Can someone tell me what ip base version does and Sp services version does.. in most cases which is the best option under which circumstance please, thank you.
Here we talking about an 1841 series router e.g 12.3 ip base and 12.4 sp services..
IP Base and SP Base refer to feature package so it really depends which feature you want to use. For example SP Base includes MPLS which are not included in the IP base.
