[j-nsp] VRRP

[Ian MacKinnon]

On 1/23/06, Chris Kawchuk <chrisk at distributel.ca> wrote:
> Hi Ian,
>
> FWIW, we have multiple M-series routers (M7i's), VLAN trunked to Gigabit
> switches (Alcatel); and are running VRRP on multiple VLANs off the same
> 1 Gbit interface on the M-series with no issues to report. (i.e. works
> great, less filling)
>
> The only "gotcha" is to ensure that you reserve 3 addresses for your
> VRRP Implementation per VLAN. (One as the "virtual" IP, and two for the
> "physical" routers). The M-series *do* support the VRRP configuration
> where you only use 2 addresses, but it requires change of the base MAC
> address of your physical interface to co-incide with the RFC-compliant
> VRRP MAC Address - hence you can only do this once per physical
> interface. This then eliminates the possibility of running more than one
> "2-address VRRP instance" on any particular VLAN-tagged interface.
>
> Other than that - it works like a charm.
>

Thanks Chris, useful info