VRRP (IP packets addressed to the IP address of the virtua..

Archived from groups: comp.dcom.lans.ethernet (More info?)

In article <44b975c6.0501180012.457e12e@posting.google.com>,
ghiggia <ghiggia@spymac.com> wrote:
:RFC 3768 section 6.4.3 states:

:"MUST accept packets addressed to the IP address(es) associated with the virtual
:router if it is the IP address owner."

:Which MAC address must be used to reply these packets? The real MAC address of
:the interface or the virtual one?

Section 8.2

When a host sends an ARP request for one of the virtual router IP
addresses, the Master virtual router MUST respond to the ARP request
with the virtual MAC address for the virtual router. The Master
virtual router MUST NOT respond with its physical MAC address. This
allows the client to always use the same MAC address regardless of
the current Master router.

Section 8.3

If Proxy ARP is to be used on a VRRP router, then the VRRP router
must advertise the Virtual Router MAC address in the Proxy ARP
message. Doing otherwise could cause hosts to learn the real MAC
address of the VRRP router.
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