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Introduction
1-5
1.3.3.2 Non-Preserving Priority
Use this method if there is no concern about passing priority from one device to
another. Configure the same PVID at both ends of the trunk link to ensure that all
traffic will be forwarded correctly.
In order to implement this, the ports at both ends of the link must work the same,
that is:
• Strips tags on egress of the ports that match the PVID
• Inserts a tag using the PVID when there is no tag
• Changes the tag on egress with an ID of zero to the PVID
The tag will be stripped on egress of that port, when it matches the PVID. When
the packet is received by the peer, a tag with the same VLAN ID will be inserted
and the packet will be forwarded as though the packet traversed the trunk link
with the tag in place. However, the priority bits will not be reserved.
1.3.4 Accessing Network Management Using VLANs
When an IP address is configured on the unit, it must be associated with the
VLAN. If multiple VLANs are configured on a switch, you can configure
multiple IP addresses provided they are on separate subnets. Therefore, when an
IP address is assigned to a switch, the VLAN ID for the subnet must be specified.
When the network management processor issues a response to a network
management packet, it selects the correct VLAN ID to use based on the IP
subnet.
For further information, refer to IP Address Command or the VLAN Command in
Chapter 2, Enhancements to LCM Commands.