CCIE Pursuit Blog

May 22, 2008

Question Of The Day: 22 May, 2008

Topic: Mulitcast

Which well-known multicast groups do each of the following addresses below to:

224.0.0.1
224.0.0.2 
224.0.0.5
224.0.0.6 
224.0.0.9 
224.0.0.10   
224.0.1.39 
224.0.1.40 

Click Here For The Answer


Yesterday’s Question

Question Of The Day: 20 May, 2008 

Topic: OSPF

You’ve rolled out your new OSPF auto-cost command to your network.  It looks like one of your colleagues has adjusted the OSPF cost of interface FastEthernet0/0.  That interface should have an OSPF cost of 1000.  What will it’s OSPF cost be based on the following configuration:

interface FastEthernet0/0
 description ->r2 fa0/0
 ip address 100.1.12.1 255.255.255.0
 ip ospf cost 10
 !
router ospf 100
 router-id 1.1.1.1
 auto-cost reference-bandwidth 100000
 network 100.1.12.1 0.0.0.0 area 0
 network 100.1.12.1 0.0.0.0 area 0

Answer: The OSPF cost will be 10.

The OSPF cost interface command will override the default cost of an interface.  Even though we’ve changed the way that IOS calculates the default cost (by using the auto-cost command under the OSPF process) it is still the default cost.

 

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2 Comments »

  1. […] Click Here For The Answer […]

    Pingback by Question Of The Day: 20 May, 2008 « CCIE Pursuit — May 22, 2008 @ 8:54 am | Reply

  2. At this stage of my Cisco infancy, I can answer one, maybe two if i get lucky (no wiki lookups of course!;))

    224.0.0.5 – OSPF. Hello messages are sent to this address and OSPF-speaking routers listen for it.
    224.0.0.9 – RIP?
    224.0.0.10 – EIGRP?

    All the others I’m sure I’ll learn along the way.

    Comment by Aragoen Celtdra — May 22, 2008 @ 6:00 pm | Reply


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