This is a repost from a week ago.  Ive attached my network diagram and running configs of the switches and routers within my lab network.  My issue is when I start using the serial interfaces on my 2621xm router and 2620 router I cannot get out to th...

I have a lab setup to help me take my CCNA and CCNP and Im having issues trying to get WAN connectivity back to a swictch at the end of my network.  My lab envoirnment consists of 1 - 2950 switch, 1 - 2620 and 1 - 2621XM.  I have 1 ethernet connectio...