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

219
Restrictions and guidelines
• If you disable DHCPv6 snooping with the undo ipv6 dhcp snooping enable command, the
device deletes all DHCPv6 snooping entries, including those stored in the backup file.
• If you execute the
ipv6 dhcp snooping binding database filename command, the
DHCPv6 snooping device backs up DHCPv6 snooping entries immediately and runs auto
backup. This command automatically creates the file if you specify a non-existent file.
• The waiting period starts when a DHCPv6 snooping entry is learned, updated, or removed. The
DHCPv6 snooping device updates the backup file when the specified waiting period is reached.
All changed entries during the period will be saved to the backup file. If no DHCPv6 snooping
entry changes, the backup file is not updated.
Procedure
1. Enter system view.
system-view
2. Configure the DHCPv6 snooping device to back up DHCPv6 snooping entries to a file.
ipv6 dhcp snooping binding database filename { filename | url url
[ username username [ password { cipher | simple } string ] ] }
By default, the DHCPv6 snooping device does not back up the DHCPv6 snooping entries.
3. (Optional.) Manually save DHCPv6 snooping entries to the backup file.
ipv6 dhcp snooping binding database update now
4. (Optional.) Set the waiting time after a DHCPv6 snooping entry change for the DHCPv6
snooping device to update the backup file.
ipv6 dhcp snooping binding database update interval interval
By default, the DHCP snooping device waits 300 seconds to update the backup file after a
DHCP snooping entry change. If no DHCP snooping entry changes, the backup file is not
updated.
Setting the maximum number of DHCPv6
snooping entries
About setting the maximum number of DHCPv6 snooping entries
Perform this task to prevent the system resources from being overused.
Procedure
1. Enter system view.
system-view
2. Enter interface view.
interface interface-type interface-number
3. Set the maximum number of DHCPv6 snooping entries for the interface to learn.
ipv6 dhcp snooping max-learning-num max-number
By default, the number of DHCPv6 snooping entries for an interface to learn is not limited.
Configuring DHCPv6 packet rate limit
About DHCPv6 packet rate limit
This DHCPv6 packet rate limit feature discards exceeding DHCPv6 packets to prevent attacks that
send large numbers of DHCPv6 packets.

HPE FlexNetwork 5130 EI Series Specifications

General

Brand	HPE
Model	FlexNetwork 5130 EI Series
Category	Switch
Language	English