[c-nsp] 802.1q VLANs > 1000 on Cat 5500

[Jeff Kell]

Rick Ernst wrote:

> I am running VLAN transparent. It's almost looking like the entire 5500 is
> ISL.  I came across something on Google where it says that earlier IOS and
> devices are actually doing ISL under-the-hood for the dot1q implementation.
> "earlier" is not defined, but it's looking like 12.2 or 12.3 is the
> earliest image that has support for the full range.  I don't know if CatOS
> supports it directly, since the 5500 has been EOLd.

CatOS at least back to 5.1(2) supports dot1Q:

> UTC-5500> (enable) sho trunk
> * - indicates vtp domain mismatch
> Port      Mode         Encapsulation  Status        Native vlan
> --------  -----------  -------------  ------------  -----------
>  1/1      on           dot1q          trunking      1
>  3/3      on           dot1q          trunking      1
>  3/4      nonegotiate  isl            trunking      1
>  3/6      nonegotiate  isl            trunking      1

This is a fairly "straight" 5500 (no RSM, only NFFC-II cards).

Jeff