Administrator Guide

Layer 3 Routing Commands 1558
Only IPv4 routes are supported with the vrf parameter.
Adding a static route with a Null 0 next hop specified configures a routing
black hole (a static reject route). Packets destined to that prefix are dropped.
If an interface for the next hop is specified, it may be a numbered or
unnumbered interface.
A static route entry is only installed if the next hop IP address matches one of
the local subnets (i.e., the next hop is reachable). In case of unnumbered
interfaces, static routes entries created for an unnumbered-peer do not match
with any of the local subnets. By specifying the interface explicitly in the
static route command along with the next hop IP address, the switch can
correctly install static route entries for unnumbered-peers. It is also possible
to configure ‘unnumbered interface routes’ where the next hop IP address is
not specified and only the unnumbered nexthop interface is configured.
Examples
Route Leaking Example 1
The following shows the configuration for VRF red-1 configured in VLAN 10.
A static global route for the 172.16.0.0 with a next hop of 172.16.0.2 is
injected into VRF red-1.
configure
vlan 10
exit
ip vrf red-1
ip routing
exit
ip routing
ip route vrf red-1 172.16.0.0 255.240.0.0 172.16.0.2
interface vlan 1
ip address 172.16.0.1 255.240.0.0
exit
interface vlan 10
ip vrf forwarding red-1
ip address 192.168.0.1 255.255.255.0
ip ospf area 0
exit
router ospf vrf "red-1"
router-id 1.1.1.1
network 192.168.0.0 255.255.255.0 area 0
exit
!
2CSNXXX_SWUM204.book Page 1558 Monday, January 25, 2016 1:25 PM