3Com 8807 Configuration Manual page 851

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Traffic
Classification-Based
Nested VLAN
Configuration Example
n
Table 815 Configure traffic classification-based nest vlan
Configuration step
Deliver a Layer 3
traffic classification
rule
Modify outer VLAN
Deliver both Layer 2
tags for the packets
and Layer 3 traffic
matching the ACL
classification rules
flow rules
Deliver a Layer 2
traffic classification
rule
CAUTION: At present, the traffic-redirect { nested-vlan | modified-vlan }
command is only supported on 3C17533 24-port 1000 Base-X modules.
Network requirements
As shown in Figure 199, two types of services run on the Switch 8814:
■
common internet access and on-demand multicast video. Traffic
classification-based nested VLAN encapsulates different tags at the exterior
layer to distinguish the two services based on the packet tag sent by the digital
subscriber line access multiplexer telnet (DSLAM).
VLAN 100 to VLAN 512 can be used by internet access users at home. For the
■
packets in this VLAN range, Switch 8814 needs to encapsulate another
external tag of VLAN 1000, and then sends the packets to BRAS.
VLAN 600 is a multicast VLAN. When receiving a packet with the tag of VLAN
600, Switch 8814 does not process the packet.
Assume that 3C17533 24-port 1000 Base-X modules are installed in the slot 2 of
Switch A and Switch C. And a card with any type of GE port is installed in slot 3 of
Switch B.
Traffic Classification-Based Nested VLAN Configuration
Command
traffic-redirect
inbound ip-group {
acl-number | acl-name
} [ rule rule [
system-index index ]
] modified-vlan
modified-vlanid
traffic-redirect
inbound ip-group {
acl-number | acl-name
} [ rule rule ]
link-group {
acl-number | acl-name
} [ rule rule ]
modified-vlan
modified-vlanid
traffic-redirect
inbound link-group
{ acl-number |
acl-name } [ rule rule [
system-index index ]
] modified-vlan
modified-vlanid
851
Description
This command
modifies the outer
VLAN tag of the
packets.