What are the precautions for deploying multicast VLAN replication on a ring network


A multicast VLAN is the user VLAN of itself by default, so you do not need to run the multicast user-vlan command.

When configuring multicast VLAN replication on the S1720, S2700, S5700S-LI (except S5700S-28X-LI-AC and S5700S-52X-LI-AC), or S5700LI, pay attention to the following constraints:

-A user-side interface can be added to only one user VLAN. If the interface is added to multiple user VLANs, the user VLAN where multicast entries are generated first takes effect.
-The user-side interface also needs to be added to the multicast VLAN in the same mode as it is added to the user VLAN. For example, if the user-side interface is added to the user VLAN in untagged mode, it must be added to the multicast VLAN in untagged mode.
-To prevent broadcast of unknown multicast packets, enable the switch to drop unknown multicast packets. On the S2700SI or S2700EI, run the multicast drop-unknown command in the system view to enable this function. On the S1720, S2720, S5700S-LI or S5700LI, run the multicast drop-unknown command in the VLAN view to enable this function.

Other related questions:
How many devices at most can be deployed in an RRPP ring when RRPP is deployed on an S series switch
For S series switches, primary and secondary ports of the master node send Health packets. If the secondary port periodically receives Health packets, the master node considers the RRPP ring in Complete state and blocks the secondary port to eliminate loops. Health packets are forwarded through the chip, whose forwarding speed is high. Theoretically, an RRPP ring supports unlimited devices. However, when many devices are configured in an RRPP ring, it takes a long time to rectify any link or node fault. It is recommended that a maximum of 16 devices be configured in an RRPP ring.

What are the precautions for configuring multicast BFD
The BFD packets sent in multicast mode are untagged. When a port configured with multicast BFD receives tagged packets, it checks the tag of the packets. If the tag is different from the port's default VLAN ID, the port discards the packets. To configure multicast BFD on an interface, run the port default vlan command to specify the default VLAN of the interface.

What are the precautions for delivering dynamic VLANs
Dynamic VLANs are delivered in the following ways: 1. VLAN IDs 2. VLAN names To deliver dynamic VLANs based on VLAN names, configure the description that specifies the VLAN name in the VLAN view.

What are precautions for deploying the WLAN hot standby plan
Currently, Huawei products support dual link hot standby. When dual link hot standby is deployed, the interval at which heartbeat packets are transmitted must be the same on the active and standby ACs, no AC can function as a service gateway, service configurations must be the same on the active and standby ACs, and the active and standby ACs must use different IP address pools.

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