Hi Ron, 2017-10-30 16:13 GMT+01:00 Ron Bonica <[email protected]>:
> Jean-Michele, > > Thanks for the thoughtful review. I will post a new version addressing > your comments today or tomorrow. > > Responses inline...... > > Ron > > <snip> > > > > > 3. ICMP Extended Echo Reply > > > > <snip> > > > > o F (IPv4) - The F-bit is set if the A-bit is also set and IPv4 is > running on the > > probed interface. Otherwise, the F-bit is clear. > > > > o S (IPv6) - The S-bit is set if the A-bit is also set and IPv6 is > running on the > > probed interface. Otherwise, the S-bit is clear. > > > > o E (Ethernet) - The E-bit is set if the A-bit is also set and IPv4 is > running on > > the probed interface. Otherwise, the E-bit is clear. > > > > <JMC> > > Question: > > Why IPv4 must also run to have the E-bit set? > > Question: > > Why the E-bit is not set if IPv4 is not running and IPv6 is running? > > </JMC> > [RB ] > > This was a typo. I meant to say: > > 0 E (Ethernet) - The E-bit is set if the A-bit is also set and Ethernet > is running on the probed interface. Otherwise, the E-bit is clear. > <JMC> OK. </JMC> > > > > > > 4. ICMP Message Processing > > > > <snip> > > > > o Set the Code field as described Section 4.1 > > > > o If the Code Field is equal to No Error (0) and the L-bit is clear, > > set the A-Bit. > > > > o If the Code Field is equal to No Error (0) and the L-bit is set > > and the probed interface is active, set the A-bit. > > > > <JMC> > > Question: > > Why the A-bit is not set when Code Field is equal to Multiple Interfaces > > Satisfy Query (3) and the L-bit is clear? Question: Same question when > L-bit is > > set. </JMC> > > > > <snip> > > > [RB ] > > Error code 3 (Multiple Interfaces Satisfy Query) means that they query is > ambiguous. Or, on other words, that two or more interfaces satisfy the > match conditions specified by the query. So, we can't set the A, F, S or E > bits because we don't know which interface the user is asking about. > <JMC> But, even if this is ambiguous, IMHO, all the interfaces are active => A-bit should be set And Error Code 3 returned to probing interface raises this is ambiguous. Now, I am OK that F, S and E should be cleared to avoid any confusion between the different interfaces. Did I miss something? </JMC> <snip> Best regards, JMC.
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