OSPF over Frame Relay ( Point to Point , Point to Multipoint NBMA)

I hope this blog will help for easy referencing in Labbing framrelay with OSPF .when i doing first time Labbing , router uses as framerelay switch hv some mismatch configuration.
I hope this information will be informatics for CCNP Route Lab.All received are copied from
CCNP Route Lab manual . Just Only copied the most important role of this lab.

Objectives

 

1. Configure OSPF over Frame Relay.
2. Use non-broadcast and point-to-multipoint OSPF network types.
3. Modify default OSPF timer

 Step 1: Configure Frame Relay and addressing on the HQ, EAST, and WEST routers.

 Step 2: Configure the Frame Relay switch

 Step 3: Configure OSPF network type NBMA.

 On EAST and WEST, change the Frame Relay interfaces to have OSPF priority 0. This priority ensures that HQ becomes the DR.(For Point to Point Type)
Configure neighbor statements on HQ pointing toward EAST and WEST.And EAST and WEST also Pointing toward to HQ .

Step 4: Change the network type to point-to-multipoint


 Step 5: Change OSPF timers.

Q : What are some disadvantages to changing the timers if they are not tuned correctly?

Ans : If timers are not tuned correctly, there are many negative side effects. Hello packets can saturate a slower link or overload a slower router. Route instability and route flapping can occur from bad timers having an adjacency come up and down. If timers are tuned to take too long, reconvergence of a network after topology changes can be slower.

Challenge: Minimal Hello Intervals

Configure the Fast Ethernet link between EAST and WEST to lower the convergence time using the ip ospf dead-interval minimal hello-multiplier multiplier command. This command sets the dead interval to 1 second. Hellos will be sent at the rate of multiplier per second. 

Use the following Tcl script to verify connectivity to all addresses in the topology.
 
HQ# tclsh
HQ(tcl)#
foreach address {
10.1.1.1
10.1.2.1
10.1.3.1
10.1.123.1
10.1.123.2
10.1.123.3
10.1.23.2
10.1.23.3
} {
ping $address }

Final Device Configuration 

 HQ#sh running-config
Building configuration...

Current configuration : 1346 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname HQ
!
boot-start-marker
boot-end-marker
!
no aaa new-model
memory-size iomem 5
ip cef
!
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
no ip domain lookup
ip domain name lab.local
!
interface Loopback1
 ip address 10.1.1.1 255.255.255.0
 ip ospf network point-to-point
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/0
 ip address 10.1.123.1 255.255.255.0
 encapsulation frame-relay IETF
 ip ospf network point-to-multipoint
 clock rate 2000000
 frame-relay map ip 10.1.123.1 102
 frame-relay map ip 10.1.123.2 102 broadcast
 frame-relay map ip 10.1.123.3 103 broadcast
 no frame-relay inverse-arp
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/1
 no ip address
 shutdown
 clock rate 2000000
!
router ospf 1
 log-adjacency-changes
 network 10.1.1.0 0.0.0.255 area 0
 network 10.1.123.0 0.0.0.255 area 0
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
control-plane
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!       
end

======================================================
EAST#sh running-config
Building configuration...

Current configuration : 1443 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname EAST
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
ip cef
!
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
no ip domain lookup
ip domain name lab.local
!
interface Loopback2
 ip address 10.1.2.1 255.255.255.0
 ip ospf network point-to-point
!
interface FastEthernet0/0
 ip address 10.1.23.2 255.255.255.0
 ip ospf dead-interval minimal hello-multiplier 5
 duplex auto
 speed auto
!
interface Serial0/0
 ip address 10.1.123.2 255.255.255.0
 encapsulation frame-relay IETF
 ip ospf network point-to-multipoint
 clock rate 64000
 frame-relay map ip 10.1.123.1 201 broadcast
 frame-relay map ip 10.1.123.2 201
 frame-relay map ip 10.1.123.3 201 broadcast
 no frame-relay inverse-arp
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/1
 no ip address
 shutdown
 clock rate 2000000
!
router ospf 1
 log-adjacency-changes
 network 10.1.2.0 0.0.0.255 area 0
 network 10.1.23.0 0.0.0.255 area 0
 network 10.1.123.0 0.0.0.255 area 0
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
control-plane
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login   
!
!
end
======================================================
WEST#sh running-config
Building configuration...

Current configuration : 1445 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname WEST
!
boot-start-marker
boot-end-marker
!
no aaa new-model
memory-size iomem 5
ip cef
!
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
no ip domain lookup
ip domain name lab.local
!
interface Loopback3
 ip address 10.1.3.1 255.255.255.0
 ip ospf network point-to-point
!
interface FastEthernet0/0
 ip address 10.1.23.3 255.255.255.0
 ip ospf dead-interval minimal hello-multiplier 5
 duplex auto
 speed auto
!
interface Serial0/0
 ip address 10.1.123.3 255.255.255.0
 encapsulation frame-relay IETF
 ip ospf network point-to-multipoint
 clock rate 2000000
 frame-relay map ip 10.1.123.1 301 broadcast
 frame-relay map ip 10.1.123.2 301 broadcast
 frame-relay map ip 10.1.123.3 301
 no frame-relay inverse-arp
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/1
 no ip address
 shutdown
 clock rate 2000000
!
router ospf 1
 log-adjacency-changes
 network 10.1.3.0 0.0.0
 network 10.1.23.0 0.0.0.255 area 0
 network 10.1.123.0 0.0.0.255 area 0
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
control-plane
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login   
!
!
end
=======================================================
FRS#sh running-config
Building configuration...

Current configuration : 1484 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname FRS
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
ip cef
!
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
no ip domain lookup
ip domain name lab.local
!
frame-relay switching
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/0
 no ip address
 encapsulation frame-relay IETF
 no ip route-cache cef
 no ip route-cache
 clock rate 64000
 frame-relay intf-type dce
 frame-relay route 102 interface Serial0/1 201
 frame-relay route 103 interface Serial0/2 301
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/1
 no ip address
 encapsulation frame-relay IETF
 clock rate 2000000
 frame-relay intf-type dce
 frame-relay route 201 interface Serial0/0 102
!
interface Serial0/2
 no ip address
 encapsulation frame-relay IETF
 no ip route-cache cef
 no ip route-cache
 clock rate 64000
 frame-relay intf-type dce
 frame-relay route 301 interface Serial0/0 103
!
interface Serial0/3
 no ip address
 shutdown
 clock rate 2000000
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
control-plane
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end 

 ========================================================