Can the S series switch public network routing iterate to tunnel?

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For S-series switches, by default, untagged routes can only be iterated to the out interface and next hop, can not be iterated to tunnel

Other related questions:
Can public network routes be iterated to tunnels on S series switches
Q: Can public network routes be iterated to tunnels? A: For S series switches, by default, an unlabeled public network route can only be iterated to the outbound interface and next hop, but not a tunnel. If the route recursive-lookup tunnel command is executed, an unlabeled public network route can inherit the tunnel ID of an IGP or static route, allowing packets to be forwarded through MPLS routes. The route recursive-lookup tunnel command enables the switch to iterate unlabeled public network routes to tunnels. This command is valid only to unlabeled public network routes that require tunnel iteration. To control tunnel iteration more precisely, you can filter unlabeled public network routes by specifying an optional IP prefix list. The undo route recursive-lookup tunnel command disables tunnel iteration.

Why is the number of routes in the routing table inconsistent with the number of FIB entries after a required route iteration on an S series switches
Q: Why is the number of routes in the routing table inconsistent with the number of FIB entries after a required route iteration? A: After routes are iterated as required, routes of multiple outbound interfaces are not generated and there is only one route with multiple outbound interfaces. This route is iterated to multiple routes when delivered to the FIB. As a result, the number of routes in the routing table is inconsistent with the number of FIB entries. Among the route flags, R indicates that the route is iterated, and D indicates that the route is successfully delivered to the FIB.

Configure NAT outbound on S series switches to allow private network users to access public networks
S7700, S9700, and S9300 series modular switches use SPUs to support the NAT outbound function.

Configure NAT server on S series switches to allow public network users to access servers on the private network
S7700, S9700, and S9300 series modular switches use SPUs to support the NAT server function.

Routing configuration problem of out-of-band network management of S series switches
S series switches are designed for management purpose. When using out-of-band network management, it is common to avoid configuring the default route to the gateway address of the out-of-band network management. this is to prevent to pull user business data into the management network port, resulting in the CPU of the device. When using the outband network management, it is generally recommended to configure the host route or the detailed route.

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