Users Guide

ip unknown-unicast
Enable IPv4 catch-all route.
Syntax
ip unknown-unicast [vrf vrf-name]
To remove the IPv4 catch-all route (0.0.0.0/0) from the LPM route forwarding table in hardware which
gets added as a default configuration after the initialization of FIB Agent module, use the no ip
unknown-unicast command.
Defaults None
Parameters
vrf vrf-name (Optional) Enter the keyword vrf followed by the name of the VRF to enable
catch-all routes corresponding to that VRF.
Command Modes CONFIGURATION
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
Networking OS Command Line Reference Guide.
Version Description
9.10(0.0) Introduced on the S6100–ON.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.4(0.0) Introduced on the S–Series.
Usage
Information
Use this command to add the IPv4 catch-all route (0.0.0.0/0) in the LPM route forwarding table if it was
deleted using the no ip unknown-unicast command previously. This will be the default configuration
after reload.
ipv4 unicast-host-route
Enable programming of IPv4 /32 route prefixes in L3 host table.
Syntax
[no] ipv4 unicast-host-route
Defaults Disabled by default. By default, all the IPv4 route prefixes are installed only in the LPM table.
Command Modes CONFIGURATION
Command
History
Version Description
9.10(0.0) Introduced on the S6100–ON.
9.8(1.0) Introduced on the Z9100–ON.
9.7(0.0) Introduced on the S6000-ON.
9.3(0.1) Introduced on the S6000.
9.2(1.0) Introduced on the Z9500.
Usage
Information
A warning message is displayed when you enter this command stating that this setting takes effect for
existing routes only when IPv4 route prefixes are cleared from the routing table (RTM). To disable this
functionality, use no ipv4 unicast-host-route command.
644 IPv4 Routing