Please refer to the network diagram below, it is a very simplified version of an actual network installation.
The Router has 3 Vlans, OSPF has been configured and all the 3 vlans have been added to Area 0 so they can communicate with each other. The Switch is a PnP Layer 2 managed switch.
With the current setup, we are facing an issue: End Device 1 cannot communicate with End Device 2. However, if we break the link between the Switch and Vlan2, the 2 End Devices are able to communicate with each other.
Can somebody please explain why this phenomenon is occuring, and how it can be solved while maintaining both the connections from the switch to the router.
The Router is an Extreme Summit X450a device. Refer to the sample config below:
create vlan “VLAN1” configure vlan VLAN1 tag 10 configure vlan VLAN1 add ports 1-4 untagged configure vlan VLAN1 ipaddress 10.0.0.1 255.255.255.0 create vlan “VLAN2” configure vlan VLAN2 tag 20 configure vlan VLAN2 add ports 5-8 untagged configure vlan VLAN2 ipaddress 10.0.1.1 255.255.255.0 create vlan “VLAN3” configure vlan VLAN3 tag 30 configure vlan VLAN3 add ports 9-12 untagged configure vlan VLAN3 ipaddress 10.0.2.1 255.255.255.0 enable ipforwarding vlan VLAN1 enable ipforwarding vlan VLAN2 enable ipforwarding vlan VLAN3 enable ipmcforwarding vlan VLAN1 enable ipmcforwarding vlan VLAN2 enable ipmcforwarding vlan VLAN3 configure ospf routerid 10.0.2.1 enable ospf configure ospf add vlan VLAN1 area 0.0.0.0 configure ospf add vlan VLAN2 area 0.0.0.0 configure ospf add vlan VLAN3 area 0.0.0.0 configure pim add vlan VLAN1 dense configure pim add vlan VLAN2 dense configure pim add vlan VLAN3 dense enable pim