On Sat, 20 Oct 2001, Miguel A.L. Paraz wrote: > cc:ing ph-isp... for the more OS-independent and IP-centric discussion... > > > On Fri, Oct 19, 2001 at 02:47:21PM +0800, Ian C. Sison wrote: > > TO do BGP, you will need an AN from APNIC. QUite overkill for a small > > office. > > > actually that is a recurring debate at NANOG (North American Network Operators) > group... that since it is easy to get redundant connections now, why is it > hard by design to be multihomed on the IP level (requiring ASN and independent > space)... and that an IPv6 technique should make it easy to multihome. > > without IP-level multihoming, the kernel 2.2.4 NAT should be capable, but I > have no live experience with it. >
No only NAT. You need to use route-by-source and equal cost multipath in order for you to make use of the IP block provided by your upstream providers. route by source is necessary because upstream providers do that ingress filtering will deny 'passage' of ip addresses that don't belong to its pool. Remember that the usual way is have one default route and all traffic goes towards that route. If an ip connection is started on the interface that does not carry the default route, the server won't be able to respond to it. Why? Because the default route router will block the traffic as it originates from an 'alien' ip. Remember i asked you about this once Migs, it took me quite a while to get this figured out. My solution was to use the linux kernel advance router, equal cost multipath, and the iproute2 package. This is why for most 'end-user' LANs (which can have several links to the net nowadays (Leased Line, DSL, Cable, Dialup, Wireless) Linux is still the best solution, and not a Cisco. _ Philippine Linux Users Group. Web site and archives at http://plug.linux.org.ph To leave: send "unsubscribe" in the body to [EMAIL PROTECTED] To subscribe to the Linux Newbies' List: send "subscribe" in the body to [EMAIL PROTECTED]
