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The IP Routing Process for VLAN's?

mwest1956
Level 1
Level 1

I have the CCNA Study Guide third edition. Chapter five, page 254 has a description of the ip routing process.  It descripes the ip routing process using two nodes on different subnets and a router.

We've recently deployed VLAN's, so I'm asking if I replace the router with a switch in the description, if the principles would still apply?  I'm also asking if someone knows of a link that describes the ip routing process when using a VLAN?  I'm looking for documentation that's similar to what's in the book, but modernized.

tia

2 Replies 2

eduardopozo56
Level 1
Level 1

I do not have the book but i will try to help:

Switches dont do inter-vlan routing (Unless you are using a layer 3 switch) so if you are have different Vlans configured on your switch and want them to comunicate each other without a router you cant.

If you have a router the same principles apply to normal routing, remember that VLANS are just a way of dividing your clients, so your VLANS configured on your subinterfaces will appear directly connected on your ip route table. For example:

VLAN 10: 192.168.10.0

VLAN 20: 192.168.20.0

VLAN 30: 192.168.30.0

You have vlan 10 and 20 locally on a lan interface (They will be directly connected on your ip route) but vlan 30 is reachable thru a serial interface (ppp or frame relay) you would use:

ip route 192.168.30.0 255.255.255.0 serialx/x