain identical IP addresses within their scopes you need to redefine the scopes as it will be possible for IP conflicts to occur in that scenario (IE the same address could be handed out twice, once by each server). Hope that helps... Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:23 PM To: NT System Admin Issues Subject: RE: DHCP questions Now if I use IP address that belongs to either of the scopes then couldn't the other DHCP server assign an IP address from its pool when the DHCP request goes out. Thanks Davinder -Original Message- From: Clayton [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 11:17 AM To: NT System Admin Issues Subject: RE: DHCP questions Why would you add a reservation for an IP outside of either of the scopes? If the address is outside of the scope, it will never be assigned by either of the servers. Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:16 PM To: NT System Admin Issues Subject: DHCP questions I have two DHCP servers running mutually exclusive scope of IP addresses. If I want to add reservations for IP (that do not belong to either scope) do I need to add those reservation to both servers OR just one server? Thanks Davinder http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm
RE: DHCP questions
Thanks for your replies. I think I was confused by this and still am: If I setup a reservation from within the scopes of one server and client starts to get addresses from that server. I am concerned about the event in which the DHCP request is handled by the second DHCP server (for any reason) then the second DHCP server not being aware of the reservation assigns it an address from its pool. Could you explain this? I now know there is no point adding a reservation from outside the pool on the second server.. Thanks Davidner -Original Message- From: Clayton [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 11:48 AM To: NT System Admin Issues Subject:RE: DHCP questions That's assuming he has his DHCP scopes defined correctly... Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Matt Moore [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:47 PM To: NT System Admin Issues Subject: Re: DHCP questions let's get simple! if you give it an ip address it won't ask for one problem solved. Matt - Original Message - From: Clayton [EMAIL PROTECTED] To: NT System Admin Issues [EMAIL PROTECTED] Sent: Wednesday, September 19, 2001 11:37 AM Subject: RE: DHCP questions Let's take a look at a possible scenario, just to make sure that I understand you. Server A has a range of say 10.0.0.1 - 10.0.0.99 Server B has a range of 10.0.0.100 - 10.0.0.199 You have a client that always uses 10.0.0.200 Since neither server has .200 in its range of addresses, it will never be able to assign it, and therefore you do not require a reservation, but only a static IP Address on the specific client. If it is a DHCP client, then you must add the address you want it to have to either of your scopes, and then create a reservation for that address. What you must avoid is a scenario where the same IP Address exists in both scopes. If both DHCP servers contain identical IP addresses within their scopes you need to redefine the scopes as it will be possible for IP conflicts to occur in that scenario (IE the same address could be handed out twice, once by each server). Hope that helps... Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:23 PM To: NT System Admin Issues Subject: RE: DHCP questions Now if I use IP address that belongs to either of the scopes then couldn't the other DHCP server assign an IP address from its pool when the DHCP request goes out. Thanks Davinder -Original Message- From: Clayton [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 11:17 AM To: NT System Admin Issues Subject: RE: DHCP questions Why would you add a reservation for an IP outside of either of the scopes? If the address is outside of the scope, it will never be assigned by either of the servers. Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:16 PM To: NT System Admin Issues Subject: DHCP questions I have two DHCP servers running mutually exclusive scope of IP addresses. If I want to add reservations for IP (that do not belong to either scope) do I need to add those reservation to both servers OR just one server? Thanks Davinder http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm
RE: DHCP questions
I think what you may want to do for redundancy since you have two dhcp servers is that overlaps a section of the address on both servers and make the static reservations on both. Make sure this section is use for static only and the address assigned has to be the same on both servers otherwise you'll run into duplicate IP address issue. John Chu System Engineer E-Business Department Federal Reserve Bank of Chicago (312)322-2190 Zangara, Jim [EMAIL PROTECTED] on 09/19/2001 12:22:38 PM Please respond to NT System Admin Issues [EMAIL PROTECTED] To: NT System Admin Issues [EMAIL PROTECTED] cc: Subject: RE: DHCP questions Yes - but if you do as you state in your original question and use IP addresses OUTSIDE of either scope a reservation would not be required because those servers would not know of that IP address to dynamically assign it to anyone anyway. Jim Zangara, MCSE+I Special Projects Engineer Premiere Radio Networks A Division of Clear Channel Communications 15260 Ventura Blvd Suite 500 Sherman Oaks, CA 91403 Direct: (818) 461-8620 mailto:[EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 10:23 AM To: NT System Admin Issues Subject: RE: DHCP questions Now if I use IP address that belongs to either of the scopes then couldn't the other DHCP server assign an IP address from its pool when the DHCP request goes out. Thanks Davinder -Original Message- From: Clayton [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 11:17 AM To: NT System Admin Issues Subject: RE: DHCP questions Why would you add a reservation for an IP outside of either of the scopes? If the address is outside of the scope, it will never be assigned by either of the servers. Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:16 PM To: NT System Admin Issues Subject: DHCP questions I have two DHCP servers running mutually exclusive scope of IP addresses. If I want to add reservations for IP (that do not belong to either scope) do I need to add those reservation to both servers OR just one server? Thanks Davinder http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm
RE: DHCP questions
That is exactly what I do here. This is an example, maybe it will help: Server 1 199.222.222.50 to 199.222.222.100 reserve 199.222.222.50 to 199.222.222.75 Server 2 199.222.222.50 to 199.222.222.100 reserve 199.222.222.76 to 199.222.222.100 This gives you redundancy, if one of your servers goes down, you just open up the scope on the other server. For static ip's you can use 199.222.222.10 through 199.222.222.49; these are not in the DHCP servers so you don't have to worry. Cheryl A. Turcotte mailto:[EMAIL PROTECTED] -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 2:22 PM To: NT System Admin Issues Subject: RE: DHCP questions I think what you may want to do for redundancy since you have two dhcp servers is that overlaps a section of the address on both servers and make the static reservations on both. Make sure this section is use for static only and the address assigned has to be the same on both servers otherwise you'll run into duplicate IP address issue. John Chu System Engineer E-Business Department Federal Reserve Bank of Chicago (312)322-2190 Zangara, Jim [EMAIL PROTECTED] on 09/19/2001 12:22:38 PM Please respond to NT System Admin Issues [EMAIL PROTECTED] To: NT System Admin Issues [EMAIL PROTECTED] cc: Subject: RE: DHCP questions Yes - but if you do as you state in your original question and use IP addresses OUTSIDE of either scope a reservation would not be required because those servers would not know of that IP address to dynamically assign it to anyone anyway. Jim Zangara, MCSE+I Special Projects Engineer Premiere Radio Networks A Division of Clear Channel Communications 15260 Ventura Blvd Suite 500 Sherman Oaks, CA 91403 Direct: (818) 461-8620 mailto:[EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 10:23 AM To: NT System Admin Issues Subject: RE: DHCP questions Now if I use IP address that belongs to either of the scopes then couldn't the other DHCP server assign an IP address from its pool when the DHCP request goes out. Thanks Davinder -Original Message- From: Clayton [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 11:17 AM To: NT System Admin Issues Subject: RE: DHCP questions Why would you add a reservation for an IP outside of either of the scopes? If the address is outside of the scope, it will never be assigned by either of the servers. Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:16 PM To: NT System Admin Issues Subject: DHCP questions I have two DHCP servers running mutually exclusive scope of IP addresses. If I want to add reservations for IP (that do not belong to either scope) do I need to add those reservation to both servers OR just one server? Thanks Davinder http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm
RE: DHCP questions
I am a little confused by your scenario. Are you saying that all of your clients have reserved IP's? If not, I could see the following scenario occurring: Client A has reservation for 199.222.222.55 from Server 1 Client B requests IP address from Server 2 Server 2; not having a reservation for 199.222.222.55, assigns it to Client B Client B is unable to participate on the IP network because it detects an IP Conflict. Perhaps I am missing something? The scenario I understood from John Chu was the following: Server 1 has scope 199.222.221.50 to 224 (leaving IP's available for servers, routers, etc) Server 1 has scope 199.222.222.50 to 100 (all for static reservations) Server 2 has scope 199.222.222.50 to 100 (all for static reservations - redundancy) Server 2 has scope 199.222.223.50 to 224 (leaving IP's available for servers, routers, etc) In order to make your DHCP servers has redundant as possible, you might want to run DHCP backup, and then use a utility like DHCPEXIM to export/import the database. -Original Message- From: Turcotte, Cheryl A [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 3:06 PM To: NT System Admin Issues Subject:RE: DHCP questions That is exactly what I do here. This is an example, maybe it will help: Server 1 199.222.222.50 to 199.222.222.100 reserve 199.222.222.50 to 199.222.222.75 Server 2 199.222.222.50 to 199.222.222.100 reserve 199.222.222.76 to 199.222.222.100 This gives you redundancy, if one of your servers goes down, you just open up the scope on the other server. For static ip's you can use 199.222.222.10 through 199.222.222.49; these are not in the DHCP servers so you don't have to worry. Cheryl A. Turcotte mailto:[EMAIL PROTECTED] -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 2:22 PM To: NT System Admin Issues Subject: RE: DHCP questions I think what you may want to do for redundancy since you have two dhcp servers is that overlaps a section of the address on both servers and make the static reservations on both. Make sure this section is use for static only and the address assigned has to be the same on both servers otherwise you'll run into duplicate IP address issue. John Chu System Engineer E-Business Department Federal Reserve Bank of Chicago (312)322-2190 Zangara, Jim [EMAIL PROTECTED] on 09/19/2001 12:22:38 PM Please respond to NT System Admin Issues [EMAIL PROTECTED] To: NT System Admin Issues [EMAIL PROTECTED] cc: Subject: RE: DHCP questions Yes - but if you do as you state in your original question and use IP addresses OUTSIDE of either scope a reservation would not be required because those servers would not know of that IP address to dynamically assign it to anyone anyway. Jim Zangara, MCSE+I Special Projects Engineer Premiere Radio Networks A Division of Clear Channel Communications 15260 Ventura Blvd Suite 500 Sherman Oaks, CA 91403 Direct: (818) 461-8620 mailto:[EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 10:23 AM To: NT System Admin Issues Subject: RE: DHCP questions Now if I use IP address that belongs to either of the scopes then couldn't the other DHCP server assign an IP address from its pool when the DHCP request goes out. Thanks Davinder -Original Message- From: Clayton [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 11:17 AM To: NT System Admin Issues Subject:RE: DHCP questions Why would you add a reservation for an IP outside of either of the scopes? If the address is outside of the scope, it will never be assigned by either of the servers. Clayton Doige IT Manager MCSE, MCP + I Gameday International N.V. Bound in a nutshell, King of infinite space... T: +5 999 736 0309 ext 4537 C: +5 999 563 1845 F: +5 999 733 1259 E: [EMAIL PROTECTED] -Original Message- From: Davinder Gupta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 19, 2001 12:16 PM To: NT System Admin Issues Subject: DHCP questions I have two DHCP servers running mutually exclusive scope of IP addresses. If I want to add reservations for IP (that do not belong to either scope) do I need to add those reservation to both servers OR just one server? Thanks Davinder http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm http://www.sunbelt-software.com/ntsysadmin_list_charter.htm
