I am hoping someone can help me. I ran into a strange problem. Pods on one of my nodes cannot ping other pods on other nodes. I finally found that the routes created by calico are to a 10.1.30.0/24 network, when flannel wants a 10.1.80.0/24. I have attached my ip routes and ifconfig for flannel interface on the node:
flannel.1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450
inet 10.1.80.0 netmask 255.255.255.255 broadcast 0.0.0.0
inet6 fe80::4cf3:b6ff:fe4e:cf39 prefixlen 64 scopeid 0x20
ether 4e:f3:b6:4e:cf:39 txqueuelen 0 (Ethernet)
RX packets 113871 bytes 65032558 (65.0 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1482730 bytes 239397233 (239.3 MB)
TX errors 0 dropped 861 overruns 0 carrier 0 collisions
ip routes
default via 10.105.0.1 dev eno1np0 proto static
10.1.0.0/16 via 10.105.0.5 dev eno1np0 proto static
10.1.44.0/24 via 10.1.44.0 dev flannel.1 onlink
10.1.61.28 dev calie936ad1ee52 scope link
10.1.61.29 dev calidb66428ac50 scope link
10.1.61.31 dev cali41a3cc79a18 scope link
10.1.61.35 dev calibf2394cba78 scope link
10.1.61.38 dev calif5c5a3f7008 scope link
10.1.61.40 dev cali105c478febf scope link
10.1.61.41 dev calid2359520ad1 scope link
10.1.61.50 dev cali09c38faa693 scope link
10.1.61.52 dev cali3576aca0574 scope link
10.1.61.53 dev caliceb889e05ae scope link
10.1.61.67 dev cali2f459349bed scope link
10.1.61.68 dev calic6407508676 scope link
10.1.61.69 dev cali4ea6a6b97e3 scope link
10.1.61.89 dev cali979b2c63e17 scope link
10.1.61.90 dev califfc2e29f687 scope link
10.1.61.91 dev cali5c652174c87 scope link
10.1.61.92 dev cali738dc0dff46 scope link
10.1.61.93 dev cali324abe76c39 scope link
10.1.61.94 dev cali6c22ffc0cb7 scope link
10.1.61.95 dev cali149bfc8ff42 scope link
10.1.61.96 dev calidc91e80c49d scope link
10.1.61.97 dev cali3c22d5c4efd scope link
10.1.61.98 dev calic39ec9bf277 scope link
10.1.61.99 dev cali68c92ef2707 scope link
10.1.61.100 dev calic06f401838b scope link
10.1.61.101 dev cali2aeb22c9674 scope link
10.1.61.102 dev calic3947a69311 scope link
10.1.61.103 dev califae60be98e2 scope link
10.1.61.104 dev calie20e5740bd1 scope link
10.1.61.105 dev cali67173c38afd scope link
10.1.61.108 dev calia1f125bcd1d scope link
10.1.61.110 dev calib3c61c3cba9 scope link
10.1.61.111 dev cali9457edc7cdc scope link
10.1.61.112 dev cali545bf6e21e8 scope link
10.1.61.202 dev cali02ff9710db1 scope link
10.1.61.203 dev califc8e4749dd1 scope link
10.1.71.0/24 via 10.1.71.0 dev flannel.1 onlink
10.1.80.0/24 via 10.1.80.0 dev flannel.1 onlink
10.1.86.0/24 via 10.1.86.0 dev flannel.1 onlink
10.3.5.0/24 dev eno2np1 proto kernel scope link src 10.3.5.4
10.105.0.0/16 dev eno1np0 proto kernel scope link src 10.105.0.21