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Inter-Vlan Routing

 
ahandono2000
Occasional Contributor

Inter-Vlan Routing

I have 3COM 4500G 48 port.



What i'm going to do is creating 3 VLAN on single 3COM 4500G and setup vlan routing between those vlan.



So far this is what I already done :



1. Assign IP : 192.168.10.43 for interface VLAN 1



2. Create VLAN 2 & 3, VLAN 1 is default VLAN so no need to create.



3. Port #1 - #24 are assign to VLAN 1 (default) --> Planned for network 192.168.10.0/24



4. Port #25 - #36 are assign to VLAN 2 --> Planned for network 192.168.11.0/24



5. Port #37 - #48 are assign to VLAN 3 --> Planned for network 192.168.12.0/24



6. Add static routing on switch : 192.168.11.0 mask 255.255.255.0 to gateway 192.168.11.43



7. Add static routing on switch : 192.168.12.0 mask 255.255.255.0 to gateway 192.168.12.43



8. Assign IP : 192.168.11.43 to interface VLAN 2



9. Assign IP : 192.168.12.43 to interface VLAN 3



10. All port was set to ACCESS port



 



Now, on testing part....



PC A on VLAN 1 with IP : 192.168.10.5 gateway 192.168.10.43



PC B on VLAN 2 with IP : 192.168.11.5 gateway 192.168.11.43



PC C on VLAN 3 with IP : 192.168.12.5 gateway 192.168.12.43



 



PC A can ping to 192.168.11.43 but can't reach PC B



PC B can ping to 192.168.10.43 but also can't reach PC A



PC C has the same condition.



 



I see my routing is correct and the packet also can cross between vlan, but can;t reach designate PC.



Can someone point me a clue for this problem ?



 



2 REPLIES
Fred_Mancen_1
Super Advisor

Re: Inter-Vlan Routing

In multilayer switches the inter-vlan routing is automatic, because are directly connected networks. The inter-vlan routing is enabled when you assign a IP address to a VLAN interface and have a host connected to a port that belongs to this VLAN you created.



So you do not need to add static routes in the switch settings. Since you have hosts using each VLAN, its status in the output of  "display ip interface brief" command will be "UP", and you'll can ping among the hosts.



You just need to add static or default routes when using a next hop as a gateway or internet path.



ahandono2000
Occasional Contributor

Re: Inter-Vlan Routing

Hi Fred,



You are right..



I dont have to set ANY routing on switch since it will automatically created once the port on UP status.



I only need to set static route when using it as gateway (on PC side).



 



After I set static routing on the main router, i can access PC on both side...