Router on stick

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Hi Guys,

I have tried this Config in my home lab , I cant seem to ping the router, however I can ping the subinterfaces assigned to vlans

Following is the config I ve used on 24 port 2500 xl switch,

Fa0/1 trunk port= full duplex, switchport mode trunk, switchport trunk encap dot1q 1, switchport access all vlans
Fa0/2-fa0/8 vlan 2 10.10.1.1 /24 switchport access vlan 2, spanning-tree portfast
Fa0/9-fa0/16 vlan 3 172.16.20.1/24 switchport access vlan 3, spanning-tree portfast
Fa017-fa0/24 vlan 4 172.16.30.1/24 switchport access vlan 4, spanning-tree portfast

Router e0/0.1 ip 192.168.10.1/24 encap dot1q + native
Switch ip 192.168.10.2/24
Switch dg 192.168.10.1

There seems to activity on both ports ie the switch and router Ethernet ports.
- on vlan database , added vtp domain + all the vlans
- on router e0/0 no ip address , no shut,
- on all other sub-interfaces, encap dot1q, no shut + respective ip addresses shown above
- the router is 2610 with 12.3 IOS
- switch has got 12.0 ios

when I check the interfaces , all protocols are up interfaces are up.

PS: the ip addresses are just for the ref to vlans in above explanation,they are allocated on router ie e0/0.2 =10.10.1.1 and so on..

 

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I'm not sure I'm seeing your set up properly - but AFAIK the native vlan needs to be the e0/0 interface on the router, and it must have an IP address (not a sub-interface).

(With ISL you can get away with the e0/0 not having an IP address, but then you don't use the native vlan of course)

 

purplejaze,

How many VLANs do you have?

 

3 + the native,

Macallan do you suggest that I give an Ip add to e0/0 and then allocate subinterfaces ?

 

purplejade,

Questions:

1. What subnet address have you assigned to the native VLAN?
2. What subnet address have you assigned to the first VLAN?
3. What subnet address have you assigned to the second VLAN?
4. What subnet address have you assigned to the third VLAN?

 

Yep:

For the e0/0 interface, give it the same subnet as the native vlan, and an IP address in that subnet.
For the subinterfaces, each has its own subnet (= vlan), and IP address
And of course you use the encap dot1q command for each (sub)interface, specifying the vlan number.

HTH