Scenario 91 Answers

1 To activate HSRP on an interface, you must use the standby command as follows:

interface Vlan10

ip address 192.168.1.1 255.255.255.0

no ip redirects standby 99 ip 192.168.1.2

2 Configuring Router B to be the active router involves the use of the priority command as shown in the following sample configuration:

interface Vlan10 ip address 192.168.1.3 255.255.255.0 no ip redirects standby 99 ip 192.168.1.2 standby 99 priority 150

3 Building on the configuration as we go forward, we add the preempt command to allow Router B to recover as the active router:

interface Vlan10

ip address 192.168.1.3 255.255.255.0

no ip redirects standby 99 ip 192.168.1.2

standby 99 priority 150

standby 99 preempt

4 Continue to build on the configuration here by adding the timers command. Use the standard practice of having holdtime at least three times the hellotime.

interface Vlan10

ip address 192.168.1.3 255.255.255.0

no ip redirects standby 99 ip 192.168.1.2

standby 99 priority 150

standby 99 preempt standby 99 timers 10 30

This chapter covers the following topics that you will need to master for the CCNP Switching Exam:

• Multicast Overview—This section outlines an overview of transmission methods and the characteristics of multicasts.

• Multicast Addressing—This section deals with how IP multicast addresses get reconciled to Ethernet MAC addresses.

• Managing Multicast Traffic —This section discusses multicast groups as well as IGMP v1 and v2.

• Routing Multicast Traffic—This section discusses how multicast traffic is routed and the formation of trees on the router to support multicasts.

• Multicast Routing Protocols—This section discusses various routing protocols for multicasts and their particular appropriateness.

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