Just did this lab earlier today and wanted to post some stuff that might help people. I’ve posted earlier on how to quickly find out IP-addresses and masks with different commands. I played around a little more today and this is another one that works nicely.

RSRack1R3#sh ip int | i Internet_address|FastEth|Serial|Loop|Vlan
FastEthernet0/0 is up, line protocol is up
Internet address is 144.1.34.3/24
FastEthernet0/1 is up, line protocol is up
Internet address is 204.12.1.3/24
Serial1/0 is administratively down, line protocol is down
Serial1/1 is administratively down, line protocol is down
Serial1/2 is administratively down, line protocol is down
Serial1/3 is administratively down, line protocol is down
Loopback0 is up, line protocol is up
Internet address is 150.1.3.3/24

And then we have an OSPF command that I don’t use often enough.

RSRack1R1#sho ip ospf border-routers
OSPF Process 1 internal Routing Table
Codes: i – Intra-area route, I – Inter-area route
i 150.1.5.5 [64] via 144.1.15.5, Serial0/0.105, ASBR, Area 0, SPF 10
I 192.10.1.254 [3] via 144.1.17.7, FastEthernet0/0, ASBR, Area 0, SPF 10
i 150.1.10.10 [65] via 144.1.15.5, Serial0/0.105, ABR, Area 0, SPF 10
i 150.1.2.2 [1001] via 144.1.17.7, FastEthernet0/0, ASBR, Area 1, SPF 15
i 150.1.7.7 [1] via 144.1.17.7, FastEthernet0/0, ABR, Area 0, SPF 10
i 150.1.7.7 [1] via 144.1.17.7, FastEthernet0/0, ABR, Area 1, SPF 15
i 150.1.8.8 [2] via 144.1.17.7, FastEthernet0/0, ABR, Area 0, SPF 10
i 150.1.8.8 [2] via 144.1.17.7, FastEthernet0/0, ABR, Area 1, SPF 15
i 150.1.4.4 [128] via 144.1.15.5, Serial0/0.105, ABR/ASBR, Area 0, SPF 10

This commands shows the cost to reach the ABRs/ASBRs. This cost can be calculated manually but this way is faster for sure.

Some comments after doing Vol3 lab 7
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3 thoughts on “Some comments after doing Vol3 lab 7

  • August 25, 2011 at 11:11 am
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    Hi, I’m doing this exact lab now!!! Did you struggle with this lab? I’m doing it and will, I don’t know whether I’m going insane or not. One example is Q4.5, which states that you can’t use a virtual link, yet there solution does!!!!!

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    • August 25, 2011 at 11:23 am
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      I don’t think I had any major issues with it. Read the task again, the key is the wording. We are not allowed to create a virtual link between R1 and SW2 but it does not say that we may not use virtual links at all. We can use SW1 as an intermediary device and create the virtual-link through there. So we will have SW2-SW1 SW1-R1. Its these things that can really mess with your mind 🙂

      Reply
  • August 25, 2011 at 8:52 pm
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    I can see where your coming from. I am inclined to agree with you – as your response fits the answer in the SG!!!
    But I do think that the question is open to interpretation. And to find the correct interpretation to the question without looking at the solutions can be really tough!!!!!!

    Reply

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