25.7.2 Notes on using the inter-port relay blocking functionality
- <Structure of this section>
(1) Coexistence with other functions
See "22.3 Coexistence of Layer 2 switch function and other functions".
(2) Blocking between ports for which more than one VLAN is set for a port
The inter-port relay blocking functionality blocks all communications for both Layer 2 forwarding within a VLAN, and Layer 3 forwarding between VLANs. When communication is blocked between ports with multiple VLANs set on a single port, such as on a trunk port, Layer 3 forwarding between VLANs is also blocked between those ports.
(3) Notes on using Spanning Tree Protocols simultaneously
When a Spanning Tree Protocol is run on a port that is blocking communication, communication might no longer be possible, depending on the topology.
(4) Frames that are not blocked by the port-to-port relay blocking function
The inter-port forwarding block function blocks only frames forwarded by hardware. Frames transmitted by software-such as self-originated packets or packets with IP option-are not blocked.