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dhcp-snooping & option 82

 
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Occasional Contributor

dhcp-snooping & option 82

Hello! I have the following problem.

dhcp enable on all HP J9855A 2530-48G-2SFP + switch

 

dhcp snooping
dhcp snooping vlan 1

interface Trk1
dhcp-snooping trust

 

and immediately I see agent.remote-id and agent.circuit-id on the DHCP server.

 

On an HP A5120-48G-PoE + EI switch

interface bridge aggregation 1

dhcp-snooping trust

dhcp snooping

but nothing changes here ... so the DHCP server does not get an agent.remote-id and agent.circuit-id

 

A dhcp-snooping display also lists the mac addresses but does not provide an agent.remote-id and agent.circuit-id

Am I missing something?

 

Thanks in advance,

 

1 REPLY 1
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Re: dhcp-snooping & option 82

Hallo, 

Beide Switches gehören zu unterschiedlichen Produktreihen, mit unterschiedlichen Betriebssystemen. Beim Aruba 2530 wird sofort nach dem Aktivieren von dhcp-snooping, DHCP Option 82 aktiviert und zwar der Switch setzt seine eigen MAC als remote ID und die Portnummer als circuit ID.

Beim 5120 ist das anders. DHCP Option 82 wird nicht zusammen mit dhcp-snooping aktiviert, sonder muss zusätzlich aktiviert werden. Das wäre der Befehl: dhcp-snooping information enable. Auf Seite 69, 70 hier sind alle Optionen erklärt.

https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=c02642180

Google Translate
Both switches belong to different product lines with different operating systems.
With the Aruba 2530, DHCP option 82 is activated immediately after activating dhcp-snooping.
The switch sets its own MAC as a remote ID and the port number as a circuit ID.
It's different with the 5120. DHCP option 82 is not activated together with dhcp-snooping,
but must also be activated. That would be the command: dhcp-snooping information enable.
On page 69, 70 all options are explained here. https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=c02642180

 

I am an HPE employee

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