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.
Hey so they have configured 4 gateways for each vlan all set under 1 physical interface on the 1921 is that correct ? If thats the case you only needed a layer 2 switch as its a router and stick setup and your side trunked
Your switch port connecting to the router needs to be a trunk allowing all layer 2 vlans up to it
heres a concept should be easy to follow if thats what they have done.
You need to connect your switch to C1921. I suppose you connect interface GE28 to 1921.
Follow these steps
You need to create 4 VLANs. The VLAN-IDs must be the same as 1921 IDs.
Interface GE28 [Please check interfaces names ]
descrition connects to 1921
switchport encapsulation dot1q
switchport mode trunk
3- You need to group your computers and assign them to to each VLAN. You may use only one vlan for everyone depending on your policy. I suppose you have 5 computers assigning to VLAN 10. Their default Gateway corresponding to VLAN 10 is set on 1921 .
I suppose 192.168.10.1 255.255.255.0 is set on 1921 for VLAN 10
interface range gi1-5
switchport mode access
switchport access VLAN 10
[ configure computer 1 IP 192.168.10.2 with default gateway 192.168.10.1]
[ configure computer 2 IP 192.168.10.3 with default gateway 192.168.10.1]
and so on
6 computer in VLAN 20
I suppose 192.168.20.1 255.255.255.0 is set on 1921 for VLAN 20
interface range gi6-11
switchport mode access
switchport access VLAN 20
[ computer 6 192.168.20.2 with default gateway 192.168.20.1]
[ computer 7 192.168.20.3 with default gateway 192.168.20.1]
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