Hello, We have our AS and block of /21 and we are connected to two ISPs. One of them is the main, the other is backup. All traffic is going trough the main one and if it fails the backup is used. This behaviour was implemented by using prepending and works good.
I am thinking about load balancing between both ISPs. I have read about a technique when you divide your block to several pieces, for example to two /22 blocks and advertise one of them to one ISP and other block to another ISP and at the same time advertise whole prefix to both ISPs, /21 in this case. This leads to getting incoming traffic trough both providers and you can control which subnets in your AS connect to Internet trough which ISP. My question: is this scheme used widely and would this scheme work well in real Internet for /22 prefixes, for /23? For example, is there any possibility to loose connectivity to some parts of Internet in case of filtering of long prefixes by Internet Providers? Are there other drawbacks of this? Thanks in advance for any ideas and advises, -- Roman Bestuzhev, System Administrator _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/