ISP A asked me which 2 ARIN class C's I wanted to advertise. I told them xxx.yyy.216.0 and xxx.yyy.217.0. Then they came back and said, did you want us to announce the 2 /24's or the /23? I thought, isn't this up to me? I'm the one who configures it on my end. For example, I can use the aggregate command if I want to advertise the /23, and I can leave out the aggregate command if I want to advertise the 2 /24's. router bgp zzz network xxx.yyy.216.0 {advertise the Class C address to the Internet} network xxx.yyy.217.0 {advertise the Class C address to the Internet} ! aggregate-address xxx.216.0.0 255.255.254.0 summary-only {send the summary route/aggregate route vs. individual routes} I figure it's best to use the aggregate command to keep the ISP/Internet routing tables down. Is this good strategy to use the above config when I do the multihoming/backup/load share thing (have another router configured exactly the same way, but to ISP B? Jennifer L. Mellone _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]