CCIE Pursuit Blog

May 1, 2008

Question Of The Day: 01 May, 2008

Topic: IOS

r1#show ip arp
Protocol  Address          Age (min)  Hardware Addr   Type   Interface
Internet            1   0000.5e00.0101  ARPA   FastEthernet0/0

What can we tell about the IP address from this output?

Click Here For The Answer

Yesterday’s Question

Question Of The Day: 30 April, 2008 

Topic: IOS

You need to add multiple lines of configuration to the following interfaces on sw1:

Fa0/1, Fa0/2, Fa0/3, Fa0/5, Fa0/7, Fa0/8, Fa0/10, Fa0/13, Fa0/14, Fa0/15, Fa0/16, Fa0/17

Can you write a single-line interface range command to apply the changes to all of these interfaces at one time?

Answer: sw1(config)# interface range Fa0/1 – 3 , Fa0/5 , Fa0/7 – 8 , Fa0/10 , Fa0/13 – 17

interface range

This is a command that I use all of the time.  Up until I started doing CCIE labs, I did not know that you could use this command to configure discontiguous interfaces at the same time.  This is a great time saver in the lab as well in real life.

Hat tip to Steve.  I used his answer because I wasn’t able to jump on a switch from where I’m at (other than a production switch and I don’t want to run even the most innocuous commands on a production switch if I don’t have to).



  1. […] Click Here For Answer […]

    Pingback by Question Of The Day: 30 April, 2008 « CCIE Pursuit — May 1, 2008 @ 9:45 am | Reply

  2. just popped in to support those questions 🙂

    Comment by confiq — May 2, 2008 @ 11:18 am | Reply

  3. This is an VRRP Virtual IP address according to the rcpf2338 :

    7.3 Virtual Router MAC Address

    The virtual router MAC address associated with a virtual router is an
    IEEE 802 MAC Address in the following format:

    00-00-5E-00-01-{VRID} (in hex in internet standard bit-order)

    The first three octets are derived from the IANA’s OUI. The next two
    octets (00-01) indicate the address block assigned to the VRRP
    protocol. {VRID} is the VRRP Virtual Router Identifier. This
    mapping provides for up to 255 VRRP routers on a network.

    Comment by lessaid — May 2, 2008 @ 6:27 pm | Reply

  4. […] Question Of The Day: 01 May, 2008  […]

    Pingback by Question Of The Day: 02 May, 2008 « CCIE Pursuit — May 2, 2008 @ 8:04 pm | Reply

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