Configuring Layer 2 Protocol Tunneling Mode
Context
You can configure Layer 2 protocol tunneling on the device to replace:
- Default multicast MAC address of Layer 2 protocol packets that can be identified by PEs with another multicast MAC address. This mode can be used to transparently transmit Layer 2 protocol packets of only STP, RSTP, and MSTP.
- Original multicast MAC address of Layer 2 protocol packets with a specified multicast MAC address. This mode can be used to transparently transmit all types of Layer 2 protocol packets.
Perform either of the following operations on PEs based on the Layer 2 protocol type and the required transparent transmission mode.
Procedure
- Replace the default multicast MAC address of Layer 2 protocols that can be identified by PEs with another multicast MAC address.
Only the S5720I-SI, S5720S-SI, S5720-SI, S5735-S, S5735S-S, S5735-S-I, S5730S-EI, S5730-SI, S6720-LI, S6720S-LI, S6720S-SI, and S6720-SI support this configuration.
- Replace the original multicast MAC address of Layer 2 protocol packets from user networks with a specified multicast MAC address.
- Run l2protocol-tunnel protocol-type group-mac group-mac
The original multicast destination MAC address of Layer 2 protocol packets is replaced with a specified multicast MAC address.
Do not replace the destination MAC addresses of SSTP, STP, GVRP, and GMRP packets with the same multicast MAC address.
When configuring Layer 2 protocol tunneling, do not use the following multicast MAC addresses to replace the destination MAC address of Layer 2 protocol packets:
- Destination MAC addresses of BPDUs: 0180-C200-0000 to 0180-C200-002F
- Destination MAC addresses of Smart Link packets: 010F-E200-0004
- Special multicast MAC addresses: 0100-0CCC-CCCC and 0100-0CCC-CCCD. By default, 0100-0CCC-CCCD are not destination MAC addresses of BPDU packets.
- Common multicast MAC addresses that have been used on the switch
- Run l2protocol-tunnel protocol-type group-mac group-mac