Refer to the exhibit. HostA and HostB cannot receive IP addresses from the DHCP server. The switches are configured with the DHCP snooping. Which configuration on SW3 resolves the issue?
I think the answer is D, because in the cfg avec the SW3 in the exhibit, there is no configuration about the ip helper-adress !
Disable the option 82 with will not résolve the problem because the SW can not relay the paquets to the server without the helper dhcp.
Correct answer is B. The reason why D is incorrect because the ip helper address for ipv6 is different from ipv4.
R1# config t
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)# interface gigabitethernet0/0
R1(config-if)# ipv6 dhcp relay destination 2001:db8:a:b::7
Why not D?
The dhcp server is in a different subnet/vlan 1.0.0.0/30 than hosts (vlan 5 for host A 10.5.5.0/24 and vlan 6 for host B 10.6.6.0/24)
I can't see in the log messages something like: DHCP_SNOOPING: invalid DHCP options - unable to parse
In conclusion, why do you think B is the best answer?
The "no ip dhcp snooping information option command" disables the insertion of DHCP Option 82. This might be necessary in certain environments where devices (like older DHCP servers or clients) do not support or need Option 82 information.
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