ICMP Router Discovery Protocol (IRDP) is used to make High Availability or redundancy available on routers and to make switching between them in a short time. The IRDP uses RFC 1256.
IRDP generates ICMP Router Advertisements which is an ICMP message type 9 to all host. Host that hears this will set the default gateway to that router. In case of more than 1 router, the host will choose a primary router and saves the other configuration and will use it if it loses the primary router. A host itself can send an ICMP Router Solicitation (ICMP message type 10), where it will ask the IDRP router to send Router Advertisement packets to the host.
The IDRP uses real IP address and MAC address of the L3 Switch / Router. It does not use any kind of virtual addresses.
To configure put the command "(config-if)#ip irdp" in the interface mode.
- 23 November 2010 --
IRDP generates ICMP Router Advertisements which is an ICMP message type 9 to all host. Host that hears this will set the default gateway to that router. In case of more than 1 router, the host will choose a primary router and saves the other configuration and will use it if it loses the primary router. A host itself can send an ICMP Router Solicitation (ICMP message type 10), where it will ask the IDRP router to send Router Advertisement packets to the host.
The IDRP uses real IP address and MAC address of the L3 Switch / Router. It does not use any kind of virtual addresses.
To configure put the command "(config-if)#ip irdp" in the interface mode.
- 23 November 2010 --
No comments:
Post a Comment