I wanted to configure a route to go over specific link in a case with multi-path, and found below info from Cisco Doc, and worked like a charm. At one site, we have Nexus 7k, the router map had to be build with prefix rather than access-list.
So, the example is
ip prefix-list LEAK-MAP seq 10 permit 10.1.1.0/24
route-map LEAK-10-1-1 permit 10
match ip address prefix-list LEAK-MAP
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---Cisco IP Routing Protocol Commands: -
EIGRP Support For Leaking Routes
Configuring the leak-map keyword
allows to advertise a component route that would otherwise be suppressed by the
manual summary. Any component subset of the summary can be leaked. A route map
and access list must be defined to source the leaked route.
The following is default behavior if an incomplete
configuration is entered:
•
If the
leak-map keyword is configured to reference a nonexistent
route map, the configuration of this keyword has no effect. The summary address
is advertised but all component routes are suppressed.
•
If the
leak-map keyword is configured but the access-list does
not exist or the route map does not reference the access list, the summary
address and all component routes are sent.
Examples
The following example, starting in Global configuration mode,
configures an administrative distance of 95 on interface Ethernet 0/0 for the
192.168.0.0/16 summary address:
Router(config)# router eigrp 1
Router(config-router)# exit
Router(config)# interface Ethernet 0/0
Router(config-if)# ip summary-address eigrp 1 192.168.0.0 0.0.255.255 95
The following example, starting in Global configuration mode,
configures the 10.1.1.0/24 subnet to be leaked through the 10.0.0.0 summary
address:
Router(config)# router eigrp 1
Router(config-router)# exit
Router(config)# access-list 1 permit 10.1.1.0 0.0.0.255
Router(config)# route-map LEAK-10-1-1 permit 10
Router(config-route-map)# match ip address 1
Router(config-route-map)# exit
Router(config)# interface Serial 0/0
Router(config-if)# ip summary-address eigrp 1 10.0.0.0 0.0.0.255 leak-map LEAK-10-1-1
