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Scenario 9-3 675
16
IGRP uses split horizon on point-to-point subinterfaces only. If multipoint subinterfaces
are used, or if no subinterfaces are used, split horizon is off by default.
17
LMI keepalive messages, which flow between the router and the switch, are no longer
sent. No keepalive messages pass from router to router.
18
The frame-relay interface-dlci command could be changed on Router1 and Router3 to
include the keyword ietf at the end of the command--for example, frame-relay
interface-dlci 501 ietf
on R3.
19
The show frame-relay lmi command (refer to Example 9-14) lists this information.
20
NT1, NT2, TE1, TE2, and TA are all function groups.
21
D channels are used for signaling.
Scenario 9-3
Part A of the final review scenario begins with some planning guidelines that include planning
IP addresses, IPX network numbers, the location of SAP filters, and the location of IP standard
access lists. After you complete Part A, Part B of Scenario 9-3 asks you to configure the three
routers to implement the planned design and a few other features. Finally, in Part C of Scenario
9-3, some errors have been introduced into the network, and you are asked to examine router
command output to find the errors. Part C of Scenario 9-3 also lists some questions relating to
the user interface and protocol specifications.
Scenario 9-3, Part A--Planning
Your job is to deploy a new network with three sites, as shown in Figure 9-5. The decision to
use Frame Relay, as well as the product choices, has already been made. To complete Scenario
9-3, Part A, perform the following tasks:
1
Plan the IP addressing and subnets used in this network. Class B network 170.1.0.0 has
been assigned by the NIC. The maximum number of hosts per subnet is 300. Assign IP
addresses to the PCs as well. Use Table 9-10 and Table 9-11 to record your answers.
2
Plan the IPX network numbers to be used. You can choose the internal network numbers
of the servers as well. Each LAN should support both SAP and SNAP encapsulations.
3
Plan the location and logic of IP access lists to filter for the following criteria:
-- Access to servers in PC11 and PC12 is allowed for Web and FTP clients from
anywhere else.
-- All other traffic to or from PC11 and PC12 is not allowed.
-- No IP traffic between the Ethernets off R2 and R3 is allowed.
-- All other IP traffic between any sites is allowed.
ch09.fm Page 675 Monday, March 20, 2000 5:23 PM