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- Table of Contents
-
- 05-Layer 2—LAN Switching Configuration Guide
- 00-Preface
- 01-MAC address table configuration
- 02-Ethernet link aggregation configuration
- 03-Port isolation configuration
- 04-VLAN configuration
- 05-VLAN termination configuration
- 06-Loop detection configuration
- 07-Spanning tree configuration
- 08-LLDP configuration
- 09-Layer 2 forwarding configuration
- Related Documents
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| Title | Size | Download |
|---|---|---|
| 09-Layer 2 forwarding configuration | 45.12 KB |
Configuring normal Layer 2 forwarding
About normal Layer 2 forwarding
Verifying and maintaining normal Layer 2 forwarding
Displaying and clearing Layer 2 forwarding statistics
Configuring fast Layer 2 forwarding
Verifying and maintaining fast Layer 2 forwarding
Displaying fast Layer 2 forwarding entries
Configuring normal Layer 2 forwarding
About normal Layer 2 forwarding
When an incoming frame's destination MAC address does not match any Layer 3 interface's MAC address, normal Layer 2 forwarding forwards the frame through a Layer 2 interface.
The device uses the destination MAC address of the frame to look for a match in the MAC address table.
· The device forwards the frame out of the outgoing interface in the matching entry if a match is found.
· The device floods the frame to all interfaces in the VLAN of the frame if no match is found.
Normal Layer 2 forwarding is enabled by default.
Verifying and maintaining normal Layer 2 forwarding
Displaying and clearing Layer 2 forwarding statistics
To display Layer 2 forwarding statistics, execute the following command in any view:
display mac-forwarding statistics [ interface interface-type interface-number ]
To clear Layer 2 forwarding statistics, execute the following command in user view:
reset mac-forwarding statistics
Configuring fast Layer 2 forwarding
About fast Layer 2 forwarding
Fast Layer 2 forwarding improves packet forwarding efficiency by using a high-speed cache and flow-based technology. It identifies a flow by using the following items:
· Source IP address.
· Source port number.
· Destination IP address.
· Destination port number.
· Protocol number.
· Input interface.
· Output interface.
· VLAN ID.
Fast Layer 2 forwarding creates an entry in a high-speed cache by obtaining the forwarding information of a flow's first packet. Subsequent packets of the flow are forwarded based on the entry.
Fast Layer 2 forwarding is enabled by default.
Verifying and maintaining fast Layer 2 forwarding
Displaying fast Layer 2 forwarding entries
Perform all display tasks in any view.
· Display IPv4 fast forwarding entries.
display mac-forwarding cache ip [ ip-address ] [ slot slot-number ]
· Display IPv4 fast forwarding entries for fragments.
display mac-forwarding cache ip fragment [ ip-address ] [ slot slot-number ]
· Display IPv6 fast forwarding entries.
display mac-forwarding cache ipv6 [ ipv6-address ] [ slot slot-number ]
