Motorola 3397GP manual Administrator’s Handbook

Administrator’s Handbook

Displayed port interfaces vary depending on the kinds of physical ports on your Gateway, for exam- ple, Ethernet.

For Motorola Netopia® VGx technology models, separate Ethernet switch ports are displayed and may be configured.

To enable any of them on this VLAN, check the associated Enable checkbox(es). Typically you will choose a physical port, such as an Ethernet port (example: eth0.1).

❑When you enable an interface, the Tag, Priority, and Promote checkboxes, and the 802.1p Priority Bit menu appear for that interface.

Tag – Packets transmitted from this port through this VLAN must be tagged with the VLAN VID. Pack- ets received through this port destined for this VLAN must be tagged with the VLAN VID by the source. The Tag option is only available on global type ports.

Priority – Use any 802.1p priority bits in the VLAN header to prioritize packets within the Gateway’s internal queues, according to DiffServ priority mapping rules.

Promote – When checked, this port writes any specified 802.1p priority bits (page 81) into the IP- TOS header bit field for IP packets received on this port, destined for this particular VLAN. It writes any specified IP-TOS priority bits into the 802.1p priority bit field for tagged IP packets transmitted from this port for this VLAN.

All mappings between Ethernet 802.1p and IP-TOS are made according to a pre-defined QoS map- ping policy. The pre-defined mapping can now be set in the CLI. See “Queue Configuration” on page 177.

802.1p Priority Bit – If you select a value greater than 0, all packets received on this port with unmarked priority bits will be re-marked to this priority. If the port 802.1p PBit is greater than 0, the VLAN 802.1p PBit setting is ignored.

❑Select an IP Interface for this VLAN if it is to be routed; otherwise leave the default. These selec- tions will vary depending on your IP interfaces. For example, if you have set up multiple VCCs, these will appear in the list as ip-vcc1, ip-vcc2, and so forth.

❑When you select an IP interface, the screen expands to allow you to configure Inter-Vlan-Groups. Inter-VLAN groups allow VLANs in the group to route traffic to the others; ungrouped VLANs cannot route traffic to each other.

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