Cisco 7604 User Manual

14-13
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 14 Configuring VLANs
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:
• 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
Note • 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.
VLAN Translation Guidelines and Restrictions
When translating VLANs, follow these guidelines and restrictions:
• 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.
Product Number
Number of
Ports
Number of
Port Groups
Port Ranges
per
Port Group
Translations
per
Port Group
VLAN Translation
Trunk-Type Support
WS-SUP720-3BXL
WS-SUP720-3B
WS-SUP720
2 1 1–2 32 802.1Q
WS-SUP32-10GE 3 2 1, 2–3 16 ISL
802.1Q

Cisco 7604 Specifications

General

Brand	Cisco
Model	7604
Category	Network Router
Language	English