Configuring Vlan Translation - Cisco 7604 Configuration Manual
Ios software configuration guide
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Chapter 14
Configuring VLANs
Configuring VLAN Translation
On trunk ports, you can translate one VLAN number to another VLAN number, which transfers all traffic
received in one VLAN to the other VLAN.
These sections describe VLAN translation:
•
•
•
Note
•
•
VLAN Translation Guidelines and Restrictions
When translating VLANs, follow these guidelines and restrictions:
•
•
•
•
•
Product Number
WS-SUP720-3BXL
WS-SUP720-3B
WS-SUP720
WS-SUP32-10GE
OL-4266-08
VLAN Translation Guidelines and Restrictions, page 14-13
Configuring VLAN Translation on a Trunk Port, page 14-15
Enabling VLAN Translation on Other Ports in a Port Group, page 14-15
Release 12.2(17b)SXA and later releases support VLAN translation.
To avoid spanning tree loops, be careful not to misconfigure the VLAN translation feature.
A VLAN translation configuration is inactive if it is applied to ports that are not Layer 2 trunks.
Do not configure translation of ingress native VLAN traffic on an 802.1Q trunk. Because 802.1Q
native VLAN traffic is untagged, it cannot be recognized for translation. You can translate traffic
from other VLANs to the native VLAN of an 802.1Q trunk.
Do not remove the VLAN to which you are translating from the trunk.
The VLAN translation configuration applies to all ports in a port group. VLAN translation is
disabled by default on all ports in a port group. Enable VLAN translation on ports as needed.
The following table lists:
The modules that support VLAN translation
–
The port groups to which VLAN translation configuration applies
–
The number of VLAN translations supported by the port groups
–
–
The trunk types supported by the modules
Note
LAN ports on OSMs support VLAN translation. LAN ports on OSMs are in a single port
group.
Number of
Ports
2
3
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
Port Ranges
Number of
per
Port Groups
Port Group
1
1–2
2
1, 2–3
Configuring VLANs
Translations
per
VLAN Translation
Port Group
Trunk-Type Support
32
802.1Q
16
ISL
802.1Q
14-13
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