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RIPng Questions

July 19th, 2017 in ROUTE 300-101 Go to comments

Question 1

Explanation

The default timers of RIP and RIPng are the same. The meanings of these timers are described below:

Update: how often the router sends update. Default update timer is 30 seconds
Invalid (also called Expire): how much time must expire before a route becomes invalid since seeing a valid update; and place the route into holddown. Default invalid timer is 180 seconds
Holddown: if RIP receives an update with a hop count (metric) higher than the hop count recording in the routing table, RIP does not “believe in” that update. Default holddown timer is 180 seconds
Flush: how much time since the last valid update, until RIP deletes that route in its routing table. Default Flush timer is 240 seconds

RIPng_timer.jpg

Question 2

Question 3

Question 4

Question 5

Question 6

Explanation

This is how to disable split horizon processing for the IPv6 RIP routing process named digitaltut:

Router(config)# ipv6 router rip digitaltut
Router(config-rtr)#no split-horizon

Note: For RIP (IPv4), we have to disable/enable split horizon in interface mode. For example: Router(config-if)# ip split-horizon

Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6/command/ipv6-cr-book/ipv6-s6.html

Question 7

Explanation

This is how to change the timers for RIPng:

R1(config)#ipv6 router rip digitaltut
R1(config-rtr)#timers 5 15 10 30 (5: Update period; 15: Route timeout period; 10: Route holddown period; 30: Route garbage collection period)

Note: For IPv4 RIP, we have to change the timers in “(config-router)#”.

Comments
  1. correct it
    September 24th, 2017

    Question 5

    RIPng Question. Cannot receive RIPng updates. Why?
    A. Firewall Port block UDP 520
    B. Firewall Port block TCP 520
    C. Firewall Port block UDP 521
    D. Firewall Port block TCP 521

    Correct answer is A.. most of the questions are wrong in this site.

  2. corrected
    September 25th, 2017

    C is correct for RIPng

  3. incorrect it
    October 12th, 2017
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