Re: How to minimize the downtime in my case
On Thu, Mar 14, 2013 at 10:29 PM, Manish Rane manish...@gmail.com wrote: So the TTL value we are discussing here are individual NS TTL Value? Or the SOA Default TTL Value. When I viewed my ISP record I found that the SOA Default TTL Value is 12 days and NS RR TTL Value is 3600 secs The SOA does not and never has contained a default TTL value. It once contained a minimum TTL value and it is still generally referenced as such, but it has nothing to do with the TTLs of the records in the zone. In your zone files every RR has a distinct TTL. That is what we are talking about. What? You say that your zone file does not have a TTL on every record? Well, not any more. It is usually specified using the $TTL macro. That defines a default TTL for a zone. You only need specify a TTL when you want something other than the default. If the SOA used to specify a minimum TTL, what is it used for today? It is the time a negative cache entry should be held. It has been tht way since 1998 as per RFC2308. (A negative cache entry is created by the return of a No Data or Non-existent Domain response and the so called minimum TTL is returned with these errors. It should normally be rather short... A few minutes. The TTL on most stable RRs should be hours or even days. You shorten the TTL when you plan some change in a permanent record. -- R. Kevin Oberman, Network Engineer E-mail: rkober...@gmail.com ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: How to minimize the downtime in my case
On 3/14/2013 12:04, Manish Rane wrote: Hey Folks, I right now have NS server hosted with ISP and I am planning to set up my own BIND servers. Now I would like to understand that I need to ask my Registrar to populate the entry of my new NS server which would take 4-6 hours to propagate over the internet. To reduce the downtime, can I not add those two new NS servers along with my old DNS server with exact zone? once all the NS entries populate over the internet I can have my ISP's DNS removed and have one of my DNS server as Master? Current Scenario ns1.example.com http://ns1.example.com1.2.3.4 ns2.example.com http://ns2.example.com 5.6.7.8 I am thnking of below scenario ns1.example.com http://ns1.example.com1.2.3.4 ns2.example.com http://ns2.example.com 5.6.7.8 mynewns1.example.com http://mynewns1.example.com 20.20.20.20 mynewns2.example.com http://mynewns2.example.com 30.30.30.30 Then after few days mynewns1.example.com http://mynewns1.example.com 20.20.20.20 mynewns2.example.com http://mynewns2.example.com 30.30.30.30 Which eventually should have all the records. Maybe I'm over-complicating or under-complicating something here, but why bother? If you just switched directly from the old servers to the new servers, with the zones being identical outside of any NS related changes, wouldn't things just work throughout the transition? Sure, depending on TTLs involved, some clients might hit the old NS and some would hit the new NS until the records aged out of caches, but as long as the other records are identical, users will hit the same web servers, the same MX, etc. -- Dave Warren http://www.hireahit.com/ http://ca.linkedin.com/in/davejwarren ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: How to minimize the downtime in my case
Hi-- On Mar 14, 2013, at 12:04 PM, Manish Rane wrote: I right now have NS server hosted with ISP and I am planning to set up my own BIND servers. Now I would like to understand that I need to ask my Registrar to populate the entry of my new NS server which would take 4-6 hours to propagate over the internet. To reduce the downtime, can I not add those two new NS servers along with my old DNS server with exact zone? once all the NS entries populate over the internet I can have my ISP's DNS removed and have one of my DNS server as Master? You can. once all the NS entries populate over the internet I can have my ISP's DNS removed and have one of my DNS server as Master? Sure. Validate that your new servers work before turning off the old ones for the zone with your registrar, but otherwise, you should be fine. Regards, -- -Chuck ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: How to minimize the downtime in my case
Manish That is a perfectly good plan. One note is to study your TTL. If your ISP has set a longer TTL on your NS records then you would need to first ask for a shorter TTL and wait until the time has passed. Example: if TTL is set to one week, ask for change to shorter period and then wait for 1.5(or more) times the old TTL to pass before you begin your process. On Thu, Mar 14, 2013 at 3:04 PM, Manish Rane manish...@gmail.com wrote: Hey Folks, I right now have NS server hosted with ISP and I am planning to set up my own BIND servers. Now I would like to understand that I need to ask my Registrar to populate the entry of my new NS server which would take 4-6 hours to propagate over the internet. To reduce the downtime, can I not add those two new NS servers along with my old DNS server with exact zone? once all the NS entries populate over the internet I can have my ISP's DNS removed and have one of my DNS server as Master? Current Scenario ns1.example.com1.2.3.4 ns2.example.com 5.6.7.8 I am thnking of below scenario ns1.example.com1.2.3.4 ns2.example.com 5.6.7.8 mynewns1.example.com 20.20.20.20 mynewns2.example.com 30.30.30.30 Then after few days mynewns1.example.com 20.20.20.20 mynewns2.example.com 30.30.30.30 Which eventually should have all the records. Please advise!! ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users -- ~ Andrew lathama Latham lath...@gmail.com http://lathama.net ~ ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: How to minimize the downtime in my case
hmm...you are talking about SOA TTL Value? On Fri, Mar 15, 2013 at 12:40 AM, Andrew Latham lath...@gmail.com wrote: Manish That is a perfectly good plan. One note is to study your TTL. If your ISP has set a longer TTL on your NS records then you would need to first ask for a shorter TTL and wait until the time has passed. Example: if TTL is set to one week, ask for change to shorter period and then wait for 1.5(or more) times the old TTL to pass before you begin your process. On Thu, Mar 14, 2013 at 3:04 PM, Manish Rane manish...@gmail.com wrote: Hey Folks, I right now have NS server hosted with ISP and I am planning to set up my own BIND servers. Now I would like to understand that I need to ask my Registrar to populate the entry of my new NS server which would take 4-6 hours to propagate over the internet. To reduce the downtime, can I not add those two new NS servers along with my old DNS server with exact zone? once all the NS entries populate over the internet I can have my ISP's DNS removed and have one of my DNS server as Master? Current Scenario ns1.example.com1.2.3.4 ns2.example.com 5.6.7.8 I am thnking of below scenario ns1.example.com1.2.3.4 ns2.example.com 5.6.7.8 mynewns1.example.com 20.20.20.20 mynewns2.example.com 30.30.30.30 Then after few days mynewns1.example.com 20.20.20.20 mynewns2.example.com 30.30.30.30 Which eventually should have all the records. Please advise!! ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users -- ~ Andrew lathama Latham lath...@gmail.com http://lathama.net ~ ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: How to minimize the downtime in my case
Also when my ISP DNS servers are live do I need to add mine one as a slave ones? both? On Fri, Mar 15, 2013 at 12:44 AM, Manish Rane manish...@gmail.com wrote: hmm...you are talking about SOA TTL Value? On Fri, Mar 15, 2013 at 12:40 AM, Andrew Latham lath...@gmail.com wrote: Manish That is a perfectly good plan. One note is to study your TTL. If your ISP has set a longer TTL on your NS records then you would need to first ask for a shorter TTL and wait until the time has passed. Example: if TTL is set to one week, ask for change to shorter period and then wait for 1.5(or more) times the old TTL to pass before you begin your process. On Thu, Mar 14, 2013 at 3:04 PM, Manish Rane manish...@gmail.com wrote: Hey Folks, I right now have NS server hosted with ISP and I am planning to set up my own BIND servers. Now I would like to understand that I need to ask my Registrar to populate the entry of my new NS server which would take 4-6 hours to propagate over the internet. To reduce the downtime, can I not add those two new NS servers along with my old DNS server with exact zone? once all the NS entries populate over the internet I can have my ISP's DNS removed and have one of my DNS server as Master? Current Scenario ns1.example.com1.2.3.4 ns2.example.com 5.6.7.8 I am thnking of below scenario ns1.example.com1.2.3.4 ns2.example.com 5.6.7.8 mynewns1.example.com 20.20.20.20 mynewns2.example.com 30.30.30.30 Then after few days mynewns1.example.com 20.20.20.20 mynewns2.example.com 30.30.30.30 Which eventually should have all the records. Please advise!! ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users -- ~ Andrew lathama Latham lath...@gmail.com http://lathama.net ~ ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: How to minimize the downtime in my case
Will my new config would look like this? will it be a Slave for my new servers? ns1.example.com1.2.3.4--- Master ns2.example.com 5.6.7.8--Slave mynewns1.example.com 20.20.20.20 -- Slave mynewns2.example.com 30.30.30.30 Slave On Fri, Mar 15, 2013 at 12:44 AM, Manish Rane manish...@gmail.com wrote: hmm...you are talking about SOA TTL Value? On Fri, Mar 15, 2013 at 12:40 AM, Andrew Latham lath...@gmail.com wrote: Manish That is a perfectly good plan. One note is to study your TTL. If your ISP has set a longer TTL on your NS records then you would need to first ask for a shorter TTL and wait until the time has passed. Example: if TTL is set to one week, ask for change to shorter period and then wait for 1.5(or more) times the old TTL to pass before you begin your process. On Thu, Mar 14, 2013 at 3:04 PM, Manish Rane manish...@gmail.com wrote: Hey Folks, I right now have NS server hosted with ISP and I am planning to set up my own BIND servers. Now I would like to understand that I need to ask my Registrar to populate the entry of my new NS server which would take 4-6 hours to propagate over the internet. To reduce the downtime, can I not add those two new NS servers along with my old DNS server with exact zone? once all the NS entries populate over the internet I can have my ISP's DNS removed and have one of my DNS server as Master? Current Scenario ns1.example.com1.2.3.4 ns2.example.com 5.6.7.8 I am thnking of below scenario ns1.example.com1.2.3.4 ns2.example.com 5.6.7.8 mynewns1.example.com 20.20.20.20 mynewns2.example.com 30.30.30.30 Then after few days mynewns1.example.com 20.20.20.20 mynewns2.example.com 30.30.30.30 Which eventually should have all the records. Please advise!! ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users -- ~ Andrew lathama Latham lath...@gmail.com http://lathama.net ~ ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
RE: How to minimize the downtime in my case
Given the that you will eventually stop using ns1 and ns2 You should probably set up mynewns1 as the master with mynewns2 as a slave of mynewns1. Date: Fri, 15 Mar 2013 01:05:50 +0530 Subject: Re: How to minimize the downtime in my case From: manish...@gmail.com To: lath...@gmail.com CC: bind-users@lists.isc.org Will my new config would look like this? will it be a Slave for my new servers? ns1.example.com1.2.3.4--- Master ns2.example.com 5.6.7.8--Slave mynewns1.example.com 20.20.20.20 -- Slave mynewns2.example.com 30.30.30.30 Slave On Fri, Mar 15, 2013 at 12:44 AM, Manish Rane manish...@gmail.com wrote: hmm...you are talking about SOA TTL Value? On Fri, Mar 15, 2013 at 12:40 AM, Andrew Latham lath...@gmail.com wrote: Manish That is a perfectly good plan. One note is to study your TTL. If your ISP has set a longer TTL on your NS records then you would need to first ask for a shorter TTL and wait until the time has passed. Example: if TTL is set to one week, ask for change to shorter period and then wait for 1.5(or more) times the old TTL to pass before you begin your process. On Thu, Mar 14, 2013 at 3:04 PM, Manish Rane manish...@gmail.com wrote: Hey Folks, I right now have NS server hosted with ISP and I am planning to set up my own BIND servers. Now I would like to understand that I need to ask my Registrar to populate the entry of my new NS server which would take 4-6 hours to propagate over the internet. To reduce the downtime, can I not add those two new NS servers along with my old DNS server with exact zone? once all the NS entries populate over the internet I can have my ISP's DNS removed and have one of my DNS server as Master? Current Scenario ns1.example.com1.2.3.4 ns2.example.com 5.6.7.8 I am thnking of below scenario ns1.example.com1.2.3.4 ns2.example.com 5.6.7.8 mynewns1.example.com 20.20.20.20 mynewns2.example.com 30.30.30.30 Then after few days mynewns1.example.com 20.20.20.20 mynewns2.example.com 30.30.30.30 Which eventually should have all the records. Please advise!! ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users -- ~ Andrew lathama Latham lath...@gmail.com http://lathama.net ~ ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
