Lucent Technologies Cajun P550 Guide User manual

Command Line Interface Protocol
Configuration Guide
Cajun™ P550/P220 Switch Version 4.0

Lucent Technologies Command Line Interface Protocol Configuration Guide, Volume 1
© Copyright LUCENT TECHNOLOGIES 1999 ALL RIGHTS RESERVED
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.
 