qr code generator c# tutorial 26: Frame Relay in Objective-C

Printer QR-Code in Objective-C 26: Frame Relay

26: Frame Relay
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Example Configuration with Multipoint Subinterfaces
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This section offers an example of using multipoint subinterfaces on a router to set up Frame Relay connections Use the network shown in Figure 26-13 In this example, assume that LMI is being autosensed and a single multipoint subinterface is used on RouterA Here s the configuration for RouterA:
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RouterA(config)# interface serial 0 RouterA(config-if)# encaspulation frame-relay ietf RouterA(config-if)# no shutdown RouterA(config-if)# exit RouterA(config)# interface serial01 multipoint RouterA(config-subif)# ip address 19216811 2552552550 RouterA(config-subif)# frame-relay interface-dlci 101 RouterA(config-subif)# frame-relay interface-dlci 102
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Since this is a partially meshed network, and you are terminating two VCs on the same subinterface, you need to do one of the following to solve split horizon issues: disable split horizon on RouterA or configure static routes on RouterB and RouterC
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FIGURE 26-13
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Multipoint subinterface example
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Non-Broadcast Multi-Access Environments
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This example configures static routes Here s the configuration for RouterB:
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RouterB(config)# interface serial 0 RouterB(config-if)# encaspulation frame-relay ietf RouterB(config-if)# ip address 19216812 2552552550 RouterB(config-if)# no shutdown RouterB(config-if)# exit RouterB(config)# interface ethernet 0 RouterB(config-if)# ip address 1721611 2552552550 RouterB(config-if)# no shutdown RouterB(config-if)# exit RouterB(config)# ip route 1721700 25525500 19216811
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Notice in this example that you did not need to configure the DLCI number on the physical interface, since the router will learn this from the full status update via LMI Also notice the static route on RouterB, which allows it to reach RouterC s network Here s the configuration for RouterC:
RouterC(config)# interface serial 0 RouterC(config-if)# encaspulation frame-relay ietf RouterC(config-if)# ip address 19216813 2552552550 RouterC(config-if)# no shutdown RouterC(config-if)# exit RouterC(config)# interface ethernet 0 RouterC(config-if)# ip address 1721711 2552552550 RouterC(config-if)# no shutdown RouterC(config-if)# exit RouterC(config)# ip route 1721600 25525500 19216811
CertCam ON THE CD
2610The CD contains a multimedia demonstration of setting up Frame Relay connections using multipoint subinterfaces on a router
Example Configuration with Point-to-Point Subinterfaces
This section offers an example of using point-to-point subinterfaces on a router to set up Frame Relay connections Use the network shown in Figure 26-14 In this example, assume that LMI is being autosensed and two point-to-point subinterfaces are used on RouterA The configurations on RouterB and RouterC are the same as before, with the exception that the static routes are not needed, since point-to-point subinterfaces are being used on RouterA and RouterC will need a different IP address because
26: Frame Relay
FIGURE 26-14
Point-to-point subinterface example
of the two subnets (instead of one) The biggest difference is the configuration on RouterA, shown here:
RouterA(config)# interface serial 0 RouterA(config-if)# encaspulation frame-relay ietf RouterA(config-if)# no shutdown RouterA(config-if)# exit RouterA(config)# interface serial01 point-to-point RouterA(config-subif)# ip address 19216811 2552552550 RouterA(config-subif)# frame-relay interface-dlci 101 RouterA(config-subif)# exit RouterA(config)# interface serial02 point-to-point RouterA(config-subif)# frame-relay interface-dlci 201 RouterA(config-subif)# ip address 19216821 2552552550
In this example, subinterface serial01 is connected to RouterB and subinterface serial02 is connected to RouterC Also notice that there is a different subnet on each subinterface RouterB s configuration doesn t change, but you ll need to configure 19216822 on RouterC s serial interface (RouterB and RouterC are
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now in a different subnet) One other item to point out is that if you are running a dynamic routing protocol such as RIPv2 or EIGRP, you could remove the static routes on RouterB and RouterC, since split horizon is solved by RouterA s configuration
CertCam ON THE CD
2611The CD contains a multimedia demonstration of setting up Frame Relay connections using point-to-point subinterfaces on a router
When con guring Frame Relay with subinterfaces, the Frame Relay encapsulation and LMI type go on the major (physical) interfaceThe IP address
and DLCI number for the VC go on the subinterfaceTo specify the DLCI number, use the frame-relay interface-dlci or frame-relay map command
EXERCISE 26-2 Configuring Frame Relay with Subinterfaces
ON THE CD
The preceding few sections dealt with the configuration of Frame Relay using subinterfaces This exercise will help you reinforce this material by configuring a simple Frame Relay point-to-point connection This exercise builds upon Exercise 26-1, moving the configuration from that exercise and placing it on a point-to-point subinterface Also, inverse ARP is used to perform the resolution You ll perform this lab using Boson s NetSim simulator You can find a picture of the network diagram for Boson s NetSim simulator in the Introduction of this book This exercise has you first set up two routers (2600-1 and 2600-2) and verify network connectivity Following this, you ll configure your ACL After starting up the simulator, click the LabNavigator button Next, double-click Exercise 26-2 and click the Load Lab button This will load the lab configuration based on Exercise 26-1 1 Remove the IP address on the physical interface of the 2600-1 At the top of the simulator in the menu bar, click the eRouters icon and choose 2600-1 Remove the IP address on the interface: configure terminal, interface serial1, and no ip address 192168101 2552552550 Exit Configuration mode: end
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