A DHCP configured router is connected directly to a switch that has been provisioned with DHCP
snooping. IP Source Guard with the ip verify source port-security command is configured under
the interfaces that connect to all DHCP clients on the switch. However, clients are not receiving an
IP address via the DHCP server. Which option is the cause of this issue?
A.
The DHCP server does not support information option 82.
B.
The DHCP client interfaces have storm control configured.
C.
Static DHCP bindings are not configured on the switch.
D.
DHCP snooping must be enabled on all VLANs, even if they are not utilized for dynamic
address allocation.
DHCP configured router = the router itself has been configured as DHCP server
I BELIEVE that we CAN NOT configure option 82 on a router.
Since ip verify source port-security command has been issued; it requires option 82 to be coupled with it.
Source for third sentence;
https://supportforums.cisco.com/discussion/11522561/ip-source-guard-ip-mac-and-option-82-requirement
Apart from question; the source literature is interesting
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http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_53_se/configuration/guide/2960scg/swdhcp82.html
The DHCP server must support option 82, or the client is not assigned an IP address.
Ctrl + F the above key words and witness the magic 🙂
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