Hi Peter,
the draft lists about 5 different *example* applications which COULD
be addressed by node admin tags. So if you take 1 particular possible
scenario out of the draft - you still have 4 possible applications.
Examples are there to demonstrate that admin tags is useful general
tool, not to require the solution.
Sure, each of possible scenarios can be solved by tailored solution.
But each tailored solution is required to go via IETF adoption and
implementation by vendors. And indeed, in cases where tailored solution
brings so much operational benefit that it warrants slow path of IETF
adoption, feature development by multiple vendors and network deployment
- it will be used and will kill desire to solve the problem with admin tags.
And vice verse - tags (when widely supported) will facilitate rapid
development and deployment of services which we otherwise can't (or
slow) to offer.
As for your particular example - operator still has to go to each
and every device and enable Remote LFA on it. But we are not trying to
solve this operational complexity with OSPF autoconfiguration. So it
shouldn't be that complex to enable acceptable node tag at the same time
as enabling rLFA itself.
Anton
On 08/26/2014 10:05 AM, Peter Psenak wrote:
On 8/25/14 23:18 , Acee Lindem (acee) wrote:
There are situations where node level policy is required and an OSPF
advertised admin tag simplifies this. For example, advertisement of
remote-LFA eligibility.
my concern with the generic use of admin tags for signaling capability
is that it's operationally unfriendly compared to explicit signaling of
the capability (e.g. using a bit or a TLV). The reason is that you have
to configure the tag meaning on all receiving routers.
thanks,
Peter
Please indicate your support or objections to adopting this draft as an
OSPF WG document.
Thanks,
Acee
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