Hi, I have some question which I am not sure of and I want to share with you.Hope someone it will give the right answers.1. What is the purpose of ICMP messages;2.What are the features of SNMP;3. What is the error message on ISDN debug :.........config stack, may not have password...4. If you want to implement BGP Multi-homed to two providers and you are AS3 , what you tell to both ISP's AS1 and AS7 to do in case you want to use AS1 as primary link and AS7as a backup link. AS4-----AS2------AS1-----AS3-------AS7-----AS5----AS6---- | | | -------------------------------------------------------------------- Thank you , for your help. Mike ------------------------------------------------------------------------ Get your FREE download of MSN Explorer at http://explorer.msn.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=5921&t=5921 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]