HPE FlexNetwork 5130 HI SERIES, Руководство по настройке

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Configuring many-to-one VLAN mapping in a network with
dynamic IP address assignment
In a network that uses dynamic address assignment, configure many-to-one VLAN mapping with
DHCP snooping.
The switch replaces the SVLAN tag of the downlink traffic with the associated CVLAN tag based on
the DHCP snooping entry lookup.
Configuration restrictions and guidelines
When you configure many-to-one VLAN mapping in a network that uses dynamic address
assignment, follow these restrictions and guidelines:
•
Before you configure many-to-one VLAN mapping, create the original VLANs and the
translated VLANs.
•
Customer-side many-to-one VLAN mapping is not supported on Layer 2 aggregate interfaces.
•
To ensure correct traffic forwarding from the service provider network to the customer network,
do not configure many-to-one VLAN mapping together with uRPF. For more information about
uRPF, see
Security Configuration Guide
.
•
To modify many-to-one VLAN mappings, first use the
reset dhcp snooping binding
command
to clear the DHCP snooping entries.
Configuration task list
Tasks at a glance
(Required.) Enabling DHCP snooping
(Required.) Enabling ARP detection
(Required.) Configuring the customer-side port
(Required.) Configuring the network-side port
Enabling DHCP snooping
Step Command Remarks
1.
Enter system view.
system-view
N/A
2.
Enable DHCP snooping.
dhcp snooping enable
By default, DHCP snooping is disabled.
For more information about DHCP
snooping configuration commands, see
Layer 3—IP Services Command
Reference
.
Enabling ARP detection
Enable ARP detection for the original VLANs and the translated VLANs.
To enable ARP detection:
Step Command Remarks
1.
Enter system view.
system-view
N/A
2.
Enter VLAN view.
vlan vlan-id
N/A
3.
Enable ARP detection.
arp detection enable
By default, ARP detection is disabled.
For more information about ARP
detection configuration commands, see