S series switches will how to deal with can not get the next hop from the FIB table


If the next hop cannot be found in the FIB table and there is no default route when S series switches (except S1700) received the packet,the packet will be discarded.

Other related questions:
Does an AR router support redirection to a next hop
The ARs support redirection to a next hop.

Routing table and FIB table
The functions and meanings of the routing table and FIB table are as follows: Routers forward packets based on routing tables and forwarding information base (FIB) tables. Each router maintains at least one routing table and one FIB table. A routing table stores routes discovered by various routing protocols. Routes are classified into the following types based on the origin: -Direct route: is discovered by link layer protocols. -Static route: is manually configured by network administrators. -Dynamic route: is discovered by dynamic routing protocols. Each entry in the FIB table contains the physical or logical interface through which a packet is sent to a network segment or host to reach the next router. An entry also indicates whether the packet can be sent to a destination host in a directly connected network.

How does an S series switches process packets if it fails to obtain the net-hop address from the FIB table
After an S series switches (except the S1700) receives a packet, if the switch cannot find the next-hop address in the FIB table and no default route is configured, the packet will be discarded.

Can the next hop address be not specified in a static route
You must specify the next hop address in a static route, but you can choose not to specify the outbound interface. The ip route-static ip-address mask Vlanif vlan-id command specifies the VLANIF interface as the outbound interface in a static route and does not specify the next hop address. This command is not recommended because it does not take effect and lowers device performance.

Delete entries in binding tables for IPSG (user-bind binding tables) on S series switches
Delete entries in a binding table for IPSG (user-bind binding table) on an S series switch (except the S1700) as follows: Binding entries include static entries and dynamic entries. Dynamic entries are automatically generated when DHCP snooping is enabled. To delete dynamic entries, disable DHCP snooping. Static entries are configured manually. To delete static entries, perform the following operations: 1. Run the display dhcp static user-bind all command to view all static binding entries on the switch. [HUAWEI] display dhcp static user-bind all 2. Delete binding entries as required. a. Delete the static binding entry of IP address [HUAWEI] undo user-bind static ip-address mac-address 0001-0001-0001 b. Delete the static binding entry of MAC address 0002-0002-0002. [HUAWEI]undo user-bind static mac-address 0002-0002-0002 c. Delete all static binding entries of GE0/0/1. [HUAWEI] undo user-bind static interface gigabitethernet 0/0/1 d. Delete all static binding entries in VLAN 10. [HUAWEI] undo user-bind static vlan 10 e. Delete all entries in the static binding table. [HUAWEI]undo user-bind static

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