Raghaw, >From your email , I understand you got a new IP pool & want to migrate to new pool without any service interruption.
As it seems you have only one service provider , you may not be getting internet bgp routes ( AS etc...) upto your end. First check how many servers are there to be accessible from outside. You have to change DNS records to the new IP addresses. For the time being place a NAT rule for traffic coming from new ISP link to the existing IP addresses of Servers. Once DNS update is done by your providers , you can change server IP addresses to new range & remove NAT. For outgoing traffic it's just a change of default route. You can use a SLA based tracked route if you are not sure about new ISP for some time. As somebody cocerned about BGP; If you have an AS number , check what's your subnet mask of IP address range. Usually your ISP will advertise your range only if you advertise to ISP. But there's a practical reason to block small subnets being advertised to avoid global internet BGP table become unnecessarily huge. When both ISPs are up just prepend AS path or some attributes to artificially select preferred ISP. HTH On Wed, Jun 13, 2012 at 9:43 AM, Raghav Gurung <[email protected]>wrote: > Hi, > > i am planing to change my service provider, i have already an IP pool given > by the old ISP, now i am planning to change the whole IP pool given by the > New SP. > > can any one let me know what need to be taken care and how to do it > seamlessly. > > -- > Regd > Raghav Gurung > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com <http://www.platinumplacement.com/> > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
