In the case of multi-load balancing of S-series switches, how does tunnel management select tunnels in multiple tunnels?

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If the selected tunnel state changes, such as the first down, a tunnel is randomly selected from the alternate tunnel.

Other related questions:
How does the tunnel management module select tunnels in multi-path load balancing on S series switches
Q: How does the tunnel management module select tunnels in multi-path load balancing? If the number of tunnels for load balancing is set to 6 and eight LSP tunnels are available, how are tunnels selected during tunnel iteration? If a selected tunnel is in Down state, what will the tunnel management module select tunnels? If the selected tunnel becomes Up, what will the tunnel management module select tunnels? Q: TNLM randomly selects six tunnels and returns the tunnels to RM. If the state of a selected tunnel changes, for example, the Down state, TNLM selects one tunnel from the two alternate tunnels. If the selected tunnel becomes Up and the number of tunnels for load balancing is smaller than 6, TNLM selects another six tunnels for RM. Otherwise, the Up and Down states of a tunnel have no impact on load balancing.

How to select a tunnel among multiple tunnels working in load balancing mode
If the number of tunnels is set to 6 for load balancing, how to select six LSP tunnels from eight ones during tunnel iteration? If the selected tunnels enter the Down state, how to re-select tunnels? If the selected tunnels go Up from the Down state, how to re-select tunnels? The TNLM randomly selects six tunnels and then returns them to the RM. If the status of the selected tunnels changes (for example, the first tunnel enters the Down state), the TNLM randomly selects another tunnel from two candidate ones. If the tunnels go Up from the Down state and there are fewer than six tunnels for load balancing, the TNLM is triggered to re-select six tunnels and then returns them to the RM. Otherwise, the status of tunnels does not affect load balancing.

Do S series switches support GRE
The following models and versions of S series switches excluding the S1700 support GRE VPN: -Model- -Starting Version - S5710EI V200R003 (V200R006 and later versions do not support the S5710EI.) S5700HI V200R003 (V200R006 and later versions do not support the S5700HI.) S5710HI V200R003 (V200R006 and later versions do not support the S5710HI.) S5720EI V200R007C00 (V200R007C10 and later versions do not support the S5720EI.) S5720HI V200R006 S6300EI V200R005 (V200R006 and later versions do not support the S6300EI.) S6320EI V200R008 S7700 V100R003 S9700 V200 R001 S12704 V200R008 S12708/S12712 V200R005 S9300 V100R002 S9300E V200R002 Modular switches (S7700/S9700/S9300/S12700) have the following limitations: - SA series cards (excluding the ET1D2X12SSA0 card) do not support the GRE function. - In V200R005, X1E series cards and the XGE interface connecting ACU2/ET1D2IPS0S00/ET1D2FW00S00/ET1D2FW00S01/ET1D2FW00S02/LE1D2FW00S01 card do not support the GRE function. - In V200R006 and later versions, if the tunnel interface is configured with the service link function, the tunnel type, source address, and destination address configured on this interface cannot be modified.

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