121
The VLANs that a trunk port is member of may be limited by the use of
Allowed VLANs
Frames classified to a VLAN that the port is not a member of are
discarded
By default, all frames but frames classified to the Port VLAN (a.k.a.
Native VLAN) get tagged on egress. Frames classified to the Port
VLAN do not get C-tagged on egress
Egress tagging can be changed to tag all frames, in which case only
tagged frames are accepted on ingress
Hybrid
Hybrid ports resemble trunk ports in many ways, but adds additional port
configuration features. In addition to the characteristics described for trunk ports,
hybrid ports have these abilities:
Can be configured to be VLAN tag unaware, C-tag aware, S-tag
aware, or S-custom-tag aware
Ingress filtering can be controlled
Ingress acceptance of frames and configuration of egress tagging can
be configured independently
Port VLAN
Determines the
port's VLAN ID
(
PVID
). Allowed VLANs are in the range 1
through 4095, default being 1.
■
On ingress, frames get classified to the Port VLAN if the port is configured as
VLAN unaware, the frame is untagged, or VLAN awareness is enabled on
the port, but the frame is priority tagged (VLAN ID = 0).
■
On egress, frames classified to the Port VLAN do not get tagged if Egress
Tagging configuration is set to untag Port VLAN.
The Port VLAN is called an "
Access VLAN
" for ports in Access mode and Native
VLAN for ports in Trunk or Hybrid mode.
Port Type
Ports in hybrid mode allow for changing the port type, that is, whether a frame's
VLAN tag is used to classify the frame on ingress to a particular VLAN, and if so,
which TPID it reacts on. Likewise, on egress, the Port Type determines the TPID
of the tag, if a tag is required.
■
Unaware:
On ingress, all frames, whether carrying a VLAN tag or not, get classified
to the Port VLAN, and possible tags are not removed on egress.
■
C-Port:
On ingress, frames with a VLAN tag with TPID = 0x8100 get classified to
the VLAN ID embedded in the tag. If a frame is untagged or priority
tagged, the frame gets classified to the Port VLAN. If frames must be
Содержание NS4702-24P-4S-4X
Страница 1: ...NS4702 24P 4S 4X User Manual P N 1072829 REV 00 01 ISS 14JUL14 ...
Страница 23: ...23 Storage Temperature 10 70 degrees C Relative Humidity 5 95 non condensing ...
Страница 164: ...164 Figure 4 8 2 Multicast Flooding ...
Страница 183: ...183 Figure 4 8 14 IGMP Snooping VLAN Configuration Page Screenshot ...
Страница 189: ...189 Figure 4 8 17 MLD Snooping Groups Information Page Screenshot ...
Страница 203: ...203 Buttons Click to apply changes Click to undo any changes made locally and revert to previously saved values ...
Страница 208: ...208 Figure 4 9 6 QoS Egress Port Tag Remarking Page Screenshot ...
Страница 218: ...218 Deletes the QCE The lowest plus sign adds a new entry at the bottom of the list of QCL ...
Страница 229: ...229 Figure 4 9 18 Voice VLAN Configuration Page Screenshot ...
Страница 252: ...252 Buttons Click to apply changes Click to undo any changes made locally and revert to previously saved values ...
Страница 291: ...291 measurement is 100 ms A value of 0 ms indicates that there hasn t been round trip communication with the server yet ...
Страница 299: ...299 Figure 4 11 17 Add User Properties Screen Figure 4 11 18 Add User Properties Screen ...
Страница 336: ...336 Figure 4 14 2 LLDPMED Configuration Page Screenshot ...
Страница 357: ...357 Figure 4 15 4 VeriPHY Cable Diagnostics Page Screenshot ...
Страница 367: ...367 ...
Страница 375: ...375 Figure 4 16 10 Port Power Consumption Screenshot Buttons Click to refresh the page immediately ...
Страница 391: ...391 ...