Frame Relay cloud; OSPF and Tunneling Scenerio

6/30/2013

 
In this scenario; We are trying to built a topology in which four customers wanna communicate each other via frame relay cloud. Normally labs are done with one FR device but what about when we are working as a WAN service provider having so many devices in their cloud. Let's see how customers of TelcoRemote2 will communicate to customer of TelcoKHI.

We will built a tunnel for this purpose and use OSPF as a routing protocol between Cloud. Let's see detail
Picture
Requirement:

  • Configure all IP addresses as per topology
  • Assign DLCI's to all customers
  • Assign Route to all customers so that they will communicate each other seamlessly
  • Configure OSPF area 0 for network 10.1.1.0 and 20.1.1.0
  • Configure tunnel so that Remote customer can communicate to Site1, 2 and 3 customers.
  • Verify connectivity with
    ping command
    show frame-relay map
    show frame-relay route
    show frame-relay pvc
    debug frame-relay packet
    debug frame-relay pvc
    debug frame-relay event
!CustomerSite1 Configuration

interface Serial0/0
ip address 1.1.1.1 255.255.255.0
encapsulation frame-relay



frame-relay interface-dlci 101
frame-relay interface-dlci 102
frame-relay interface-dlci 103
frame-relay interface-dlci 104
no shut

!CustomerSite2 Configuration

interface Serial0/0
ip address 2.2.2.2 255.255.255.0
encapsulation frame-relay
frame-relay interface-dlci 201
frame-relay interface-dlci 202
frame-relay interface-dlci 203
frame-relay interface-dlci 204
no shut

! CustomerSite3 Configuration

interface Serial0/0
ip address 3.3.3.3 255.255.255.0
encapsulation frame-relay
frame-relay interface-dlci 301
frame-relay interface-dlci 302
frame-relay interface-dlci 303
frame-relay interface-dlci 304
no shut

! Telco remote2 Configuration

frame-relay switching




interface Serial0/0
no ip address

encapsulation frame-relay
clock rate 64000
frame-relay intf-type dce

frame-relay route 102 interface Serial0/1 201
frame-relay route 103 interface Serial0/2 301
frame-relay route 104 interface Tunnel0 401
no shut

interface Serial0/1
no ip address
encapsulation frame-relay
clock rate 64000
frame-relay intf-type dce
frame-relay route 201 interface Serial0/0 102
frame-relay route 203 interface Serial0/2 302
frame-relay route 204 interface Tunnel0 402
no shut

interface Serial0/2
no ip address
encapsulation frame-relay
clock rate 64000
frame-relay intf-type dce
frame-relay route 301 interface Serial0/0 103
frame-relay route 302 interface Serial0/1 203
frame-relay route 304 interface Tunnel0 403
no shut

interface fastethernet 0/0
ip address 10.1.1.1 255.255.255.252
no shut

interface tunnel 0
no ip address
tunnel source 10.1.1.1
tunnel destination 20.1.1.1

Router OSPF 10
network 10.1.1.0 0.0.0.3 area 0

! R7 Configuration

interface fastethernet 0/0
ip address 10.1.1.2 255.255.255.252
no shut

interface fastethernet 0/1
ip address 20.1.1.2 255.255.255.252
no shut

Router OSPF 10
network 10.1.1.0 0.0.0.3 area 0
network 20.1.1.0 0.0.0.3 area 0


! Telco KHI Configuration

frame-relay switching

interface Serial0/2
no ip address
encapsulation frame-relay
clock rate 64000
frame-relay intf-type dce

! Note both dlcis are same in all routes
frame-relay route 401 interface Tunnel0 401
frame-relay route 402 interface Tunnel0 402
frame-relay route 403 interface Tunnel0 403
no shut

interface fastethernet 0/0
ip address 20.1.1.1 255.255.255.252
no shut

interface tunnel 0
no ip address
tunnel source 20.1.1.1
tunnel destination 10.1.1.1

Router OSPF 10
network 20.1.1.0 0.0.0.3 area 0


! RemoteCustomer Configuration

interface Serial0/0
ip address 15.15.15.1 255.255.255.0
encapsulation frame-relay
frame-relay interface-dlci 401
frame-relay interface-dlci 402
frame-relay interface-dlci 403
frame-relay interface-dlci 404
no shut
Configuration Explanation


Configuring IP on customer interface
encapsulation frame-relay command sets the frame encapsulation type. There are two types of Frame Relay encapsulations: Cisco and IETF. Cisco is the default.

We are putting many DLCI's to one physical serial interface.









See Site1 Explanation










See Site1 Explanation






This is a key command on FR switches on service provider side. Forget this command; Forget FR switching. Anyhow; If you try to configure interface type dce without this; you will get error.


As this interface word as a FR enabled interface; it donot require IP address.
Setting encapsulation type
Setting clock rate
FR switch interface must be DCE

This command is telling that DLCI 102, 103, 104 should route toward said interface



























Creating tunnel from source 10.1.1.1 (interface F0/0) to destination 20.1.1.1 (int F0/0)
































This is a key for tunneling Frame relay. Both DLCI's should be same in each command else you will find status Inactive