Omitir para ir al contenido principal
  • Hacer pedidos rápida y fácilmente
  • Ver pedidos y realizar seguimiento al estado del envío
  • Cree y acceda a una lista de sus productos
  • Administre sus sitios, productos y contactos de nivel de producto de Dell EMC con Administración de la empresa.

Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

PDF

VLAN Stacking in Multi-Vendor Networks

The first field in the VLAN tag is the tag protocol identifier (TPID), which is 2 bytes. In a VLAN-stacking network, after the frame is double tagged, the outer tag TPID must match the TPID of the next-hop system.

While 802.1Q requires that the inner tag TPID is 0x8100, it does not require a specific value for the outer tag TPID. Systems may use any 2-byte value; the Dell Networking OS uses 0x9100 (shown in the following) while non-Dell Networking systems might use a different value.

If the next-hop system’s TPID does not match the outer-tag TPID of the incoming frame, the system drops the frame. For example, as shown in the following, the frame originating from Building A is tagged VLAN RED, and then double-tagged VLAN PURPLE on egress at R4. The TPID on the outer tag is 0x9100. R2’s TPID must also be 0x9100, and it is, so R2 forwards the frame.

Given the matching-TPID requirement, there are limitations when you employ Dell Networking systems at network edges, at which, frames are either double tagged on ingress (R4) or the outer tag is removed on egress (R3).


Califique este contenido

Preciso
Útil
Fácil de comprender
¿Este artículo fue útil?
0/3000 characters
  Proporcione calificaciones (1 a 5 estrellas).
  Proporcione calificaciones (1 a 5 estrellas).
  Proporcione calificaciones (1 a 5 estrellas).
  Seleccione si el artículo fue útil o no.
  Los comentarios no pueden contener estos caracteres especiales: <>"(", ")", "\"