Gradual conversion from flat network to VLAN network
Posted on 2014-03-21
I need to be able to gradually convert to a non-flat network. I'm attempting to get the core switches configured to allow the new VLANs while still passing the flat vlan1 traffic to the gateway.
Core Switch: 3com 5500G
Flat Network Gateway: Cisco 3500 router (172.16.0.1 main IP -- 10.254.254.2 secondary IP)
[5500G-EI]display ip routing-table
Routing Table: public net
Destination/Mask Protocol Pre Cost Nexthop Interface
10.254.253.0/24 DIRECT 0 0 10.254.253.1 Vlan-interface1
10.254.253.1/32 DIRECT 0 0 127.0.0.1 InLoopBack0
10.254.254.0/24 DIRECT 0 0 10.254.254.1 Vlan-interface254
10.254.254.1/32 DIRECT 0 0 127.0.0.1 InLoopBack0
127.0.0.0/8 DIRECT 0 0 127.0.0.1 InLoopBack0
127.0.0.1/32 DIRECT 0 0 127.0.0.1 InLoopBack0
172.16.0.0/20 DIRECT 0 0 172.16.0.252 Vlan-interface1
172.16.0.252/32 DIRECT 0 0 127.0.0.1 InLoopBack0
I've hit a bump in the road early in the process. I've added VLANs to the 5500G switch and connected my workstation to that switch. The trunk ports on the 5500G are in trunk mode and set to allow all vlans.
gi1/0/1 on the 5500G switch is an access port on vlan 254.
When connected to gi1/0/1 on my workstation, I set an ip address of 10.254.254.20/24 with gateway 10.254.254.1
I can then ping 10.254.254.1, 10.254.253.1, and 172.16.0.252.
I can not ping 172.16.0.1 or 10.254.254.2
From the 5500G switch, I can ping 172.16.0.1 but I can not ping 10.254.254.2
I was thinking a static route on the 5500G, but my attempts at doing this didn't make a difference. If there is any easier way to accomplish this please let me know.