vrrp6 nd send-mode simple

Function

The vrrp6 nd send-mode simple command enables a sub-interface for QinQ VLAN tag termination to send double-tagged ND packets carrying only the minimal inner VLAN ID when the VRRP status of the sub-interface in the Virtual Router Redundancy Protocol for IPv6 (VRRP6) backup group is master.

The undo vrrp6 nd send-mode simple command enables a sub-interface for QinQ VLAN tag termination to send double-tagged ND packets to all VLANs specified by the outer VLAN IDs and inner VLAN IDs when the VRRP status of the sub-interface in the VRRP6 backup group is master.

By default, double-tagged ND packets are sent to all VLANs specified by the outer VLAN IDs and inner VLAN IDs.

Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support this command.

Format

vrrp6 nd send-mode simple

undo vrrp6 nd send-mode simple

Parameters

None

Views

Eth-Trunk sub-interface view, GE sub-interface view, MultiGE sub-interface view, XGE sub-interface view, 25GE sub-interface view, 40GE sub-interface view, 100GE sub-interface view

Default Level

2: Configuration level

Usage Guidelines

A sub-interface for QinQ VLAN tag termination sends double-tagged ND packets when the VRRP status of the sub-interface in the VRRP backup group is master. If there is a range for the inner VLAN IDs, the sub-interface sends ND packets to all VLANs in this range to update VRRP backup group's MAC address entry on a downstream switch, exposing a heavy burden on the system. To prevent this problem, you can use the vrrp6 nd send-mode simple command to allow an ND packet carrying only the minimal inner VLAN ID to be sent, reducing the number of ND packets to be sent.

The vrrp6 nd send-mode simple command takes effect within VLANs specified only by inner VLAN IDs rather than outer VLAN IDs. For example, VLAN IDs in the outer tag range from 1 to 10 and VLAN IDs in the inner tag range from 1 to 10. After the vrrp6 nd send-mode simple command is run, ND packets carrying only inner VLAN 1 and outer VLAN IDs ranging from 1 to 10 are sent. 10 ND packets (10 outer VLAN IDs x 1 inner VLAN ID) are sent.

The vrrp6 nd send-mode simple command is configured only on a sub-interface for QinQ VLAN tag termination.

Example

# Allow ND packets carrying only inner VLAN 1 to be sent.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet0/0/1.1
[HUAWEI-GigabitEthernet0/0/1.1] qinq termination pe-vid 5 ce-vid 1 to 10
[HUAWEI-GigabitEthernet0/0/1.1] quit
[HUAWEI] ipv6
[HUAWEI] interface gigabitethernet0/0/1.1
[HUAWEI-GigabitEthernet0/0/1.1] ipv6 enable
[HUAWEI-GigabitEthernet0/0/1.1] ipv6 address auto link-local
[HUAWEI-GigabitEthernet0/0/1.1] vrrp6 vrid 1 virtual-ip FE80::7 link-local
[HUAWEI-GigabitEthernet0/0/1.1] vrrp6 nd send-mode simple