I have R1, R4 and R6 are in the same LAN segment and I enable IRDP on R4 and R6 and disable routing on R1 to see if it could get the IRDP advertisement.
On R4 and R6, I run debug ip icmp, I could see the IRDP adverrisement sent out and received, and on R1 I could see the IDRP advertisement, however, i could not see R1 install either R4 or R6 IRDP advertisement as a defautl route, is there any way I can check it and use the IRDP advertisemnt as the default?
Here is the output
Rack1R1#
*Mar 1 03:39:07.139: ICMP: rdp advert rcvd type 9, code 0, from 155.1.146.4
*Mar 1 03:39:07.747: ICMP: rdp advert rcvd type 9, code 0, from 155.1.146.6
Rack1R1#
Rack1R4#
*Mar 1 03:40:22.775: ICMP: src=155.1.146.4, dst=255.255.255.255, irdp advertisement sent
*Mar 1 03:40:22.779: IRDP: entries=1, size=2, lifetime=10, bytes=36
*Mar 1 03:40:22.783: IRDP: address=155.1.146.4 preference=2000
*Mar 1 03:40:23.399: ICMP: rdp advert rcvd type 9, code 0, from 155.1.146.6
Rack1R6#
*Mar 1 03:40:04.367: ICMP: rdp advert rcvd type 9, code 0, from 155.1.146.4
*Mar 1 03:40:04.923: ICMP: src=155.1.146.6, dst=255.255.255.255, irdp advertisement sent
*Mar 1 03:40:04.927: IRDP: entries=1, size=2, lifetime=12, bytes=36
*Mar 1 03:40:04.927: IRDP: address=155.1.146.6 preference=50
Rack1R6#
Other than that, I can try to use multicast as the delivery protocol on R4, I cannot see the IRDP advertisement at R1, but receive the S=0.0.0.0 d=255.255.255.255, but on R4, i do see that the IRDP advertisement is sent at the dst ip 224.0.0.1.
Rack1R4#
*Mar 1 03:42:31.775: ICMP: src=155.1.146.4, dst=224.0.0.1, irdp advertisement sent
*Mar 1 03:42:31.775: IRDP: entries=1, size=2, lifetime=10, bytes=36
*Mar 1 03:42:31.775: IRDP: address=155.1.146.4 preference=2000
*Mar 1 03:42:32.399: ICMP: rdp advert rcvd type 9, code 0, from 155.1.146.6
DEBUG at R1
Rack1R1#debu ip i
*Mar 1 03:42:46.751: ICMP: rdp advert rcvd type 9, code 0, from 155.1.146.6
Rack1R1#debu ip pac
IP packet debugging is on
Rack1R1#
*Mar 1 03:42:49.767: IP: s=155.1.146.6 (FastEthernet0/0), d=255.255.255.255, len 36, rcvd 1
*Mar 1 03:42:49.771: ICMP: rdp advert rcvd type 9, code 0, from 155.1.146.6
Rack1R1#
*Mar 1 03:42:52.335: IP: s=0.0.0.0 (FastEthernet0/0), d=255.255.255.255, len 328, rcvd 1
*Mar 1 03:42:52.763: IP: s=155.1.146.6 (FastEthernet0/0), d=255.255.255.255, len 36, rcvd 1
*Mar 1 03:42:52.763: ICMP: rdp advert rcvd type 9, code 0, from 155.1.146.6
Anyone could help?