BGP with 2 ISP with advertisement different LAN pool

15 pts.
Tags:
BGP
Cisco 2811
ISP
I have BGP with 2 ISP's. Now I want my own half live IP pools to be advertised from one ISP and other live IP POOL from second ISP. How do I do it with Cisco 2811? I have done normal setup for BGP and it's working , but all live IP POOL are announcing from only ONE ISP and the other ISP link is vacant w/o use. Please suggest any extra configuration required.

Software/Hardware used:
CISCO 2811
ASKED: May 5, 2013  3:59 PM

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  • plizz
    The easy way is to advertise an other subnetmask. Sample: You have a /24 subnet. You can advertise /25 (part A, 0-127) to ISP 1 and /25 (part B, 128-255) to ISP 2. But you lose 2 IP address with this, 127 (broadcast) and 128 (Net ID). Other way is to use prefix list and route map to filter your BGP advertise to ISP 1 and ISP 2.
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