3com 5500-ei pwr Guia De Referência

 

3-4 

Use the undo dhcp-snooping information remote-id command to restore the default value of the 

remote ID sub-option in Option 82. 

By default, the remote ID sub-option in Option 82 is the MAC address of the DHCP Snooping device 

that received the DHCP client’s request. 

# Configure the remote ID sub-option of Option 82 as the system name (sysname) of the DHCP 

snooping device. 

<Sysname> system-view 

System View: return to User View with Ctrl+Z. 

[Sysname] dhcp-snooping information remote-id sysname 

dhcp-snooping information strategy { drop | keep | replace } 

undo dhcp-snooping information strategy 

System view, Ethernet port view 

drop: If a packet contains Option 82, DHCP snooping drops this packet.  

keep: If a packet contains Option 82, DHCP snooping keeps and forwards this packet.  

replace: If a packet contains Option 82, DHCP snooping replaces the original Option 82 field with the 

Option 82 field having the specified padding content and forwards the packet.  

Use the dhcp-snooping information strategy command in system view to configure a handling policy 

for DHCP requests that contain Option 82 sent by the DHCP client.  

Use the undo dhcp-snooping information strategy command to restore the default handling policy. 

Use the dhcp-snooping information strategy command in Ethernet port view to configure a handling 

policy for requests that contain Option 82 received on the current port. 

Use the undo dhcp-snooping information strategy command to restore the default handling policy.  

By default, after DHCP-snooping Option 82 support is enabled, DHCP snooping replaces the Option 82 

field in the requests sent by the DHCP clients.