RE: Router Advertisement in the VRRP environment

Hi,

When one configures VRRP, the assumption is that you want
the end-hosts on the link to use the virtual address and
not the router's physical address. Router advertisements
need to be sent, but from the virtual router's point of
view.

When router advertisement is disabled on a link, then the
virtual router stops sending router advertisement on that
link.

Hope this helps.

John 

> -----Original Message-----
> From: [email protected] [mailto:[email protected]] 
> Sent: Monday, July 09, 2007 6:29 PM
> To: [email protected]
> Subject: [VRRP] Router Advertisement in the VRRP environment
> 
> Hello all,
> 
> I have the following two questions in regard to the interaction
> of 'VRRP for IPv6' and 'Router Advertisement'.
> I appreciate much if someone make these clear for me.
> 
> Q-1: May, or must not, a VRRP router keep sending Router Advertisement
>      messages whose source MAC address is physical MAC address of the
>      router's interface and whose source IPv6 address is link-local
>      addres of the router's interface even in the VRRP environment?
> 
> 
> >From draft-ietf-vrrp-ipv6-spec-08,
> >|6.4.3   Master
> (snip)
> >|   While in this state, a VRRP router MUST do the following:
> (snip)
> >|    - MUST send ND Router Advertisements for the virtual router.
> 
> Q-2: Must the master router send Router Advertisement messages
>      even when Router Advertisement isn't enabled on the link?
> 
> 
> Best regards,
> -- 
> Tomohiko Kurahashi <[email protected]>
> 
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