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New Member

Extended VLANs and VTP

Hello,

If I were to configure VLANs above 1025(extended VLANs), can I configure VTP in this case?

Best, ~sK             

4 ACCEPTED SOLUTIONS

Accepted Solutions

Re: Extended VLANs and VTP

No you cannot.

You can configure normal-range VLANs (2 through 1000) when the switch is in either VTP server or transparent mode. However, you can only configure extended-range VLANs (1025 through 4094) in VTP transparent switches.

http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613.shtml#conf-vtp

Cisco Employee

Re: Extended VLANs and VTP

Collin,

This limitation is valid only for VTPv1 and VTPv2. With VTPv3, you can carry both normal and extended range VLANs just fine.

Best regards,

Peter

Cisco Employee

Re: Extended VLANs and VTP

Collin,

Whether or not using VTPv3 is a wise thing is another issue, but to maintain technical accuracy, it was necessary to point out that VTPv3 does indeed support extended range VLANs, Private VLANs and other cute things.

Interestingly enough, VTPv3 has been supported for quite some time in old CatOS. However, it was carried over to IOS, especially that on 2960 and similar Catalysts, only a few years ago.

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/solution_guide_c78_508010.html

Best regards,

Peter

Re: Extended VLANs and VTP

Correct, you do not need to worry about MAC address reduction.

8 REPLIES

Re: Extended VLANs and VTP

No you cannot.

You can configure normal-range VLANs (2 through 1000) when the switch is in either VTP server or transparent mode. However, you can only configure extended-range VLANs (1025 through 4094) in VTP transparent switches.

http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613.shtml#conf-vtp

Cisco Employee

Re: Extended VLANs and VTP

Collin,

This limitation is valid only for VTPv1 and VTPv2. With VTPv3, you can carry both normal and extended range VLANs just fine.

Best regards,

Peter

Re: Extended VLANs and VTP

Peter-  I can't believe people still use VTP!! I have not used it in so long I didn't even know there was a version 3.

Cisco Employee

Re: Extended VLANs and VTP

Collin,

Whether or not using VTPv3 is a wise thing is another issue, but to maintain technical accuracy, it was necessary to point out that VTPv3 does indeed support extended range VLANs, Private VLANs and other cute things.

Interestingly enough, VTPv3 has been supported for quite some time in old CatOS. However, it was carried over to IOS, especially that on 2960 and similar Catalysts, only a few years ago.

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/solution_guide_c78_508010.html

Best regards,

Peter

New Member

Extended VLANs and VTP

Thanks for the quick response, Clark!

I got confused after reading the the link below where it mentioned that one of requirments to use extended VLANs one has to enable the MAC address reduction. Not sure if I am clearn on this. Could someone kindly clarify?

http://www.informit.com/library/content.aspx?b=CCNP_Studies_Switching&seqNum=20

Much appreciated.

Best, ~sK

New Member

Extended VLANs and VTP

wow... posted the above before reviewing Peter's post. So, I can use extended VLANs with VTP v3. That's great!

So, I guess I don't have to worry about dealing with the MAC address reduction feature, correct?

Best, ~sK

Re: Extended VLANs and VTP

Correct, you do not need to worry about MAC address reduction.

New Member

Extended VLANs and VTP

Thanks to both of you!

Best, ~sK

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