You can configure a physical interface, a
virtual interface, or a VRF as a next hop.
About this task
Table 1. Configuration considerations
| Interface type |
Description |
|
Physical interface
|
- The interface for the next hop must have at least one IP
address configured on it. The address does not need to be in
the same subnet as the destination network.
- ARP is generated for a forwarded packet destination IP
address when a physical interface is configured as the next
hop.
|
|
Virtual interface
|
The interface for the next hop must have at least one IP address
configured on it. The address does not need to be in the same
subnet as the destination network.
|
|
VRF
|
- The VRF must be an existing VRF. Any physical port
referenced in the next hop must have a valid IP address so
that the route is added to the routing table.
- Using a VRF with a physical port as next hop allows for VRF
route leaking for all incoming traffic intended for the
destination IP address.
|
Procedure
-
Access global configuration mode.
device# configure terminal
-
To configure a physical interface, enter the destination IP address and prefix
length, the ethernet keyword, and the interface number of the
next hop.
device(config)# ip route 10.128.2.69/24 ethernet 1/4
-
To configure a virtual
interface, enter the destination IP address and prefix length, the ve keyword, and the
VLAN ID.
device(config)# ip route 10.128.2.0/24 ve 3
-
To configure a VRF, enter the
destination IP address and prefix length, the next-hop-vrf
keyword, the VRF name, and then identify the next hop as an IP address,
interface, or null route.
device(config)# ip route 10.0.0.0/24 next-hop-vrf red ethernet 1/1
This example routes traffic
for IP address 10.0.0.0/24 through VRF red over port 1/1.
Example
This example configures an IP static
route to destination network addresses beginning with 10.0.0.0 through the next-hop
interface 2/1.
device(config)# ip route 10.0.0.0/24 ethernet 2/1
Example
This example configures an IP static
route with a destination address of 10.128.2.0, a prefix-length of /24, and a
virtual interface (ve 3) as the next hop.
device(config)# ip route 10.128.2.0/24 ve 3
Example
This example routes traffic for IP address 10.0.0.0/24 through VRF red over IP
address 11.1.2.3.
device(config)# ip route 10.0.0.0/24 next-hop-vrf red 11.1.2.3
Example
This example routes traffic for IP address 10.0.0.0/24 through VRF red over virtual
interface
3.
device(config)# ip route 10.0.0.0/24 next-hop-vrf red ve 3
Example
This example discards the traffic for IP address 10.0.0.0/24 through VRF red using a
null route.
device(config)# ip route 10.0.0.0/24 next-hop-vrf red null 0
