CCNA - Failed(809), need advice

Author

Failed(809), need advice

examfear

2003-09-17, 11:09 am

Hi:

I gave my CCNA yesturday & got a score of 809.
I did not do well on simulation,
I need to know, which simulation softwares are good?

Further i have few question.
CHAP is 1)one way 2)Two way 3)Three way 4)Four way Handshake?

If one cannot see rip in show ip route , though rip is enabled, what could be the reason?

If CHAP is enabled on an interface,

show interface command will give
1)serial up 2)serial down 3)LCP open 4)LCP closed.

Would appreciate reply.

Thanks!

Humbug

2003-09-17, 11:21 am

1. CHAP is 4-way handshake.

2. You only enabled RIP, and didn't use network command to add networks into the routing tables.

3.Serial up or down relate to layer 1 , but LCP is layer 2 protocol and it is down. Answer: Serial is up,Line Protocol is down. LCP Closed.

examfear

2003-09-17, 11:28 am

Rip is enabled & networks are also added.u can see rip in show run command , but cannot see in show ip route

Why will LCP be closed, if CHAP is enabled?

Please suggest me some SIMULATION softwares, which have TROUBLESHOOTING problems?

Thanks!

martek

2003-09-17, 11:34 am

CHAP has a three-way handshake: challenge, reply (MD5 hash value), acknowledgment of reply (MD5 hash accepted). Check your CHAP theory (PPP authentication using PAP/CHAP).

If you enabled RIP but you don't see any routes in 'show ip route', that could mean that you didn't enter the networks with the 'network' command or you entered the wrong ones, the neighboring router is not using RIP or has it disabled, or simply you do not have connectivity with the neighboring router (bad interface IP configuration, no clock rate).

If CHAP is enabled, the state of the line will depend on whether the CHAP 3-way handshake was successful. If it was LCP will be open, if it wasn't, LCP will be closed. Remember that LCP provides PPP with link control functions, and since you have CHAP enabled, then most likely PPP is enabled.
And one last thing: CHAP passwords are case-sensitive: 'cisco' and 'cIsco' are different passwords and the CHAP handshake would fail (LCP closed). Again: review your PPP/CHAP theory.
I hope this helps.

examfear

2003-09-17, 11:39 am

Thanks!

Please suggest me SIMULATION SOFTWARES, for practice with TROUBLESHOOTING QUESTIONS.

I want to pass, as i am planning to give it again.

Thanks!

martek

2003-09-17, 11:44 am

I used RouterSim CCNA 3.0 to practice my router commands.

Lemonade

2003-09-17, 12:00 pm

I highly recommend you to use RouterSim v3.0. Its really good. For more details.. go to www.routersim.com

martek

2003-09-17, 12:06 pm

One very important thing to remember when using RIP. The 'R' in the 'show ip route' output means that the router has learned a route from a neighboring router. So if the neighboring router is down or there's no connectivity due to a bad configuration, no 'R' will appear in 'show ip route'. Remember: enabling RIP and using the 'network' command does NOT mean you will automatically have one or more 'R' in 'show ip route'. It only means that the router will send and receive RIP updates. Whether there's any 'R' will depend on the status of neighboring routers. The same principle applies to other routing protocols.

Humbug

2003-09-17, 12:57 pm

You are right about the CHAP, it was mistake.

RenatoBerana

2003-09-17, 1:08 pm

CHAP is 3 way. I recommend you to use routersim 3.2 or boson simulator 5.04.

asteheske

2003-09-17, 3:43 pm

quote:
Martek :And one last thing: CHAP passwords are case-sensitive: 'cisco' and 'cIsco' are different passwords and the CHAP handshake would fail (LCP closed). Again: review your PPP/CHAP theory.

just to add to wat martek have explain:

Router(config)#hostname RouterA
Router(config)#username RouterB password XamN0te5

-When using the hostname command,remember that the username is the hostname of the remote router connecting to your router.

-Like martek said,it is case sensitive

-And Passwords on both routers must be the same

-You must have username and password configured for each remote system u are going to connect to.

-The remote routers must also be configured with usernames and passwords

Hope this helps~~

Cheers~~

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