nanog mailing list archives
Re: ISP inbound failover without BGP
From: Sebastian Spies <s+Mailinglisten.nanog () sloc de>
Date: Tue, 04 Mar 2014 15:16:19 +0100
Am 04.03.2014 05:19, schrieb William Herrin:
Reasons why dynamic DNS fails to perform as expected include: * Web browser DNS pinning can result in a customer's web browser holding the old IP address indefinitely. * Host-level caching of looked up names which discards the TTL. Remember: your desktop or laptop performs lookups against multiple name services, e.g. DNS, /etc/hosts, lmhosts, NIS+. DNS TTL is no longer in scope once the name to address map enters the generic host lookup mechanism. Most OSes have a fixed timeout of one sort or another, some old ones as long as 24 hours.
* Eyeball ISPs' DNS resolvers might tamper with TTL values. -- SEBASTIAN SPIES lnked.in/sspies vastly.de
Current thread:
- Re: ISP inbound failover without BGP, (continued)
- Re: ISP inbound failover without BGP Joe Greco (Mar 03)
- Re: ISP inbound failover without BGP Randy Carpenter (Mar 03)
- Re: ISP inbound failover without BGP Arturo Servin (Mar 03)
- Re: ISP inbound failover without BGP Eric A Louie (Mar 03)
- Re: ISP inbound failover without BGP Faisal Imtiaz (Mar 03)
- Re: ISP inbound failover without BGP Justin M. Streiner (Mar 03)
- Re: ISP inbound failover without BGP Jon Lewis (Mar 03)
- Re: ISP inbound failover without BGP Seth Mattinen (Mar 03)
- Re: ISP inbound failover without BGP Vlade Ristevski (Mar 04)
- Re: ISP inbound failover without BGP William Herrin (Mar 03)
- Re: ISP inbound failover without BGP Sebastian Spies (Mar 04)
- Re: ISP inbound failover without BGP Justin M. Streiner (Mar 03)
- Re: ISP inbound failover without BGP Hank Nussbacher (Mar 03)