Users Guide
initial SYN packet that requests a connection to the router for a specic service (such as SSH or BGP) with a SYN
ACK, the router waits for a period of time for the ACK packet to be sent from the requesting host that will
establish the TCP connection.
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 conguration 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-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
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 conguration after reload.
ipv4 unicast-host-route
Enable programming of IPv4 /32 route prexes in L3 host table.
Syntax
[no] ipv4 unicast-host-route
Defaults Disabled by default. By default, all the IPv4 route prexes are installed only in the LPM table.
Command Modes CONFIGURATION
IPv4 Routing 771