3The switch notes what the SVLAN table says (that is, the SVLAN tells the switch whether or not to forward a frame and if the forwarded frames should have tags).
4Then the switch applies the port filter to finish the forwarding decision. This means that frames may be dropped even if the SVLAN says to forward them. Frames might also be dropped if they are sent to a CPE (customer premises equipment) DSL device that does not accept tagged frames.
35.3.4.2.2Untagged Frames
1An untagged frame comes in from the LAN.
2The switch checks the PVID table and assigns a temporary VID of 1.
3The switch ignores the port from which the frame came, because the switch does not send a frame to the port from which it came. The switch also does not forward frames to “forbidden” ports.
4If after looking at the SVLAN, the switch does not have any ports to which it will send the frame, it won’t check the port filter.
35.3.5 Delete VLAN ID
Syntax:
no vlan
where
= The VLAN ID [1 – 4094]. |
This command deletes the specified VLAN ID entry from the static VLAN table. The following example deletes entry 2 in the static VLAN table.
sysname (config)# no vlan 2
35.4 Enable VLAN
Syntax:
vlan
This command enables the specified VLAN ID in the SVLAN (Static VLAN) table.
276 | Chapter 35 IEEE 802.1Q Tagged VLAN Commands |