HPE FlexNetwork 5130 EI Series Layer 3-Ip Services Configuration Guide

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4. Configure an interface in the VLAN as a trusted port.
dhcp snooping trust interface interface-type interface-number
By default, all interfaces in the VLAN are untrusted ports.
5. (Optional.) Enable recording of client information in DHCP snooping entries.
dhcp snooping binding record
By default, recording of client information in DHCP snooping entries is disabled.
Configuring DHCP snooping support for Option 82
Restrictions and guidelines
• The Option 82 configuration on a Layer 2 Ethernet interface that has been added to an
aggregation group does not take effect unless the interface leaves the aggregation group.
• To support Option 82, you must configure Option 82 on both the DHCP server and the DHCP
snooping device. For information about configuring Option 82 on the DHCP server, see
"Enabling handling of Option 82."
• If Option 82 contain
s the device name, the device name must contain no spaces. Otherwise,
DHCP snooping drops the message. You can use the
sysname command to specify the
device name. For more information about this command, see Fundamentals Command
Reference.
• DHCP snooping uses "outer VLAN tag.inner VLAN tag" to fill the VLAN ID field of sub-option 1
in verbose padding format if either of the following conditions exists:
{ DHCP snooping and QinQ work together.
{ DHCP snooping receives a DHCP packet with two VLAN tags.
For example, if the outer VLAN tag is 10 and the inner VLAN tag is 20, the VLAN ID field is
000a.0014. The hexadecimal digit a represents the outer VLAN tag 10, and the hexadecimal
digit 14
represents the inner VLAN tag 20.
Procedure
1. Enter system view.
system-view
2. Enter interface view.
interface interface-type interface-number
3. Enable DHCP snooping to support Option 82.
dhcp snooping information enable
By default, DHCP snooping does not support Option 82.
4. (Optional.) Configure a handling strategy for DHCP requests that contain Option 82.
dhcp snooping information strategy { drop | keep | replace }
By default, the handling strategy is replace.
If the handling strategy is
replace, configure a padding mode and padding format for Option
82. If the handling strategy is
keep or drop, you do not need to configure any padding mode
or padding format for Option 82.
5. (Optional.) Configure the padding mode and padding format for the Circuit ID sub-option.
dhcp snooping information circuit-id { [ vlan vlan-id ] string
circuit-id | { normal | verbose [ node-identifier { mac | sysname |
user-defined node-identifier } ] } [ format { ascii | hex } ] }
By default, the padding mode is normal and the padding format is hex for the Circuit ID
sub-option.

HPE FlexNetwork 5130 EI Series Specifications

General

Brand	HPE
Model	FlexNetwork 5130 EI Series
Category	Switch
Language	English