[rbridge] suggested minor tweak to align TRILL documents
d3e3e3 at gmail.com
Mon Feb 23 18:22:36 PST 2009
The suggested change in protocol specification text seems reasonable. I also
prefer the first of the two options given for changed text. Does anyone
On Thu, Feb 19, 2009 at 3:01 PM, James Carlson <james.d.carlson at sun.com>wrote:
> I-D protocol-11 says this on page 35:
> 6. If the sender is DRB, the Rbridges (including itself) that it
> appoints as forwarders for that link and the VLANs for which it
> appoints them.
> Note the "including itself" phrase, which indicates that the list must
> be explicit. I-D isis-02 says this:
> An RBridge's nickname may occur as appointed forwarder for
> multiple VLAN ranges within the same or different Port Capability
> TLVs within a DRB's Hello. In the absence of appointed forwarder
> subTLVs referring to a VLAN, the DRB acts as the appointed
> forwarder for that VLAN if end station service is enabled.
> Note the "in the absence of" clause. This latter spec would allow a
> sender to omit any cases where the AF is the DRB, potentially omitting
> the option entirely if all AFs are the DRB. This seems a lot more
> reasonable to me than the -11 language, which requires a "dummy"
> option for the most obvious case.
> This is especially so, as there's really nothing useful that anyone
> else listening to this message could garner from hearing the DRB
> appoint itself as AF. Those other (non-designated) RBs need to hear
> if they're being tapped as AF, but they don't need to do anything if
> the DRB is AF.
> Any chance we can update the protocol-11 language to conform to the
> isis-02 text? Suggestions would be either:
> 6. If the sender is DRB, the Rbridges (excluding itself) that it
> 6. If the sender is DRB, the Rbridges that it appoints as
> forwarders for that link and the VLANs for which it appoints
> them. Where the appointed forwarder is the DRB, the VLANs need
> not be listed explicitly.
> (I like the former better, as it makes the expected result more
> obvious, but the latter works, too.)
> James Carlson, Solaris Networking <james.d.carlson at sun.com>
> Sun Microsystems / 35 Network Drive 71.232W Vox +1 781 442 2084
> MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442 1677
> rbridge mailing list
> rbridge at postel.org
Donald E. Eastlake 3rd +1-508-634-2066 (home)
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d3e3e3 at gmail.com
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