В моем случае два Eternet-а,
Ethernet0 - основной
Ethernet1 - резервный
interface Ethernet0
bandwidth 10000
ip address 10.0.0.2 255.255.255.252
ip hello-interval eigrp 1 3
ip hold-time eigrp 1 7
!
interface Ethernet1
bandwidth 128
ip address 10.0.0.10 255.255.255.252
ip hello-interval eigrp 3 30
ip hold-time eigrp 3 70
!
router eigrp 1
redistribute connected
network 10.0.0.0 0.0.0.3
maximum-paths 6
distribute-list eigrp-out out
distribute-list eigrp-in in
no auto-summary
eigrp router-id 10.0.0.2
no eigrp log-neighbor-changes
!
router eigrp 3
redistribute connected
network 10.0.0.8 0.0.0.3
maximum-paths 6
distribute-list eigrp-out out
distribute-list eigrp-in in
no auto-summary
eigrp router-id 10.0.0.10
no eigrp log-neighbor-changes
!
ip classless
ip route 0.0.0.0 0.0.0.0 Ethernet0
!
!
ip access-list standard eigrp-in
permit any
ip access-list standard eigrp-out
deny 10.0.0.0 0.0.255.255
permit any
!
переключение происходит через 7 секунд после пропадения основного канала