I have a newbie question (I might bein over my head, please be gentle)
My ISP has built a MPLS network for me and all has been simple so far connecting everything together. They have supplied me with C1921 routers and configured the default gateways so I could just program network cards etc to point at the internet. This has all gone well. The final challenge I face is to setup my head office. To me this is a slightly complicated issue as we have four completely seperate domains on site. They all need to talk to each other but each has its own DNS and DHCP.
I was instructed to get a layer 3 managed switch and purchased the SG300-10. The ISP has configured the router (C1921) with four default gateways and tagged each one. I understand the tagging of Vlans and how to allocate the ports. Where i am a little stuck is the interconnection between C1921 and SG300-10 to allow internet connection to all Vlans. I have looked for information everywhere but had little success. The main problem seems to be no connectivity from SG300-10 to router, none of the gateways are pingable from SG300-10. I am guessing my issue is i need to setup a port for the router connection ? How do I achieve this ?
Sorry if this question is a little dumb, never had to use managed switching before and there is a slight learning curve.
I appreciate any help you guys could supply.