C
HAPTER
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| VLAN Configuration
Configuring VLAN Translation
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To show the VLANs to be mirrored:
1. Click VLAN, Mirror.
2. Select Show from the Action list.
Figure 92: Showing the VLANs to Mirror
CONFIGURING VLAN TRANSLATION
Use the VLAN > Translation (Add) page to map VLAN IDs between the
customer and service provider for networks that do not support IEEE
802.1Q tunneling.
CLI REFERENCES
â—† "Configuring VLAN Translation" on page 1151
COMMAND USAGE
◆ QinQ tunneling uses double tagging to preserve the customer’s VLAN
tags on traffic crossing the service provider’s network. However, if any
switch in the path crossing the service provider’s network does not
support this feature, then the switches directly connected to that device
can be configured to swap the customer’s VLAN ID with the service
provider’s VLAN ID for upstream traffic, or the service provider’s VLAN
ID with the customer’s VLAN ID for downstream traffic.
For example, assume that the upstream switch does not support QinQ
tunneling. Select Port 1, and set the Old VLAN to 10 and the New VLAN
to 100 to map VLAN 10 to VLAN 100 for upstream traffic entering port
1, and VLAN 100 to VLAN 10 for downstream traffic leaving port 1 as
shown below.
Figure 93: Configuring VLAN Translation
â—† The maximum number of VLAN translation entries is 8 per port, and up
to 96 for the system. However, note that configuring a large number of
entries may degrade the performance of other processes that also use
the TCAM, such as IP Source Guard filter rules, Quality of Service (QoS)
processes, QinQ, MAC-based VLANs, VLAN translation, or traps.
12
(VLAN 10) (VLAN 100)
(VLAN 100)
(VLAN 10)
upstream
downstream
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