Cisco Nexus 3548 User Manual

181
Cisco Nexus 3548 Switch NX-OS Unicast Routing Command Reference
OL-27852-01
Chapter Unicast Routing Commands
ip ospf dead-interval
ip ospf dead-interval
To set the interval during which at least one hello packet must be received from a neighbor before the
router declares that neighbor as down, use the ip ospf dead-interval command. To restore the default,
use the no form of this command.
ip ospf dead-interval seconds
no ip ospf dead-interval
Syntax Description
Command Default The default for seconds is four times the interval set by the ip ospf hello-interval command.
Command Modes Interface configuration mode
Command History
Usage Guidelines The dead interval value must be the same for all networking devices on a specific network.
Configure a shorter dead interval to detect down neighbors faster and improve convergence. Very short
dead intervals could cause routing instability.
Use the show ip ospf interface command to verify the dead interval and hello interval.
This command requires the LAN Base Services license.
Examples This example shows how to set the OSPF dead interval to 20 seconds:
switch# configure terminal
switch(config)# interface ethernet 1/2
switch(config-if)# no switchport
switch(config-if)# ip ospf dead-interval 20
switch(config-if)#
Related Commands
seconds Interval (in seconds) during which the router must receive at least one hello
packet from a neighbor or that neighbor adjacency is removed from the local
router and does not participate in routing. The range is from 1 to 65535, and
the default is 40. The value must be the same for all nodes on the network.
Release Modification
5.0(3)A1(1) This command was introduced.
Command Description
ip ospf hello-interval Specifies the interval between hello packets that OSPF sends on the
interface.
show ip ospf interface Displays OSPF interface-related information.

Cisco Nexus 3548 Specifications

General

Rack Units	1RU
Product Type	Switch
Form Factor	Rack-mountable
Jumbo Frame Support	9216 bytes
Input Voltage	100-240 VAC
Product Series	Nexus 3000
Model	Nexus 3548
Operating System	Cisco NX-OS
Ports	48 x 10GE SFP+
Latency	190 ns
Airflow	Front-to-back

Summary

New and Changed Information

Preface

Describes audience, organization, and conventions of the document.

Document Conventions

Explains conventions used in command descriptions and screen examples.

Related Documentation

Lists other Cisco documentation for related products.

Unicast Routing Commands

additional-paths receive

Enables BGP additional paths for a prefix to be received from a capable peer.

address-family (BGP neighbor)

Enters neighbor address family mode for configuring BGP routing protocols.

area authentication (OSPF)

Enables authentication for an Open Shortest Path First (OSPF) area.

aggregate-address (BGP)

Creates a summary address in a Border Gateway Protocol (BGP) routing table.

authentication (HSRP)

Configures authentication for the Hot Standby Router Protocol (HSRP).

distance (EIGRP)

Sets administrative distances for EIGRP internal and external routes.

redistribute (BGP)

Injects routes from one routing domain into the Border Gateway Protocol (BGP).

router bgp

Assigns an autonomous system (AS) number and enters BGP configuration mode.

neighbor

Configures a Border Gateway Protocol (BGP) neighbor and enters configuration mode.

Unicast Routing Show Commands

show bgp

Displays Border Gateway Protocol (BGP) routes.

show ip eigrp neighbors

Displays information about neighbors discovered by EIGRP.

show ip ospf neighbors

Displays Open Shortest Path First (OSPF)-neighbor information on a per-interface basis.

show ip route

Displays routes from the unicast Routing Information Base (RIB).

show running-config

Displays the running configuration.

show vrrp

Shows information about the Virtual Router Redundancy Protocol (VRRP).