What type of OSPF area allows only LSA-types 1 and 2 as well as a single type-3 default route?
Highlight for anwer: Totally stubby area
March 31, 2009
March 30, 2009
Core Knowledge Question of the Day: 30 March 2009
An NSSA Area Border Router will do what before advertising a Type-7 LSA into a non-NSSA area?
Highlight for answer: Translate it to a Type-5 LSA
March 28, 2009
Internetwork Expert: Advanced Technologies Live Online Class $495
If you’re a CCIE candidate and you’re on twitter, it would behoove [HAH! I just used ‘behoove’ in a sentence] to follow the vendors’ tweets as they will occasionally offer discounts and even free stuff. This weekend Internetwork Expert is offering a great deal:
Weekend Special: CCIE Advanced Technologies Live Online Class – Only $495, Discount code “ADVTECH09” http://members.internetworkexpert.com/
You can choose the live (online) version of the Advanced Technologies Class for any track. Plus you get access to the recorded online COD as well. Normally the live version sells for $1,495 so you’d save $1,000. Even if you’re only interested in the recorded version, you’d still save $500 off of the $995 price. This is a great deal for anyone who has been looking at getting the Advanced Technologies COD or who wants to start on another track. You’ll need to hurry though because the offer is only good this weekend.
For those using twitter, you’ll want to follow:
http://twitter.com/inetraining – Internetwork Expert
http://twitter.com/ipexpert – IPexpert (they have various accounts based on geography as well)
http://twitter.com/mekahldownish – IPexpert social network guru
March 27, 2009
Core Knowledge Question of the Day: 27 March 2009
What is the multicast address that an OSPF device uses to communicate with the designated router?
Highlight for answer: 224.0.0.6
TIP: If you are allowed access to a command prompt during the open-ended questions and you want to verify your answer (or you know that the answer is 224.0.0.x but you forget what the last octet is)then you can always do an ‘nslookup 224.0.0.x’ and plug in values for the last octet.
Highlight below for some examples (from Linux but Windows will return the same/similar results):
1.0.0.224.in-addr.arpa name = ALL-SYSTEMS.MCAST.NET.
2.0.0.224.in-addr.arpa name = ALL-ROUTERS.MCAST.NET.
5.0.0.224.in-addr.arpa name = OSPF-ALL.MCAST.NET.
6.0.0.224.in-addr.arpa name = OSPF-DSIG.MCAST.NET.
9.0.0.224.in-addr.arpa name = RIP2-ROUTERS.MCAST.NET.
10.0.0.224.in-addr.arpa name = IGRP-ROUTERS.MCAST.NET.
March 26, 2009
logging x.x.x.x vs logging host x.x.x.x
If you’ve done any syslog configuration on a router, then you’re probably used to setting the syslog server with:
Rack1R2(config)#logging 1.2.3.4
If you’ve looked a little closer at the logging commands, you’ve probably noticed that there is also a ‘logging host’ command. So what is the difference between using ‘logging x.x.x.x’ and ‘logging host x.x.x.x’? It turns out that there is no difference*
Rack1R2(config)#logging 1.2.3.4
Rack1R2(config)#logging host 5.6.7.8
Rack1R2(config)#do sh run | i logging
logging 1.2.3.4
logging 5.6.7.8
* As long as you don’t add additional configuration after the IP Address with the ‘logging host’ command
You can use either
Rack1R2(config)#logging host 1.1.1.1 transport tcp port 666
Rack1R2(config)#do sh run | i logging
logging host 1.1.1.1 transport tcp port 666
The one thing you need to keep an eye out for is that once you’ve configured the “Syslog of the Beast”, if you then configure ‘logging 1.1.1.1’ or ‘logging host 1.1.1.1’ by accident, you’ll blow away your existing logging host configuration:
Rack1R2(config)#logging host 1.1.1.1
Rack1R2(config)#do sh run | i logging
logging 1.1.1.1
Command reference: logging host
Core Knowledge Question of the Day: 26 March 2009
What is the primary difference between SNMP traps and SNMP inform requests (informs)?
Highlight for answer: SNMP informs are traps that include a request for confirmation of receipt from the SNMP manager.
March 25, 2009
Group Study: The Top Ten Indications You Have Sat the Lab Too Many Times
I stumbled across this on GroupStudy:
The Top Ten Indications You Have Sat the Lab Too Many Times :
Number 10 – Visitor parking at Cisco features a spot with your name on it.
Number 9 – Visa calls you to inquire if someone at Cisco may have stolen your Credit Card.
Number 8 – You have earned 65,000 flight miles in the last year.
Number 7 – Your wife asks “Who the hell are you?” when you return home from your latest attempt.
Number 6 – You can now type 90 words per minute.
Number 5 – Your boss indicates that he has a task for you and you respond “How many points is it worth?”
Number 4 – You have recurring nightmares about redistribution and ping packet drops
Number 3 – Your new nickname on the InternetworkExpert forum is “That poor bastard!”
Number 2 – While romancing with your girl, all you can think about is full IGP reachability.
and the Number 1 Indication You Have Sat the Lab Too Many Times:
The proctor hands you your badge and says “You are on Rack 5 – AGAIN!”
LoL
Deepinder Singh Babbar
CCIE R&S #20182
Core Knowledge Question of the Day: 25 March 2009
R1#r?
*r=resume *ri=”show ip route” release
reload rename renew restart
resume rlogin rsh
What is true about the commands preceded by asterisks?
Highlight for answer: They are aliases. More specifically, they are exec level aliases. Even more specifically, ‘r’ is one of the IOS Default Command Aliases, while ‘ri’ is a custom alias.
March 24, 2009
Core Knowledge Question of the Day: 24 March 2009
What are the default OSPF hello-inverval and dead-interval for the OSFP broadcast network type?
Highlight for answer: 10 seconds for the hello-interval and 40 seconds for the dead-interval.
March 23, 2009
Core Knowledge Question of the Day: 23 March 2009
By default, OSPF floods new LSAa over all interfaces in the same area except…..
Highlight for answer: the interface that the LSA arrives on.
CCIE Pursuit Blog 