[trill] Order of bits in TRILL bitmaps

[Petr Hroudný <[e-mail]>]

Hi all,

I'm looking for the WG opinion about the correct order of bits in bitmaps
specified in RFC7176 sections 2.2.2 & 2.2.5 and 2.2.4 & 2.3.1.

For the first two, the RFC says:

   o  VLAN bit-map: The highest-order bit indicates the VLAN equal to
      the start VLAN ID, the next highest bit indicates the VLAN equal
      to start VLAN ID + 1, continuing to the end of the VLAN bit-map
      field.

I understand this as follows: if only the start VLAN ID is enabled,
the bitmap should have a value of 0x80.

Nevertheless, I've seen an implementation, where the bitmap reads 0x01.

Which one is correct?


For the second two, the RFC says:

   o  Capabilities and Header Flags Supported: A bit vector of 32 bits
      numbered 0 through 31 in network order.

I understand this as follows: if I want to set the FGL-safe bit (bit
1), the bitmap should read 0x40 0x00 0x00 0x00.

Nevertheless, I've seen an implementation, where the bitmap reads
0x00, 0x00, 0x00, 0x40

Which one is correct?


As this might create a serious interop issues, I'm seeking for WG
opinion on this.



    Thanks, Petr