(Optional) Optimizing a VRRP6 Group
To optimize a VRRP6 group, enable the ping to a virtual IPv6 address, set the interval at which the master device in the group sends NA packets, and disable a device from checking the hop count in received VRRP6 Advertisement packets.
Context
Table 5-2 describes VRRP6 group optimization functions.
Function Item |
Description |
|---|---|
Hosts can ping the virtual IPv6 address of a VRRP6 group configured on routers. This function can be used to monitor the connectivity of links between hosts and a gateway. |
|
Disabling a device from checking the hop count in received VRRP6 Advertisement packets |
A VRRP6-enabled device checks the hop count in received VRRP6 Advertisement packets. If the hop count in a VRRP6 Advertisement packet is not 255, the device discards the packet. If different vendors' devices are used on a network, checking the hop count in received VRRP6 Advertisement packets may cause a device to incorrectly discard packets. To prevent this issue, disable the device from checking the hop count in received VRRP6 Advertisement packets, implementing interworking between different vendors' devices. |
Specifying a mode that the master device uses to send ND packets |
A QinQ termination sub-interface sends ND packets with two tags and the inner tag is a range of VLAN IDs. To ensure that switches connected to users learn the correct MAC address of the VRRP6 group, the VRRP6 group on the QinQ termination sub-interface sends ND packets to all VLANs identified by inner VLAN IDs. This increases the burden on the VRRP6-enabled device. To release the burden, the VRRP6-enabled device can be configured to send ND packets carrying only the minimal inner VLAN ID. |
After a Huawei device receives a VRRP6 packet, it calculates the packet's checksum based on the content including the IPv6 pseudo header. However, a non-Huawei device may calculate the packet's checksum based on the content excluding the IPv6 pseudo header. As a result, VRRP negotiation between the Huawei and non-Huawei devices may fail. To resolve this issue, run the vrrp6 checksum exclude pseudo-header command to configure the Huawei device to calculate the packet's checksum based on the content excluding the IPv6 pseudo header. |
Procedure
- Enable the ping to a virtual IPv6 address.
- Disable a device from checking the hop count in received VRRP6 Advertisement packets.
- Specifying a mode that the master device uses to send ND packets
- Configure a device to calculate a VRRP6 packet's checksum based on the content excluding the IPv6 pseudo header.
