I am using a Cisco 2620 router. It currently has 64MB of DRAM and 16Mb of flash. I am going to use IOS 12.3.22. Will this router support BGP in that configuration? Do I need more DRAM and Flash memory?
Yes it should do it.
you are welcomed, and please check the attached diagram for IOS feature sets.
HTH, please rate if it does help,