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13-6
Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 13 Unicast Reverse Path Forwarding
Configuration Examples of uRPF
Probe proxy name replies are disabled
Policy routing is disabled
Network address translation is disabled
BGP Policy Mapping is disabled
Input features: uRPF
IP verify source reachable-via ANY
5 verification drops
5 suppressed verification drops
0 verification drop-rate
Example 13-3 shows how uRPF drops can also be seen at the PXF using the show pxf cpu statistics
drop interface command.
Example 13-3 show pxf cpu statistics drop interface Command
router# sh pxf cpu statistics drop g8/1/0
FP drop statistics for GigabitEthernet8/1/0
packets bytes
vcci undefined 0 0
bad vlan id 0 0
vcci 9E6
in l2 max mtu 0 0
in l2 min mtu 0 0
encap not supported 0 0
mlfr fragament 0 0
mpls not enabled 0 0
ip version 0 0
ip header length 0 0
ip length max 0 0
ip length min 0 0
ip checksum 0 0
fib rpf fail 0 0
acl denied 0 0
ttl 0 0
unreachable 0 0
df multicast 0 0
police input drop 0 0
police output drop 0 0
out l2 max mtu 0 0
out l2 min mtu 0 0
tunnel no match 0 0
iedge input drop(s) 0 0
iedge output drop(s) 0 0
Configuration Examples of uRPF
This section provides the following configuration examples:
• Configuring Loose Mode uRPF
• Configuring Loose Mode uRPF with the allow-self-ping Option
• Configuring Loose Mode uRPF with the allow-default Option
Configuring Loose Mode uRPF
Example 13-4 shows how to enable Loose Mode uRPF on a router over the Gigabit Ethernet Interface: