we have 2 3750 switches that do not have VTP running on them. one has 4 VLANs configured on it. the vlans talk to eachother via ACLs in the switch. now I need to install another 3750 switch with basically the same senario. I have tried getting vlans 1 and 301 to talk to each other via ACLs on the switch. but the problem I keep running into is I can either shutdown ALL of the traffic or open the flood gates.
I have ip routing enabled. and trunking is enabled and vlan 301 is being trunked.
Do I need VTP running? FYI...the other switch that's supporting VLANs doesn't have it running.
the IP in 301 that needs to be seen from any IP vlan 1 is 10.35.44.22
Where is the Layer 3 routing done ? on the Core ? If so, you need to configure VACL (VLAN ACL) to restrict traffic through VLANs... Its just like a normal layer 3 access-list.. permit all the networks which needs access and deny the rest... you need to apply this onto your VLAN interface...
VTP is basically required to propogate VLAN information between the core and the edge switches.. it has nothing to do with data transport or routing... If you do not have VTP running, you need to manually add all the VLANs on your new 3750 switch and trunk the traffic to the core.. this will make things work for you...
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