Hi guys,

I am trying to migrate my webservers from one ISP to another, hence a need to change the IP. As I have sufficient network ports, I went ahead to set eth1 as the new IP, with the new gateway specified in the ifcfg-eth1 file.

The ifcfg-eth0 file contains the current ISP information.

eth0 is connected to a router, which gets its routing table via BGP from the ISP.

eth1 is connected directly to the new ISP.

Interestingly, once I configured appropriately, even before DNS change, my site cannot be accessed on the original IP (eth0). But if I configure my host file to direct the domain to the new IP, it will load.

Somehow, after inserting eth1 settings, eth0 will stop responding.

I have done this kind of migration before, and it went fine.
Not sure if I did anything wrong this time, but I was wondering if the BGP is an issue? First time I am dealing with BGP.

Also.. I tried specifying 2 gateways, one in each ifcfg file... though even without it I have no luck.

You guys any idea? Trying to do a migration as transparent as possible.

hi guys,

i found out the problem is because after setting appropriate settings, the default gateway is my eth1. hence the failure for the current isp.

I remove the gateway from eth1, and everything work fine. I can access the site via both IP. question now is, can I specify separate gateway for each interface?

With my current setup, it just mean all traffic coming in from eth1, is going out eth0 right?

guys.. so is it possible to have 2 intereface with 2 different gateways? I tried doing that but things won't work properly without a default gateway it seems...