6500 dot1q 1 native rejected

[eknell]

I am in the process of replaceing 2 7206VXR's for a 6509 SUP2/MSFC2 running Native IOS 12.2.18-SXF6.

The issue I am having is when I try to add "encapsulation dot1q 1 native" to one of my sub-interface's, I get an error that states "Command rejected: VLAN1 cannot be allocated because it is the default vlan". I need to be able to set this because I have managment blocks in vlan 1, that will need a place to route to.

7206VXR Int Conf:

interface GigabitEthernet0/1.1

encapsulation dot1Q 1 native

ip address 172.16.16.1 255.255.254.0 secondary

ip address 172.16.18.1 255.255.254.0 secondary

ip address 172.16.0.1 255.255.255.192 secondary

ip address 64.207.239.1 255.255.255.0

no ip unreachables

no ip proxy-arp

ip nat inside

I know there has to be an easy explanation...I am just not used to setting up a 6509 soley to handle all my layer 3 routing... Thanks for your help!

[sourabhagarwal]

can you try to configure only "encapsulation dot1Q 1" under gi0/1.1 sub-interface.

I guess it will enable IEEE 802.1Q encapsulation of traffic on a specified subinterface in VLANs, and defaults the associated VLAN as a native VLAN.

check this URL to see if you can get more information on this.

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fswtch_c/swprt6/xcfvl80q.htm#wp1007689

hope it helps .... rate if it does ....

[eknell]

I tried that as well on my G2/1.1 (switch interface) and I still got the same error?

[m_breuer]

Hi Ethan,

this configuration is not supported, because you have to follow these rules:

Because VLAN IDs are global to the switch, you can use a VLAN internally, on a subinterface, or with a Layer 3 VLAN interface.

?You cannot configure an internal VLAN on a subinterface or a Layer 3 VLAN interface.

?You cannot configure a subinterface VLAN on a Layer 3 VLAN interface.

?You cannot configure a VLAN used with a Layer 3 VLAN interface on a subinterface.

Note You cannot configure a VLAN used on one interface or subinterface on another interface or subinterface.

see: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/122sx/swcg/layer3.htm

I assume the default VLAN will be considered as internal and thus you will break these rules.

You have put your IP configuration on a VLAN interface.

Cheers,

Michael

[eknell]

Yes, I have seen this article. The problem is, I do not want this 6509 to have any STP instances, or know anything about VLANS....period. The only thing this switch will be doing is acting as a router, that is it. There has got to be a way to delete or get rid of VLAN1 on this switch, or turn off the layer 2 aspects all together?

[mark.edwards]

Hi, So the config you have posted is for your 7206 and you want to transfer this to your 6509? I'm also assuming that the main interface on 7206 GE0/1 is a trunk interface

I dounbt you'll be able to setup subinterfaces on the 6509. You should really set this up as a trunk interface and route using VLAN interface on the 6509.

[eknell]

Mark,

Actually, if you load any of IOS code in the 12.2.SX train, you do have the capabilities to create sub-interfaces on you 6509.

And yes, I am basically taking the configs off a couple 7206's, combining them, and trying to get the 6509 to do it all. The G0/1.1 int config I posted, was the problem child on my 6509. Thanks!