Re: Using DNS for SSM

[Dino Farinacci <dino@procket.com>]

>> So I'm trying to imagine how all of this fits together.  How does the
>> customer get the SSM DNS name so that it can tell the NOC?  Would the

    They move their cursor over the URL in their browser.

>> So you invoke mtrace like this
>> 
>>       mtrace kqed.radio.example.com  customer.broken-dsl.com
>> 
>> The first thing that mtrace does is to resolve kqed.radio.example.com
>> and get back an A record that says that kqed.radio.example.com maps to
>> 232.1.2.3.  mtrace knows this is an SSM destination address and then
>> strips off the component of the DNS name (kqed) to find the DNS name
>> of the source, radio.example.com which it then resolves to get the
>> source address.  I just wrote a perl script in about ten minutes that
>> does this.

    We've been doing this for years already! But with SSM the group address
    is local to the source and is only significant to the source.

Dino