Can L2TP be used in scenarios where active and standby LNSs are deployed

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L2TP can be used in scenarios where active and standby LNSs are deployed. When the active LNS fails, services are switched to the standby LNS. However, L2TP connection requests initiated by the LAC cannot reach the active LNS. To ensure that L2TP connection requests are sent to the standby LNS, you must configure the IP address of the standby LNS on the LAC, so that when the first IP address is unreachable, the LAC sends the request packets to the address of the standby LNS.

You can configure IP addresses of a maximum of four LNSs on the LAC.

Other related questions:
Does the AR support active and standby LNSs
The AR supports active and standby LNSs. When the active LNS fails, services are switched to the standby LNS and L2TP connection requests initiated by the LAC cannot reach the active LNS. The IP address of the standby LNS can be configured on the LAC. When the first address is unreachable, L2TP connection requests are sent to the second address based on the configuration sequence. A maximum of four LNS addresses can be configured on the AR.

Can two MCUs deployed on two different RMs be configured in active/standby mode?
Two MCUs deployed on two different RMs cannot be configured in active/standby mode.

How Do I Deploy the Active/Standby VRRP Service?

For VPN, direct connection, cross-VPC, and Internet access, use the VRRP IP address as the VIP to create a load balancer if you want to deploy the VRRP service by configuring Keepalived on the ECSs.


Slots where the active and standby SCC boards reside
The slots occupied by the active and standby SCC boards are not fixed. Generally, when the system starts, the SCC board with a smaller slot ID serves as the active SCC board, and the other SCC board serves as the standby SCC board. You can query the active/standby status of an SCC board by using either of the following methods: 1. View the ACT indicator of the SCC board. If the indicator is on, the SCC board is in the active state. If the indicator is off, the SCC board is in the standby state. 2. In the NE Explorer of the U2000, choose Configuration > Board 1+1 Protection from the Function Tree. Click Query. The working board, protection board, and current board can be queried. The current boards refer to the active SCC boards.

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