VLAN's and router

[Dougieoz]

Hi all,
I was wondering if someone could shed some light on this for me?
If i have a single 2950 switch and 2600 router setup, and want to setup the router to forward between 3 VLAN's created on the switch, do i setup the connection to the router as a trunk or leave as normal port?

 

[Jsteve]

Trunk

Trunks will pass Multiple Vlans.
Normal access link only passes one vlan.

 

[Dougieoz]

Thanks

 

[GSTEFANICK]

Also keep in mnd your 2600 needs to have a fa to do vlan / trucking routing

 

[KiscoKid]

Hi you need something like the following

On the router:

int fa0/0.2
ip address x.x.x.x
encapsulation dot1q 2
int fa0/0.3
ip address y.y.y.y
encapsulation dot1q 3

On the switch:

int fa0/1
switchport mode trunk

where x.x.x.x is the default gateway for VLAN2 and y.y.y.y is the default gateway for VLAN3 (this assumes the switch already has VLANs 3 and 4 created.)

Hope this helps

 

[Cluebird]

The 2600 does not need fastethernet to do router-on-a-stick if you have the right IOS. Other platforms require fastethernet. When you configure the subinterfaces on the router you need to specify the encapsulation before you try to assign an IP address to the subif.