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[WG
Chair Hat Off] Folks, During
the IESG review of the unified VRRP draft, Dan, Operations and Management AD, questioned
the default value of the Accept_Mode in the draft. The current default
value is False and he would like us to reconsider that (his comments in the end
of this email). We
had discussions about this on the mailing list. However, I don’t remember
having a clear WG consensus for either default value. Given
the fact that the default value has absolutely no impact on the interoperability
and the fact that both the values have their pros and cons, we are proposing
that the draft should leave the default value to the implementations. The
draft would say that the implementations are free to choose any default value. Please
let us know if you agree/disagree. If we do not hear anything back, we
will assume that the WG agrees J Regards Mukesh Dan’s
Comment: ============= 3. Accept_Mode defaulting to false seems unrealistic at least in
deployments I've seen. Using accept-data config knob seems very common.
Unless enable Accept_Mode, when the virtual address moves to the Backup, the
virtual address no longer responds to ping; I've also seen an implementation to
reject pings to the virtual IP when it's in Master mode, but this seems like an
implementation bug if so (I'd like a confirmation if this is the case). In any case, this restriction makes troubleshooting and deployment
a pain; hosts and management systems often ping the gateway address to see if
the network is working, and this kills that assumption. Unless the WG has recently discussed and reached consensus that
Accept_Mode should still default to false, I'd consider revisiting this
position. |