I am interested in knowing the technique that people use to do such migration. Would you allow paths to both ISP's and do some prepending of routes or other metric manipulation to allow for load sharing during the migration, having the entire network migrated in a long and meticulous process? Would you migrate from the bottom up meaning workstations and hosts first then border routers last? Would you migrate one section of the network at a time? Meaning all hosts and switch the routing to the ISP all at once? Would you do it another way? Thanks -----Original Message----- From: Howard C. Berkowitz [mailto:[EMAIL PROTECTED]] Sent: Wednesday, March 14, 2001 7:17 AM To: [EMAIL PROTECTED] Subject: Re: ISP related question >All, > >A simple question for those who have related exprience/knowledge: >If we want to switch to another ISP, how soon we need to finish our >readdressing? There's no formal rule, although 30-60 days typically can get negotiated. As a side comment, remember that when you do switch, it's probably worth assuming you will need at least 5 days for the old address to purge out of DNS caches. The great majority of cache entries will clear much faster than that, but there will always be some that take a while. >I understand as our current address is assigned by our current ISP, we need >to give back this address and migrate to a new range coming from our new >ISP, we definitely want to how sufficient time for this process, just want >to know how long most of the ISP allows for this kind mirgration. We have a >/16 address currently. > >Thanks > >JP -- "What Problem are you trying to solve?" ***send Cisco questions to the list, so all can benefit -- not directly to me*** Howard C. Berkowitz [EMAIL PROTECTED] Technical Director, CertificationZone.com Senior Mgr. IP Protocols & Algorithms, Advanced Technology Investments, NortelNetworks (for ID only) but Cisco stockholder! "retired" Certified Cisco Systems Instructor (CID) #93005 _________________________________ 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]
