
Chapter 46 IEEE 802.1Q Tagged VLAN and Isolation Commands
IES-612-51 User’s Guide
290
46.3.4 VLAN Set Command Examples
This command adds or modifies an entry in the static VLAN table. Use the switch vlan
show command to display your configuration. An example of a configuration is shown next.
46.3.4.1 Modify a Static VLAN Table Example
The following is an example of how to modify a static VLAN table.
46.3.4.2 Forwarding Process Example
Tagged Frames
1 First the IES-612-51 checks the VLAN ID (VID) of tagged frames or assigns temporary
VIDs to untagged frames (see Section 46.3.2 on page 289).
2 The IES-612-51 checks the frame’s source MAC address against the MAC filter.
3 The IES-612-51 then checks the VID in a frame’s tag against the SVLAN table.
4 The IES-612-51 notes what the SVLAN table says (that is, the SVLAN tells the IES-
612-51 whether or not to forward a frame and if the forwarded frames should have a
tag).
5 Frames might be dropped if they are sent to a CPE (customer premises equipment) xDSL
device that does not accept tagged frames.
Untagged Frames
1 An untagged frame comes in from the LAN.
2 The IES-612-51 checks the frame’s source MAC address against the MAC filter.
3 The IES-612-51 checks the PVID table and assigns a VID and IEEE 802.1Q priority.
4 The IES-612-51 ignores the port from which the frame came, because the IES-612-51
does not send a frame to the port from which it came. The IES-612-51 also does not
forward frames to “forbidden” ports.
5 If after looking at the SVLAN, the IES-612-51 does not have any ports to which it will
send the frame, it drops the frame.
46.3.5 VLAN Frame Type Command Example
The following example sets the IES-612-51 to accept only VLAN tagged Ethernet frames on
xDSL port 3.
46.3.6 VLAN CPU Show Command Example
The following example sets VLAN ID 2 to be the CPU (management) VLAN.
ras> switch vlan set 2000 1:FU
ras> switch vlan set 2001 2:FU
ras> switch vlan frametype 3 tag
ras> switch vlan cpu set 2
Kommentare zu diesen Handbüchern