THOMSON R7.4, Configuration Manual

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E-DOC-CTC-20080229-0001 v1.0
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4| Ethernet Bridge and VLANs
The parameter can have one of the following values:
None : the extra tagging feature is not used.
C-vlan : the extra tagging feature is used. When a frame is sent out on the bridge port, two tags are added:
an inner C-tag with the inner VID and an outer C-tag with the outer VID.
S-vlan : the extra tagging feature is used. When a frame is sent out on the bridge port, two tags are added:
an inner C-tag with the inner VID and an outer S-tag with the outer VID.
Adding a VID translation entry
If a bridge port receives a VLAN-tagged frame, the VID translation table indicates the VID value of the
corresponding outer VID.
An entry can be added to the VID translation table using the command
:eth bridge xtratag add
.
To create an entry, three parameters must be specified:
Intf : the name of the bridge port.
Innervid : the inner VID. This parameter can be set to:
A number within the range from 1 through 4094.
All , indicating that any inner VID is translated to the specified outer VID.
Outervid : the outer VID. This parameter can be set to:
A number within the range from 1 through 4094.
Notag , indicating that no outer VLAN tag is added.
Transparent , indicating that the outer VID is set to the inner VID.
In addition, if the bridge port is not a member of the default bridge instance, the following parameter must be
specified:
Brname : the name of the bridge instance to which the bridge port belongs. If this parameter is not
specified, the default bridge instance is selected.
=>:eth bridge ifconfig intf=eth_data xtratagging=c-vlan
=>:eth bridge iflist intf=eth_data
eth_data : dest : atm_data
Connection State: connected Retry: 10
Priority Tagging: Disabled
Port: wan0
PortNr: 6 PortState: forwarding Interface: unknown
Multicast filter: disabled Dynamic VLAN : disabled
WAN : enabled
IGMP snooping : enabled
Transparent Prio: disabled
BPDU Filtering
: disabled
Extra Tagging : c-vlan
VLAN: Default VLAN: default Ingressfiltering: disabled Acceptvlanonly: disabled
VLAN: Priority: disabled IP Prec: disabled Priority: 0
Regeneration table: 0 1 2 3 4 5 6 7
RX bytes: 0
frames: 0
TX bytes: 0 frames: 0 dropframes: 0
=>:eth bridge xtratag add intf=eth_data innervid=2 outervid=5
=>:eth bridge xtratag add intf=eth_data innervid=3 outervid=4
Entries can not be added for bridge ports with the extra tagging mode none .
Per bridge port, not more than four entries can be added to the VID translation table.