Refer to the exhibit. An IPv6 address must be obtained automatically on the LAN interface on R1. Which command must be implemented to accomplish the task?
A.
ipv6 address autocontig
B.
ipv6 address dhcp
C.
ipv6 address fe80::/10
D.
ipv6 address 2001:db8:d8d2:1008:4332:45:0570::/64
No; SLAAC relies on RA messages to function, but here we are configuring the IP address on a router interface, with no other routers on that interfaces network. From where will it receive the RA messages? Exactly; it won't.
However, there is a DHCPv6 server on the network, and C and D are static configurations.
So obviously, the answer must be B.
So as this brother said there is DHCPV6 server, but if there is DHCP server we have to use "IP address DHCP", option B, but if there is no DHCP server we use SLAAC.
So the correct answer is I think "B"
"ipv6 address autoconfig": The interface should only obtain its configuration using RAs and the stateless address autoconfiguration (SLAAC). With ipv6 address autoconfig, a router will not attempt to contact DHCPv6.
"ipv6 address dhcp": DHCPv6 does not have an option to advertise a default gateway, and the default gateway still has to be discovered through RAs. It will depend on DHCPv6 to discover its address and prefix, and on RAs to discover its gateway.
So if the DHCPv6 is in the same LAN that the R1 LAN interface is the best option.
B is the best correct answer
https://community.cisco.com/t5/ipv6/ipv6-address-autoconfig-vs-ipv6-address-dhcp/td-p/2710597
The ipv6 address dhcp command allows the router interface to obtain an IPv6 address automatically from a DHCPv6 server.
Option A - ipv6 address autoconfig, would configure the router to use Stateless Address Autoconfiguration (SLAAC), not DHCPv6.
Option C- refers to a link-local address prefix (fe80::/10), which is not used for obtaining a globally routable IPv6 address.
Option D- is a manual static address assignment, not an automatic process.
B and A might be correct, depending on the context. ¨A¨ doesn't need, a DHCP server cause it use SLAC; ¨B¨ requires a DHCP server. SW1 has a DHCP server connected to an interface.
I believe its B for the exam, although in reality, like Dutch said, its safer/better:
There are a few reasons why you might not want to use DHCP for IPv6 addresses.
DHCP is a stateful protocol, which means that it requires a DHCP server to maintain a database of IP addresses and their corresponding lease information. This can be a burden on the DHCP server, especially in large networks.
DHCP is not as secure as SLAAC. When a device uses DHCP, it sends its MAC address to the DHCP server, which can be used to track the device.
DHCP can be more complex to configure than SLAAC.
I wanted to answer with A but then I saw there is a DHCP server, it's like implicitly telling me to use it and I think this is a scenario based question... so I'll go for B (why use autoconfig if there is a DHCP server?)
B. is not a valid command. This is from the cisco site:
Configuring the Stateless DHCPv6 Client
SUMMARY STEPS
1. enable
2. configure terminal
3. interface type number
4. ipv6 address autoconfig [default]
5. end
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_dhcp/configuration/xe-16/dhcp-xe-16-book/ip6-dhcp-stateless-auto.html
This section is not available anymore. Please use the main Exam Page.200-301 Exam Questions
Log in to ExamTopics
Sign in:
Community vote distribution
A (35%)
C (25%)
B (20%)
Other
Most Voted
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
Dutch012
Highly Voted 2 years, 2 months ago[Removed]
1 year, 7 months ago[Removed]
1 year, 4 months agomagarsaaaddaamuu
10 months, 1 week agoDavidCisco
Highly Voted 2 years, 1 month agoJSMM
Most Recent 1 month agoSimrankoor
5 months, 3 weeks agoShaifalimittal02
8 months agotroisrivers
9 months agoSaleem360
9 months, 4 weeks ago[Removed]
1 year, 1 month agoNet_eng_pogi
1 year, 1 month agoTommyCisco
1 year, 2 months agoa67c04a
1 year, 3 months agoTechpro30
1 year, 8 months agoTechLover
1 year, 10 months ago[Removed]
1 year, 10 months agoberpiy1028
1 year, 7 months agogulu73
1 year, 11 months agoFriday_Night
1 year, 11 months agoMassNastty1
1 year, 11 months agoVyncy
1 year, 11 months ago