From: anthony.sequeira@thomson.com
Date: Sun Jan 28 2007 - 16:37:14 ART
LAST WEEK'S ANSWER:
Answer: b, c
Topic Domain: 7g
Issues:
What are the problems in this configuration?
Solutions:
Here the loopback 1 interface of each redundant RP possesses the address
of the RP to be assigned to all multicast routers. This address - and
the addresses used for the MSDP peering needs to be a host route. Host
routes use a 32-bit mask. You should also set the Originator ID of each
MSDP device to the loopback address used for the MSDP peering. Here this
address is incorrectly assigned to the RP address. These RPs do not need
the no ip pim dm-fallback command. This command is optional, not
required.
More Information:
Anycast RP
http://www.cisco.com/univercd/cc/td/doc/cisintwk/intsolns/mcst_sol/anyca
st.htm
Configuring Sparse Mode with Anycast RP
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/hi
mc_c/chap05/mcbbasic.htm#wp1045565
LAST WEEK'S QUESTION:
7-11-1. Examine the configurations shown in Exhibit 1 for the
implementation of Anycast RP. What problems exist in this configuration?
Choose two.
a. The routers are missing the no ip pim dm-fallback commands; this
command is required
b. The routers are using 24-bit masks for the RP addresses
c. The msdp originator-id should be pointing to the interface used
in the msdp peering
d. The routers are incorrectly configured with identical addresses
on the loopback 1 interfaces
e. The MSDP peering address must be the same as the RP Anycast
address
Exhibit 1
RP1#
interface loopback 1
ip address 172.16.1.1 255.255.255.0
!
interface loopback 2
ip address 172.16.2.1 255.255.255.0
!
ip msdp peer 172.16.2.2 connect-source loopback 2
ip msdp originator-id loopback 1
RP2#
interface loopback 1
ip address 172.16.1.1 255.255.255.0
!
interface loopback 2
ip address 172.16.2.2 255.255.255.0
!
ip msdp peer 172.16.2.1 connect-source loopback 2
ip msdp originator-id loopback 1
THIS WEEK'S QUESTION:
4-11-4. Examine the topology shown in Exhibit 1 and the partial
configuration shown in Exhibit 2. What is the OSPF cost value for the
10.X.X.X route as it would appear on R1?
a. 20
b. 410
c. 390
d. 800
e. 780
Exhibit 1
R1-S1-Cost195---Area 0--Cost195-S1-R2-S0-Cost195---Area
10---Cost195-S2-R3-E0---EIGRP 100---10.10.10.X/24
Exhibit 2
!
router ospf 1
redistribute eigrp 100 subnets metric-type 1
Question of the Week Compliments of:
TESTiT
http://www.netmasterclass.com/site/written.php
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