Funkwerk R1202 Reference Manual page 490

21 Local Services
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tasks of a "virtual router" and the switching of services from one gateway to the other are
controlled by the BRRP redundancy procedure.
The BRRP conforms to the specifications in RFC 2338 and the relevant Internet draft (see
www.ietf.org ).
The configuration of the router redundancy procedure is carried out in the following steps:
• Configuration of the interface via which the BRRP advertisement data packets are sent.
Note
This interface is used to transmit the BRRP advertisement data packets and possibly
to transmit keepalive monitoring data packets. Another interface must be configured in
the next step to transmit the usage data.
Configuration of the advertisement interface is performed in the Local Services->BRRP-
>Virtual Router->New->BRRP Advertisement Interface menu.
Only the active router in the router group sends advertisement data packets. The IPv4
multicast address 224.0.0.18 is used as the destination address for all routers in the
group. All passive routers in the group must monitor this address so that if the advertise-
ment data packets are not received that can react according to their priority and BRRP
configuration.
• Configuration of the interface for transmitting usage data (configuration of the virtual in-
terface).
A virtual interface is activated and deactivated by assigning it to a virtual router over the
BRRP router redundancy protocol.
Configuration is performed in the Local Services->BRRP->Virtual Router->New->Eth-
ernet Interface menu.
In this step, you configure the IP address settings and assign the interface to a virtual
router. The properties of the virtual router (e.g. the priority) are also defined here.
Note
The system automatically assigns the MAC address of the virtual interface according
to the following model: 00:00:5E:00:01:<ID of the virtual router>. The ID of the virtual
router therefore determines the MAC address of the interface, which is used to trans-
mit the usage data.
The configuration of the virtual interface (MAC address, IP address) and the configura-
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