Lucent Technologies Cajun P550 Guide Bedienungsanleitung

Command Line Interface Protocol

Configuration Guide

Cajun™ P550/P220 Switch Version 4.0

Lucent Technologies Command Line Interface Protocol Configuration Guide, Volume 1

Produced in USA, November 1999

The products, specifications, and other technical information regarding the products contained in this

document are subject to change without notice. All information in this document is believed to be accurate

and reliable, but is presented without warranty of any kind, express or implied, and users must take full

responsibility for their application of any products specified in this document. Lucent disclaims

responsibility for errors which may appear in this document, and it reserves the right, in its sole discretion

and without notice, to make substitutions and modifications in the products and practices described in this

document.

Lucent, Cajun, CajunDocs, P550, and CajunView are trademarks of Lucent Technologies.

ALL OTHER TRADEMARKS MENTIONED IN THIS DOCUMENT ARE PROPERTY OF THEIR

RESPECTIVE OWNERS

Revisions: This is a new manual.

Version 4.0

Protocol Configuration Guide iii



    

In This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

OSPF Basic Configuration Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

Restrictions using Stub and Not-So-Stubby Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Configuring OSPF using the CLI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Configuring a Basic OSPF Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Optional OSPF Configuration Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8

OSPF Configuration Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9

Basic OSPF Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10

Router Summarization Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10

Virtual Link Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11

Stub Area Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12

Not-So-Stubby Area (NSSA) Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12

Verifying OSPF Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13

    

In This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

RIP Configuration Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

Configuring RIP using the CLI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Creating a Basic RIP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Optional RIP Configuration Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

RIP Configuration Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6

Displaying RIP Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6



Command Line Interface Protocol Configuration Guide 1-1





This chapter describes how to configure the Open Shortest Path First (OSPF) protocol

using the CLI and GUI.

  



OSPF Basic Configuration Diagram



Configuring OSPF using the CLI



OSPF Configuration Examples

Configuring OSPF

1-2 Command Line Interface Protocol Configuration Guide

   

ospf1.vsd

Define the OSPF area(s).

Command:area

area-id

Mode: Router:OSPF

Modify the OSPF area parameters

Command:area

area-id

command with various parameters.

The "Optional OSPF Configuration Tasks" section

provides details.

Mode: Router:OSPF

Modify the OSPF parameters on the interface.

Command:various commands. The "Configuring a Basic OSPF

Configuration" section provides details.

Mode: Interface Configuration

Save the configuration.

Command:copy running-config startup-config

Mode: any mode (excluding User)

Enable OSPF and enter Router:OSPF mode.

Command:router ospf

Mode: Global Configuration

Specify the interface(s) on which OSPF runs and the area ID for

each interface.

Command:network

ip-address

wildcard-mask

area

area-id

Mode: Router:OSPF

If an OSPF area does not have a physical connection to the

backbone, establish a virtual link at both endpoints.

Command:area

area-id

virtual-link

Mode: Router:OSPF

Set the OSPF router ID. For this to take effect, OSPF must be

disabled.

Command:no router ospf

ip ospf router-id

router-id

Mode: Global Configuration

Configuring OSPF

Command Line Interface Protocol Configuration Guide 1-3

     

Because stub and not-so-stubby areas do not carry external routes, an area can be

defined as a stub or not-so-stubby area only when:

❒All OSPF routers inside the stub area are configured as stub routers. These routers

become neighbors.

❒The area is not needed as a transit link for virtual links.

❒No Autonomous System Boundary Router (ASBR) is internal to the stub area.

❒The area is not the backbone area (area 0.0.0.0).

❒There is a single exit point from the area or if there are multiple exits (Area Border

Routers), routing outside the area does not have to take an optimal path.

    

This section describes how to configure and verify OSPF using the CLI. It also includes

configuration examples.

    

To create a basic OSPF configuration:

1. Go to Global Configuration mode.

2. Set the OSPF router ID. For this to take effect, OSPF must be disabled.

3. Enable OSPF and enter Router: OSPF mode.

Cajun (configure)# router ospf

Cajun (configure router:ospf)#

 

no router ospf Disable OSPF.

ip ospf router-id router-id

no ospf router-id router-id - the IP address of the router.

The no form of the command reverts to the

system default which is the lowest IP address

configured on the system.

Cajun (configure)# no router ospf

Cajun (configure)# ip ospf router-id 122.23.4.5

Configuring OSPF

1-4 Command Line Interface Protocol Configuration Guide

4. Define the OSPF area(s).

5. Specify the interface(s) on which OSPF runs and the area ID for each interface.

6. If an OSPF area does not have a physical connection to the backbone, read this

step. Otherwise, go to the next step.

When an OSPF area is not physically connected to the backbone, establish a virtual

link at both endpoints. This is done using the area area-id virtual-link command

described on the next page.

Note: If you are planning to configure an OSPF area as a stub area, virtual

links cannot be established through stub areas.

 

area area-id area-id - a number in four-part, dotted-decimal

notation that identifies the area. For example,

0.0.0.1 indicates area 1. When using OSPF in a

single area, use 0.0.0.0.

Cajun (configure router:ospf)# area 0.0.0.1

 

network ip-address

wildcard-mask area area-id ip-address - the IP address of the interface.

wildcard-mask - an inverse mark that determines

how to read ip-address. The mask has wildcard bits

where 0 is a match and 1 is "don’t care".

area-id - the area identifier.

Cajun (configure router:ospf)# network 12.21.2.3 0.0.0.0 area 0.0.0.1

Configuring OSPF

Command Line Interface Protocol Configuration Guide 1-5

Table 1-1. Area Virtual Link Command

7. Exit to Global Configuration mode and specify the interface on which OSPF is

running. This enters Interface Configuration mode. For example:

Cajun (configure router:ospf)# exit

Cajun (configure)# interface serial0

Cajun (configure-if:serial0)

area area-id virtual-link router-id [authentication-key key][dead-interval seconds]

[hello-interval seconds] [message-digest-key key-id md5 key] [retransmit-interval

seconds] [transit-delay seconds]

area

area-id - area ID assigned to the transit area for the virtual link (decimal or

dotted-decimal format).

virtual-link

router-id - the router ID of the virtual link neighbor. To obtain a neighbor’s router ID,

Telnet to the router and enter the show ip ospf command.

authentication-key

key - password for the neighboring OSPF routers on a network segment using OSPF’s

simple password authentication. Up to 8 bytes of any continuous string of characters is

allowed. All neighboring routers on the same network must have the same password

to route OSPF traffic.

dead-interval

seconds - the number of seconds hello packets must not have been seen before its

neighbors declare the router down. The default is four times the hello-interval value.

The range is 1to 65535. This value must be the same for all nodes on the specific

network.

hello-interval

seconds - number of seconds between the hello packets on the virtual link. The default

is 10 seconds and the range is 1to 65535. This value must be the same for all routers

and access servers attached to a common network.

message-digest-key

key-id - a number the routers use for MD5 authentication. The range is 1to 255.

md5 key - password the routers use for MD5 authentication. Up to 16 alphanumeric

characters are allowed. All neighboring routers on the same network must have the

same key-id and md5 key to route OSPF traffic.

retransmit-interval

seconds - number of seconds between link state advertisement retransmissions for

adjacencies belonging to an interface. The default is 5seconds. The range is 1 to 3600

seconds.

transit-delay

seconds - estimated time to transmit a link state update packet on the virtual link. The

default is 1second and the range is 1to 3600 seconds.

Configuring OSPF

1-6 Command Line Interface Protocol Configuration Guide

8. Define or modify the OSPF interface parameters.

 

ip ospf authentication-key

password The password neighboring OSPF routers on a

network segment use for OSPF’s simple password

authentication. Up to 8 bytes of any continuous

string of characters is allowed. All neighboring

routers on the same network must have the same

password to route OSPF traffic.

ip ospf cost cost The cost to send a packet on an OSPF interface.

This is an unsigned integer expressed as the link

state metric. The range is 1to 65535.

Example OSPF interface costs are:

• T1 (1.544-Mbps serial) - 128

• Ethernet - 10

All routers on the same link must have the same

cost.

ip ospf dead-interval

seconds Number of seconds hello packets must not have

been seen before its neighbors declare the router

down. This value must be the same on

neighboring routers.

The default is four times the hello interval.

ip ospf hello-interval seconds Number of seconds between the hello packets

sent to the OSPF interface. This value must be the

same on neighboring routers. The default is 10

seconds.

ip ospf message-digest-key

keyid md5 key Enable OSPF MD5 authentication on an OSPF

interface. By default, this is disabled.

keyid - identifier in the range 1to 255.

key - alphanumeric password of up to 16 bytes.

ip ospf poll-interval seconds The time interval between hellos sent to an

inactive interface. The default is 120 seconds. The

range is 0to 3600 seconds.

ip ospf priority priority An 8-bit unsigned integer that represents the

router priority level. The range is 0to 255. The

default is 1.

A value of 0 indicates an interface cannot be

elected as a designated router (DR) or backup

designated router (BDR).

ip ospf retransmit-interval

seconds Number of seconds between link state

advertisement retransmissions for adjacencies

belonging to the interface. The default is 5

seconds.

This value must be greater than the expected

round-trip delay between two devices on the

attached network. The range is 1to 65535

seconds.

Configuring OSPF

Command Line Interface Protocol Configuration Guide 1-7

9. Enter copy running-config startup-config to save the configuration.

10. Configure the optional OSPF parameters as described in the next section.

ip ospf network

{broadcast| non-broadcast|

point-to-multipoint

[non-broadcast]}

Configure broadcast networks as nonbroadcast,

multiaccess networks when, for example, there

are routers in the network that do not support

multicast addressing.

broadcast - sets the network type for the

interface to broadcast. Ethernet is a broadcast

network.

non-broadcast - sets the network type for the

interface to nonbroadcast, multiaccess (Frame

Relay, X.25).

point-to-multipoint [non-broadcast] - sets

the network type to point-to-multipoint (HDLC,

PPP).

non-broadcast - sets the point-to-multipoint

network to nonbroadcast. When you include this

keyword, configure the OSPF routers

interconnecting to the nonbroadcast network

using the neighbor command.

ip ospf transmit delay seconds Estimated time to transmit a link state update

packet on the interface. The default is 1second.

The range is 1to 65535 seconds.

neighbor ip-address [priority

number] [poll-interval

seconds]

For point-to-multipoint non-broadcast networks

only, the OSPF routers interconnecting to a

nonbroadcast network.

ip-address - interface IP address of the neighbor.

number - an 8-bit number indicating the router

priority value of the nonbroadcast neighbor

associated with the specified IP address. The

default is 0.

seconds - an unsigned integer value representing

the poll interval. This value should be larger than

the hello interval. The default is 120 seconds.





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