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Failed to obtain the IP address

Created: Sep 18, 2019 08:50:55Latest reply: Sep 18, 2019 08:53:13 143 1 0 0
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Hello all,

I have a question Clients fail to obtain IP addresses because a large number of DHCP packets are forwarded when a large number of clients go online and apply for IP addresses simultaneously, and some clients fail to obtain IP addresses.

Networking diagram:
en-us_image_0101413752.png

Thanks!



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jason_hu
Admin Created Sep 18, 2019 08:53:13 Helpful(1) Helpful(1)

Hello@ster
1.Prevent a large number of users from going online simultaneously. For the Layer 2 access device (non-DHCP snooping-enabled device), disable the DHCP function
2.For DHCP attacks that may exist on the network, enable the attack source tracing function on the switch. If a large number of DHCP packets are sent from the same user on the network, the attack source tracing function detects the MAC address of the user and a blacklist can be configured to forbid this attack user.
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jason_hu
jason_hu Admin Created Sep 18, 2019 08:53:13 Helpful(1) Helpful(1)

Hello@ster
1.Prevent a large number of users from going online simultaneously. For the Layer 2 access device (non-DHCP snooping-enabled device), disable the DHCP function
2.For DHCP attacks that may exist on the network, enable the attack source tracing function on the switch. If a large number of DHCP packets are sent from the same user on the network, the attack source tracing function detects the MAC address of the user and a blacklist can be configured to forbid this attack user.
View more
  • x
  • convention:

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