[c-nsp] IS-IS Ethertype

[Justin Shore]

Hey guys.  I hope you all had a good holiday break.

Does anyone know for sure what the Ethertype is for the CLNS packets? 
I've found a couple IEFT drafts that talk about it it to a degree:

http://tools.ietf.org/html/draft-ietf-isis-ext-eth-01
http://tools.ietf.org/html/draft-ietf-isis-ext-eth-01

They imply that for packet sizes under 1500 that CLNS uses the standard 
IEEE 802.3 ethertypes.  The drafts specifically address packets over 
1500 bytes though.  One suggests 0x8872 and the other suggests 0x8870. 
I can't find anything definitive though.

I'm trying to think what all could affect the Ethertype for IS-IS.  MPLS 
won't.  LAGs might (I can't find anything about Ethertype for PAgP or 
LACP either).  Nothing else comes to mind though.

Can anyone tell me for sure what the Ethertype is on IS-IS packets?

Thanks
  Justin