Dear all I want to establish a pair of DHCP to centralized allocate IP addresses to several AS5800 and AS5300. 1/ OSPF appoach I've tried OSPF to advertise connected IP from AS5800/5300 to outside network. However, the routing table exchange, due to async interface up / down, making the DR, BDR, AS5300 and AS5300 very busy. 2/ NAT appoach NAT is not considered because it does not support ICQ. Do anyone know other better appoach to centralized allocate IP address? (No. of genuine IP is less than no. of async port) Regards HI fI _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]