| Author |
who has taken CCNA..
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| worrywarm 2004-02-28, 3:09 pm |
| If in the test, I'm required to configure OSPF for the following interfaces,
E0: 192.168.33.1/24
S0: 192.168.100.50/30
version 1,
router(config)#router ospf 2
router(config)#network 192.168.33.0 0.0.0.255 area 0
router(config)#network 192.168.100.48 0.0.0.3 area 0
version 2,
router(config)#router ospf 2
router(config)#network 192.168.33.1 0.0.0.0 area 0
router(config)#network 192.168.100.50 0.0.0.0 area 0
version 3 (if only these two int are used on the router)
router(config)#router ospf 2
router(config)#network 0.0.0.0 255.255.255.255 area 0
Can I use any version of them? Or I have to use version 1/2 ?
Kind of scared of what it's going to be in the test...
THANKS!! | |
| Kitsune 2004-02-28, 8:06 pm |
| I would be specific to be safe, such as version 1 or 2. Theoretically, since the testing eninge is automated, it is looking for specific numbers and strings. Maybe version 3 would work on the exam, but is it worth the risk? 
With the amount of questions you ask here, I am sure you have prepared a lot! Think you'll do fine on that test.  | |
| steeda 2004-02-28, 8:15 pm |
| Number 1 is wrong ( typo? ) It should read:
router(config)#router ospf 2
router(config)#network 192.168.33.0 0.0.0.255 area 0
router(config)#network 192.168.100.48 0.0.0.3 area 0 | |
| worrywarm 2004-02-28, 8:26 pm |
| quote:
Originally posted by steeda
Number 1 is wrong ( typo? ) It should read:
router(config)#router ospf 2
router(config)#network 192.168.33.0 0.0.0.255 area 0
router(config)#network 192.168.100.50 0.0.0.3 area 0
It is typo, it should be
router(config)#network 192.168.100.48 0.0.0.3 area 0
same with
router(config)#network 192.168.100.50 0.0.0.3 area 0 | |
| worrywarm 2004-02-28, 8:27 pm |
| quote:
Originally posted by Kitsune
With the amount of questions you ask here, I am sure you have prepared a lot! Think you'll do fine on that test.
lol..hope so 
thank you! | |
| steeda 2004-02-28, 8:35 pm |
| quote:
Originally posted by worrywarm
It is typo, it should be
router(config)#network 192.168.100.48 0.0.0.3 area 0
same with
router(config)#network 192.168.100.50 0.0.0.3 area 0
I didn't even bother to read the subnet. .50 as the network address would be invalid for a /30 network. .48 is what you want. | |
| worrywarm 2004-02-28, 10:04 pm |
| yeah, you are right. I realize it when I wrote both of them down
Thanks! | |
| Joe Dali 2004-02-29, 12:02 am |
| I dunno where u got this (CR?), but this is pretty much the exact sim situation on the test. | |
| Joe Dali 2004-02-29, 12:13 am |
| So, is part of the OSPF lab troubleshooting to distinguish that the .50 is wrong?
This may be where I need help ... HELP.
:]
Someone clear it up for us newbies? | |
| worrywarm 2004-02-29, 12:37 am |
| Router(config)# router ospf process_ID
Router(config-router)# network IP_address wildcard_mask area area_#
It does not require a network address!?
I think 50 also works.
anyone can confirm?
(part of the question from a review question of my book, part of it I made up ) | |
| Joe Dali 2004-02-29, 12:48 am |
| One of my study sources says:
E0: 192.168.33.1/24
S0: 192.168.100.50/30
network 192.168.33.0 0.0.0.255 area 0
network 192.168.100.4 0.0.0.3 area 0
Can someone confirm why this is the correct or wrong answer? | |
| steeda 2004-02-29, 12:57 am |
| 192.168.100.4 /30 has absolutely nothing to do with the network 192.168.100.50 /30 is in. Useable host IP's in 192.168.100.4 /30 are 192.168.100.5 and 6. Maybe the 50 is supposed to be a 5. | |
| Joe Dali 2004-02-29, 12:59 am |
| Thanks ... it must be a EuroStudyGuideTypo (tm). | |
| steeda 2004-02-29, 1:01 am |
| quote:
Originally posted by worrywarm
Router(config)# router ospf process_ID
Router(config-router)# network IP_address wildcard_mask area area_#
It does not require a network address!?
I think 50 also works.
anyone can confirm?
(part of the question from a review question of my book, part of it I made up )
50 works for what? .50 is the IP stated for S0. If you wanted to advertise the network 192.168.100.50 /30 is a part of the correct statement is network 192.168.100.50 0.0.0.3 area 0 . The imaginary router on the other end of that serial link would have to be assigned IP 192.168.100.49 . | |
| worrywarm 2004-02-29, 11:02 am |
| quote:
Originally posted by steeda
50 works for what? .50 is the IP stated for S0. If you wanted to advertise the network 192.168.100.50 /30 is a part of the correct statement is network 192.168.100.50 0.0.0.3 area 0 .
You answered my question!
for a interface with the ip 192.168.100.50 /30, we can use either network 192.168.100.50 0.0.0.3 area 0 or network 192.168.100.48 0.0.0.3 area 0
for the configuration of OSPF
THank you very much! | |
| steeda 2004-02-29, 3:08 pm |
| No, you can't use network 192.168.100.50 0.0.0.3 area 0 because 192.168.100.50 is not the network ID of any network with a 30 bit mask. | |
| worrywarm 2004-02-29, 4:14 pm |
| Router(config)# router ospf process_ID
Router(config-router)# network IP_address wildcard_mask area area_#
I thought IP_address here does not have to be the network address, and what we need is a valid network address after the effect of wildcard mask?!
192.168.100.48 0.0.0.3 ->192.168.100.48
192.168.100.49 0.0.0.3 ->192.168.100.48
192.168.100.50 0.0.0.3 ->192.168.100.48
192.168.100.51 0.0.0.3 ->192.168.100.48
I think this way because we can use network
192.168.100.50 0.0.0.0 to include only the interface with this IP address 192.168.100.50.
Am I wrong???
thanks! | |
| Wilieco 2004-02-29, 5:02 pm |
| you are close
.48 is the network address
.49 is a useable address
.50 is a useable address
.51 is the broadcast address
the 0.0.0.3 replaces 255.255.255.252 if you were using another protocol like rip v2 |
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