• provider
Provider mode uses user definable Ether Types per port (see Ether type parameter) to define
that a frame is Provider Tagged. Ports that are connected to standard Provider network devices,
or devices that use Tagged frames with an Ether Type other than 0x8100 should use this mode.
Frames, that ingress this port with an Ether Type that matches the port's "Ether Type" parameter
will be considered tagged, will have the tag's VID and PRI bits assigned to the frame (i.e. they
will be used for switching and mapping), and will have the Provider Tag removed from the frame.
If subsequent Provider Tags are found following the 1st Provider Tag, they too will be removed
from the frame with their VID and PRI bits being ignored. Modified frames will be padded if re-
quired.
Frames, that ingress this port with an Ether Type that does not match the "Ether Type" parameter
will be considered untagged. The ingressing frames are modified so they are ready to egress
out Customer ports (Normal Network Frame Mode ports) unmodified.
Frames that egress this port will always have a tag added (even if they were already tagged).
The added tag will contain this port's "Ether Type" as its Ether Type. The PRI bits will be the
Frame Priority assigned to the frame during ingress. The VID bits will be the source port's Default
VID bits (if the source port was in Normal Network mode), or the VID assigned to the frame during
ingress (if the source port was in Provider mode).
• ether type DSA
Valid only for the "p5 CPU" port.
Ether Type DSA mode uses standard Marvell DSA Tagged frame information following a user
definable Ether Type (see Ether type parameter). This mode allows the mixture of Normal Network
frames with DSA Tagged frames and is useful on ports that connect to a CPU.
Frames that ingress this port with an Ether Type that matches the port's "Ether Type" will be
considered DSA Tagged and processed accordingly. The frame's Ether Type and DSA pad bytes
will be removed so the resulting frame will be ready to egress out Marvell DSA Tag Mode ports
unmodified. Frames that ingress this port with a different Ether Type will be considered Normal
Network Frames and processed accordingly.
Marvell DSA Tag control frames that egress this port will always get the port's "Ether Type" inserted
followed by two pad bytes of 0x00 before the DSA Tag. Marvell DSA Tag Forward frames that
egress this port can egress just like the control frames (with the added Ether Type and pad) or
they can egress as if the port was configured in Normal Network mode. This selection is controlled
by the port's Egress Mode bits above.
Ether type
Ethernet frame type (often called EtherType) is used to indicate which protocol is encapsulated in
the payload of an Ethernet Frame. This parameter is important when one protocol is encapsulated
to another protocol.
Examples:
Comment
Standard
Ether type
Double-tagged, Q-in-Q or C-tag stacking
on C-tag. C-tag in IEEE 802.1ad frames.
IEEE 802.1q
0x8100
S-Tag
IEEE 802.1ad
0x88a8
S-Tag (backbone S-Tag)
IEEE 802.1ah
0x88e7
It is used very often. For example an old
non-standard 802.1QinQ protocol uses
this value.
--
0x9100
See
http://en.wikipedia.org/wiki/EtherType
for further details.
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Summary of Contents for RAy3-11
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