gurkamal01 wrote:
Hi,
I am  trying to know how routing works. Please bear with me
For eg --I have L2 switch attched to the core1.
L2 switch has default gateway of 192.168.253.1 (this sits on core 1 as an SVI)
Core 3 has L2 Swi hanging off with vlan 230 SVI. 
Core 1 & Core 2 do not have vlan 230 on it
L2 Swi1 has vlan 253 and vlan 230 
Core 1 has access connection of vlan 253 to core 2 and core 2 has access connection of vlan253 to core 3 .All core switches have Ospf running .
L2 Swi1<-------vlan253 ------>Core 1 <---------->vlan 253<---------->Core 2<---------vlan 253--------> Core3------------L2 Swi2 (vlan 230)
Q1 when L2 Swi1 sends traffic for vlan 230 to Default gateway Core 1 how can it reach L2 Swi2 off of core 3 ie . where do i need put SVI in order for packet   to reach destination of vlan 230  at Swi2. I don't want to create trunks in the core.
Q2 Is this possible thru routing or the only way to go is thru trunks or access connections.  Do i need vlan 230 on  Core 1  & Core 2  in order for this to work?
Q3 If possible thru routing can anybody please explain the  configuration i need to put on the core or switches?
Please Advice
I wll appreciate it.

Hi,

Q1 for vlan 253 you should put the SVI in core-1 switch. Also for vlan 230 you should put the SVI on core-3 If you have any vlan hanging off of core-2 then put the SVI for that vlan in core-2.   You will also need to deploy /30 subnets between all you core devices

Depending on the type switch you have you can then run a routing protocol like OSPF, RIP or ISIS between core-1, core-2 and core-3.

HTH

Reza